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diff --git a/Chapter01/Problem01A/Main.java → chapter01/problem_a/Main.java b/Chapter01/Problem01A/Main.java → chapter01/problem_a/Main.java
diff --git a/Chapter01/Problem01A/app.js → chapter01/problem_a/app.js b/Chapter01/Problem01A/app.js → chapter01/problem_a/app.js
diff --git a/Chapter01/Problem01A/main.rs → chapter01/problem_a/main.rs b/Chapter01/Problem01A/main.rs → chapter01/problem_a/main.rs
diff --git a/Chapter01/Problem01A/readme.md → chapter01/problem_a/readme.md b/Chapter01/Problem01A/readme.md → chapter01/problem_a/readme.md
diff --git a/Chapter01/Problem01A/solution.cpp → chapter01/problem_a/solution.cpp b/Chapter01/Problem01A/solution.cpp → chapter01/problem_a/solution.cpp
diff --git a/Chapter01/Problem01A/solution.py → chapter01/problem_a/solution.py b/Chapter01/Problem01A/solution.py → chapter01/problem_a/solution.py
diff --git a/Chapter01/Problem01B/Main.java → chapter01/problem_b/Main.java b/Chapter01/Problem01B/Main.java → chapter01/problem_b/Main.java
diff --git a/Chapter01/Problem01B/app.js → chapter01/problem_b/app.js b/Chapter01/Problem01B/app.js → chapter01/problem_b/app.js
diff --git a/Chapter01/Problem01B/main.rs → chapter01/problem_b/main.rs b/Chapter01/Problem01B/main.rs → chapter01/problem_b/main.rs
diff --git a/Chapter01/Problem01B/solution.cpp → chapter01/problem_b/solution.cpp b/Chapter01/Problem01B/solution.cpp → chapter01/problem_b/solution.cpp
diff --git a/Chapter01/Problem01B/solution.py → chapter01/problem_b/solution.py b/Chapter01/Problem01B/solution.py → chapter01/problem_b/solution.py
diff --git a/Chapter01/Problem01C/Main.java → chapter01/problem_c/Main.java b/Chapter01/Problem01C/Main.java → chapter01/problem_c/Main.java
diff --git a/Chapter01/Problem01C/app.js → chapter01/problem_c/app.js b/Chapter01/Problem01C/app.js → chapter01/problem_c/app.js
diff --git a/Chapter01/Problem01C/main.rs → chapter01/problem_c/main.rs b/Chapter01/Problem01C/main.rs → chapter01/problem_c/main.rs
diff --git a/Chapter01/Problem01C/solution.cpp → chapter01/problem_c/solution.cpp b/Chapter01/Problem01C/solution.cpp → chapter01/problem_c/solution.cpp
diff --git a/Chapter01/Problem01C/solution.py → chapter01/problem_c/solution.py b/Chapter01/Problem01C/solution.py → chapter01/problem_c/solution.py
diff --git a/Chapter01/Problem01D/Main.java → chapter01/problem_d/Main.java b/Chapter01/Problem01D/Main.java → chapter01/problem_d/Main.java
diff --git a/Chapter01/Problem01D/app.js → chapter01/problem_d/app.js b/Chapter01/Problem01D/app.js → chapter01/problem_d/app.js
diff --git a/Chapter01/Problem01D/main.rs → chapter01/problem_d/main.rs b/Chapter01/Problem01D/main.rs → chapter01/problem_d/main.rs
diff --git a/Chapter01/Problem01D/solution.cpp → chapter01/problem_d/solution.cpp b/Chapter01/Problem01D/solution.cpp → chapter01/problem_d/solution.cpp
diff --git a/Chapter01/Problem01D/solution.py → chapter01/problem_d/solution.py b/Chapter01/Problem01D/solution.py → chapter01/problem_d/solution.py
diff --git a/Chapter01/Problem01E/Main.java → chapter01/problem_e/Main.java b/Chapter01/Problem01E/Main.java → chapter01/problem_e/Main.java
diff --git a/Chapter01/Problem01E/app.js → chapter01/problem_e/app.js b/Chapter01/Problem01E/app.js → chapter01/problem_e/app.js
diff --git a/Chapter01/Problem01E/main.rs → chapter01/problem_e/main.rs b/Chapter01/Problem01E/main.rs → chapter01/problem_e/main.rs
diff --git a/Chapter01/Problem01E/solution.cpp → chapter01/problem_e/solution.cpp b/Chapter01/Problem01E/solution.cpp → chapter01/problem_e/solution.cpp
diff --git a/Chapter01/Problem01E/solution.py → chapter01/problem_e/solution.py b/Chapter01/Problem01E/solution.py → chapter01/problem_e/solution.py
diff --git a/Chapter01/Problem01F/Main.java → chapter01/problem_f/Main.java b/Chapter01/Problem01F/Main.java → chapter01/problem_f/Main.java
diff --git a/Chapter01/Problem01F/app.js → chapter01/problem_f/app.js b/Chapter01/Problem01F/app.js → chapter01/problem_f/app.js
diff --git a/Chapter01/Problem01F/main.rs → chapter01/problem_f/main.rs b/Chapter01/Problem01F/main.rs → chapter01/problem_f/main.rs
diff --git a/Chapter01/Problem01F/solution.cpp → chapter01/problem_f/solution.cpp b/Chapter01/Problem01F/solution.cpp → chapter01/problem_f/solution.cpp
diff --git a/Chapter01/Problem01G/Main.java → chapter01/problem_g/Main.java b/Chapter01/Problem01G/Main.java → chapter01/problem_g/Main.java
diff --git a/Chapter01/Problem01G/app.js → chapter01/problem_g/app.js b/Chapter01/Problem01G/app.js → chapter01/problem_g/app.js
diff --git a/Chapter01/Problem01G/main.rs → chapter01/problem_g/main.rs b/Chapter01/Problem01G/main.rs → chapter01/problem_g/main.rs
diff --git a/Chapter01/Problem01G/solution.cpp → chapter01/problem_g/solution.cpp b/Chapter01/Problem01G/solution.cpp → chapter01/problem_g/solution.cpp
diff --git a/Chapter01/Problem01H/Main.java → chapter01/problem_h/Main.java b/Chapter01/Problem01H/Main.java → chapter01/problem_h/Main.java
diff --git a/Chapter01/Problem01H/app.js → chapter01/problem_h/app.js b/Chapter01/Problem01H/app.js → chapter01/problem_h/app.js
diff --git a/Chapter01/Problem01H/main.rs → chapter01/problem_h/main.rs b/Chapter01/Problem01H/main.rs → chapter01/problem_h/main.rs
diff --git a/Chapter01/Problem01H/solution.cpp → chapter01/problem_h/solution.cpp b/Chapter01/Problem01H/solution.cpp → chapter01/problem_h/solution.cpp
diff --git a/Chapter01/Problem01I/Main.java → chapter01/problem_i/Main.java b/Chapter01/Problem01I/Main.java → chapter01/problem_i/Main.java
diff --git a/Chapter01/Problem01I/app.js → chapter01/problem_i/app.js b/Chapter01/Problem01I/app.js → chapter01/problem_i/app.js
diff --git a/Chapter01/Problem01I/main.rs → chapter01/problem_i/main.rs b/Chapter01/Problem01I/main.rs → chapter01/problem_i/main.rs
diff --git a/Chapter01/Problem01I/solution.cpp → chapter01/problem_i/solution.cpp b/Chapter01/Problem01I/solution.cpp → chapter01/problem_i/solution.cpp
diff --git a/Chapter01/Problem01J/Main.java → chapter01/problem_j/Main.java b/Chapter01/Problem01J/Main.java → chapter01/problem_j/Main.java
diff --git a/Chapter01/Problem01J/app.js → chapter01/problem_j/app.js b/Chapter01/Problem01J/app.js → chapter01/problem_j/app.js
diff --git a/Chapter01/Problem01J/main.rs → chapter01/problem_j/main.rs b/Chapter01/Problem01J/main.rs → chapter01/problem_j/main.rs
diff --git a/Chapter01/Problem01J/solution.cpp → chapter01/problem_j/solution.cpp b/Chapter01/Problem01J/solution.cpp → chapter01/problem_j/solution.cpp
diff --git a/Chapter02/Problem02A/Main.java → chapter02/problem_a/Main.java b/Chapter02/Problem02A/Main.java → chapter02/problem_a/Main.java
diff --git a/Chapter02/Problem02A/main.rs → chapter02/problem_a/main.rs b/Chapter02/Problem02A/main.rs → chapter02/problem_a/main.rs
diff --git a/Chapter02/Problem02A/solution.cpp → chapter02/problem_a/solution.cpp b/Chapter02/Problem02A/solution.cpp → chapter02/problem_a/solution.cpp
diff --git a/Chapter02/Problem02A/solution.py → chapter02/problem_a/solution.py b/Chapter02/Problem02A/solution.py → chapter02/problem_a/solution.py
diff --git a/Chapter02/Problem02B/Main.java → chapter02/problem_b/Main.java b/Chapter02/Problem02B/Main.java → chapter02/problem_b/Main.java
diff --git a/Chapter02/Problem02B/main.rs → chapter02/problem_b/main.rs b/Chapter02/Problem02B/main.rs → chapter02/problem_b/main.rs
diff --git a/Chapter02/Problem02B/solution.cpp → chapter02/problem_b/solution.cpp b/Chapter02/Problem02B/solution.cpp → chapter02/problem_b/solution.cpp
diff --git a/Chapter02/Problem02C/Main.java → chapter02/problem_c/Main.java b/Chapter02/Problem02C/Main.java → chapter02/problem_c/Main.java
diff --git a/Chapter02/Problem02C/main.rs → chapter02/problem_c/main.rs b/Chapter02/Problem02C/main.rs → chapter02/problem_c/main.rs
diff --git a/Chapter02/Problem02C/solution.cpp → chapter02/problem_c/solution.cpp b/Chapter02/Problem02C/solution.cpp → chapter02/problem_c/solution.cpp
diff --git a/Chapter02/Problem02D/Main.java → chapter02/problem_d/Main.java b/Chapter02/Problem02D/Main.java → chapter02/problem_d/Main.java
diff --git a/Chapter02/Problem02D/main.rs → chapter02/problem_d/main.rs b/Chapter02/Problem02D/main.rs → chapter02/problem_d/main.rs
diff --git a/Chapter02/Problem02D/solution.cpp → chapter02/problem_d/solution.cpp b/Chapter02/Problem02D/solution.cpp → chapter02/problem_d/solution.cpp
diff --git a/Chapter02/Problem02E/Main.java → chapter02/problem_e/Main.java b/Chapter02/Problem02E/Main.java → chapter02/problem_e/Main.java
diff --git a/Chapter02/Problem02E/main.rs → chapter02/problem_e/main.rs b/Chapter02/Problem02E/main.rs → chapter02/problem_e/main.rs
diff --git a/Chapter02/Problem02E/solution.cpp → chapter02/problem_e/solution.cpp b/Chapter02/Problem02E/solution.cpp → chapter02/problem_e/solution.cpp
diff --git a/Chapter02/Problem02F/Main.java → chapter02/problem_f/Main.java b/Chapter02/Problem02F/Main.java → chapter02/problem_f/Main.java
diff --git a/Chapter02/Problem02F/main.rs → chapter02/problem_f/main.rs b/Chapter02/Problem02F/main.rs → chapter02/problem_f/main.rs
diff --git a/Chapter02/Problem02F/solution.cpp → chapter02/problem_f/solution.cpp b/Chapter02/Problem02F/solution.cpp → chapter02/problem_f/solution.cpp
diff --git a/Chapter02/Problem02G/Main.java → chapter02/problem_g/Main.java b/Chapter02/Problem02G/Main.java → chapter02/problem_g/Main.java
diff --git a/Chapter02/Problem02G/main.rs → chapter02/problem_g/main.rs b/Chapter02/Problem02G/main.rs → chapter02/problem_g/main.rs
diff --git a/Chapter02/Problem02G/solution.cpp → chapter02/problem_g/solution.cpp b/Chapter02/Problem02G/solution.cpp → chapter02/problem_g/solution.cpp
diff --git a/Chapter02/Problem02H/Main.java → chapter02/problem_h/Main.java b/Chapter02/Problem02H/Main.java → chapter02/problem_h/Main.java
diff --git a/Chapter02/Problem02H/solution.cpp → chapter02/problem_h/solution.cpp b/Chapter02/Problem02H/solution.cpp → chapter02/problem_h/solution.cpp
diff --git a/Chapter02/Problem02I/Main.java → chapter02/problem_i/Main.java b/Chapter02/Problem02I/Main.java → chapter02/problem_i/Main.java
diff --git a/Chapter02/Problem02I/main.rs → chapter02/problem_i/main.rs b/Chapter02/Problem02I/main.rs → chapter02/problem_i/main.rs
diff --git a/Chapter02/Problem02I/solution.cpp → chapter02/problem_i/solution.cpp b/Chapter02/Problem02I/solution.cpp → chapter02/problem_i/solution.cpp
diff --git a/Chapter02/Problem02J/Main.java → chapter02/problem_j/Main.java b/Chapter02/Problem02J/Main.java → chapter02/problem_j/Main.java
diff --git a/Chapter02/Problem02J/main.rs → chapter02/problem_j/main.rs b/Chapter02/Problem02J/main.rs → chapter02/problem_j/main.rs
diff --git a/Chapter02/Problem02J/solution.cpp → chapter02/problem_j/solution.cpp b/Chapter02/Problem02J/solution.cpp → chapter02/problem_j/solution.cpp
diff --git a/Chapter03/Problem03A/Main.java → chapter03/problem_a/Main.java b/Chapter03/Problem03A/Main.java → chapter03/problem_a/Main.java
diff --git a/Chapter03/Problem03A/main.rs → chapter03/problem_a/main.rs b/Chapter03/Problem03A/main.rs → chapter03/problem_a/main.rs
diff --git a/Chapter03/Problem03A/solution.cpp → chapter03/problem_a/solution.cpp b/Chapter03/Problem03A/solution.cpp → chapter03/problem_a/solution.cpp
diff --git a/Chapter03/Problem03A/solution.js → chapter03/problem_a/solution.js b/Chapter03/Problem03A/solution.js → chapter03/problem_a/solution.js
diff --git a/Chapter03/Problem03B/Main.java → chapter03/problem_b/Main.java b/Chapter03/Problem03B/Main.java → chapter03/problem_b/Main.java
diff --git a/Chapter03/Problem03B/main.rs → chapter03/problem_b/main.rs b/Chapter03/Problem03B/main.rs → chapter03/problem_b/main.rs
diff --git a/Chapter03/Problem03B/solution.cpp → chapter03/problem_b/solution.cpp b/Chapter03/Problem03B/solution.cpp → chapter03/problem_b/solution.cpp
diff --git a/Chapter03/Problem03C/Main.java → chapter03/problem_c/Main.java b/Chapter03/Problem03C/Main.java → chapter03/problem_c/Main.java
diff --git a/Chapter03/Problem03C/main.rs → chapter03/problem_c/main.rs b/Chapter03/Problem03C/main.rs → chapter03/problem_c/main.rs
diff --git a/Chapter03/Problem03C/solution.cpp → chapter03/problem_c/solution.cpp b/Chapter03/Problem03C/solution.cpp → chapter03/problem_c/solution.cpp
diff --git a/Chapter03/Problem03D/Main.java → chapter03/problem_d/Main.java b/Chapter03/Problem03D/Main.java → chapter03/problem_d/Main.java
diff --git a/Chapter03/Problem03D/main.rs → chapter03/problem_d/main.rs b/Chapter03/Problem03D/main.rs → chapter03/problem_d/main.rs
diff --git a/Chapter03/Problem03D/solution.cpp → chapter03/problem_d/solution.cpp b/Chapter03/Problem03D/solution.cpp → chapter03/problem_d/solution.cpp
diff --git a/Chapter03/Problem03E/Main.java → chapter03/problem_e/Main.java b/Chapter03/Problem03E/Main.java → chapter03/problem_e/Main.java
diff --git a/Chapter03/Problem03E/solution.cpp → chapter03/problem_e/solution.cpp b/Chapter03/Problem03E/solution.cpp → chapter03/problem_e/solution.cpp
diff --git a/Chapter03/Problem03F/Main.java → chapter03/problem_f/Main.java b/Chapter03/Problem03F/Main.java → chapter03/problem_f/Main.java
diff --git a/Chapter03/Problem03F/main.rs → chapter03/problem_f/main.rs b/Chapter03/Problem03F/main.rs → chapter03/problem_f/main.rs
diff --git a/Chapter03/Problem03F/solution.cpp → chapter03/problem_f/solution.cpp b/Chapter03/Problem03F/solution.cpp → chapter03/problem_f/solution.cpp
diff --git a/Chapter03/Problem03G/Main.java → chapter03/problem_g/Main.java b/Chapter03/Problem03G/Main.java → chapter03/problem_g/Main.java
diff --git a/Chapter03/Problem03G/solution.cpp → chapter03/problem_g/solution.cpp b/Chapter03/Problem03G/solution.cpp → chapter03/problem_g/solution.cpp
diff --git a/Chapter03/Problem03H/Main.java → chapter03/problem_h/Main.java b/Chapter03/Problem03H/Main.java → chapter03/problem_h/Main.java
diff --git a/Chapter03/Problem03H/main.rs → chapter03/problem_h/main.rs b/Chapter03/Problem03H/main.rs → chapter03/problem_h/main.rs
diff --git a/Chapter03/Problem03H/solution.cpp → chapter03/problem_h/solution.cpp b/Chapter03/Problem03H/solution.cpp → chapter03/problem_h/solution.cpp
diff --git a/Chapter03/Problem03I/Main.java → chapter03/problem_i/Main.java b/Chapter03/Problem03I/Main.java → chapter03/problem_i/Main.java
diff --git a/Chapter03/Problem03I/main.rs → chapter03/problem_i/main.rs b/Chapter03/Problem03I/main.rs → chapter03/problem_i/main.rs
diff --git a/Chapter03/Problem03I/solution.cpp → chapter03/problem_i/solution.cpp b/Chapter03/Problem03I/solution.cpp → chapter03/problem_i/solution.cpp
diff --git a/Chapter03/Problem03J/Main.java → chapter03/problem_j/Main.java b/Chapter03/Problem03J/Main.java → chapter03/problem_j/Main.java
diff --git a/Chapter03/Problem03J/main.rs → chapter03/problem_j/main.rs b/Chapter03/Problem03J/main.rs → chapter03/problem_j/main.rs
diff --git a/Chapter03/Problem03J/solution.cpp → chapter03/problem_j/solution.cpp b/Chapter03/Problem03J/solution.cpp → chapter03/problem_j/solution.cpp
diff --git a/Chapter04/Problem04A/Main.java → chapter04/problem_a/Main.java b/Chapter04/Problem04A/Main.java → chapter04/problem_a/Main.java
diff --git a/Chapter04/Problem04A/main.rs → chapter04/problem_a/main.rs b/Chapter04/Problem04A/main.rs → chapter04/problem_a/main.rs
diff --git a/Chapter04/Problem04A/solution.cpp → chapter04/problem_a/solution.cpp b/Chapter04/Problem04A/solution.cpp → chapter04/problem_a/solution.cpp
diff --git a/Chapter04/Problem04B/Main.java → chapter04/problem_b/Main.java b/Chapter04/Problem04B/Main.java → chapter04/problem_b/Main.java
diff --git a/Chapter04/Problem04B/main.rs → chapter04/problem_b/main.rs b/Chapter04/Problem04B/main.rs → chapter04/problem_b/main.rs
diff --git a/Chapter04/Problem04B/solution.cpp → chapter04/problem_b/solution.cpp b/Chapter04/Problem04B/solution.cpp → chapter04/problem_b/solution.cpp
diff --git a/Chapter04/Problem04C/Main.java → chapter04/problem_c/Main.java b/Chapter04/Problem04C/Main.java → chapter04/problem_c/Main.java
diff --git a/Chapter04/Problem04C/main.rs → chapter04/problem_c/main.rs b/Chapter04/Problem04C/main.rs → chapter04/problem_c/main.rs
diff --git a/Chapter04/Problem04C/solution.cpp → chapter04/problem_c/solution.cpp b/Chapter04/Problem04C/solution.cpp → chapter04/problem_c/solution.cpp
diff --git a/Chapter04/Problem04D/Main.java → chapter04/problem_d/Main.java b/Chapter04/Problem04D/Main.java → chapter04/problem_d/Main.java
diff --git a/Chapter04/Problem04D/main.rs → chapter04/problem_d/main.rs b/Chapter04/Problem04D/main.rs → chapter04/problem_d/main.rs
diff --git a/Chapter04/Problem04D/solution.cpp → chapter04/problem_d/solution.cpp b/Chapter04/Problem04D/solution.cpp → chapter04/problem_d/solution.cpp
diff --git a/Chapter04/Problem04E/Main.java → chapter04/problem_e/Main.java b/Chapter04/Problem04E/Main.java → chapter04/problem_e/Main.java
diff --git a/Chapter04/Problem04E/main.rs → chapter04/problem_e/main.rs b/Chapter04/Problem04E/main.rs → chapter04/problem_e/main.rs
diff --git a/Chapter04/Problem04E/solution.cpp → chapter04/problem_e/solution.cpp b/Chapter04/Problem04E/solution.cpp → chapter04/problem_e/solution.cpp
diff --git a/Chapter04/Problem04F/Main.java → chapter04/problem_f/Main.java b/Chapter04/Problem04F/Main.java → chapter04/problem_f/Main.java
diff --git a/Chapter04/Problem04F/main.rs → chapter04/problem_f/main.rs b/Chapter04/Problem04F/main.rs → chapter04/problem_f/main.rs
diff --git a/Chapter04/Problem04F/solution.cpp → chapter04/problem_f/solution.cpp b/Chapter04/Problem04F/solution.cpp → chapter04/problem_f/solution.cpp
diff --git a/Chapter04/Problem04G/Main.java → chapter04/problem_g/Main.java b/Chapter04/Problem04G/Main.java → chapter04/problem_g/Main.java
diff --git a/Chapter04/Problem04G/main.rs → chapter04/problem_g/main.rs b/Chapter04/Problem04G/main.rs → chapter04/problem_g/main.rs
diff --git a/Chapter04/Problem04G/solution.cpp → chapter04/problem_g/solution.cpp b/Chapter04/Problem04G/solution.cpp → chapter04/problem_g/solution.cpp
diff --git a/Chapter04/Problem04H/Main.java → chapter04/problem_h/Main.java b/Chapter04/Problem04H/Main.java → chapter04/problem_h/Main.java
diff --git a/Chapter04/Problem04H/main.rs → chapter04/problem_h/main.rs b/Chapter04/Problem04H/main.rs → chapter04/problem_h/main.rs
diff --git a/Chapter04/Problem04H/solution.cpp → chapter04/problem_h/solution.cpp b/Chapter04/Problem04H/solution.cpp → chapter04/problem_h/solution.cpp
diff --git a/Chapter04/Problem04I/Main.java → chapter04/problem_i/Main.java b/Chapter04/Problem04I/Main.java → chapter04/problem_i/Main.java
diff --git a/Chapter04/Problem04I/main.rs → chapter04/problem_i/main.rs b/Chapter04/Problem04I/main.rs → chapter04/problem_i/main.rs
diff --git a/Chapter04/Problem04I/solution.cpp → chapter04/problem_i/solution.cpp b/Chapter04/Problem04I/solution.cpp → chapter04/problem_i/solution.cpp
diff --git a/Chapter04/Problem04J/Main.java → chapter04/problem_j/Main.java b/Chapter04/Problem04J/Main.java → chapter04/problem_j/Main.java
diff --git a/Chapter04/Problem04J/main.rs → chapter04/problem_j/main.rs b/Chapter04/Problem04J/main.rs → chapter04/problem_j/main.rs
diff --git a/Chapter04/Problem04J/solution.cpp → chapter04/problem_j/solution.cpp b/Chapter04/Problem04J/solution.cpp → chapter04/problem_j/solution.cpp
diff --git a/Chapter05/Problem05A/Main.java → chapter05/problem_a/Main.java b/Chapter05/Problem05A/Main.java → chapter05/problem_a/Main.java
diff --git a/Chapter05/Problem05A/main.cpp → chapter05/problem_a/main.cpp b/Chapter05/Problem05A/main.cpp → chapter05/problem_a/main.cpp
diff --git a/Chapter05/Problem05B/Main.java → chapter05/problem_b/Main.java b/Chapter05/Problem05B/Main.java → chapter05/problem_b/Main.java
diff --git a/Chapter05/Problem05B/main.cpp → chapter05/problem_b/main.cpp b/Chapter05/Problem05B/main.cpp → chapter05/problem_b/main.cpp
diff --git a/Chapter05/Problem05C/Main.java → chapter05/problem_c/Main.java b/Chapter05/Problem05C/Main.java → chapter05/problem_c/Main.java
diff --git a/Chapter05/Problem05C/main.cpp → chapter05/problem_c/main.cpp b/Chapter05/Problem05C/main.cpp → chapter05/problem_c/main.cpp
diff --git a/Chapter05/Problem05D/Main.java → chapter05/problem_d/Main.java b/Chapter05/Problem05D/Main.java → chapter05/problem_d/Main.java
diff --git a/Chapter05/Problem05D/solution.cpp → chapter05/problem_d/solution.cpp b/Chapter05/Problem05D/solution.cpp → chapter05/problem_d/solution.cpp
diff --git a/Chapter05/Problem05E/Main.java → chapter05/problem_e/Main.java b/Chapter05/Problem05E/Main.java → chapter05/problem_e/Main.java
diff --git a/Chapter05/Problem05E/main.cpp → chapter05/problem_e/main.cpp b/Chapter05/Problem05E/main.cpp → chapter05/problem_e/main.cpp
diff --git a/Chapter05/Problem05F/Main.java → chapter05/problem_f/Main.java b/Chapter05/Problem05F/Main.java → chapter05/problem_f/Main.java
diff --git a/Chapter05/Problem05F/main.cpp → chapter05/problem_f/main.cpp b/Chapter05/Problem05F/main.cpp → chapter05/problem_f/main.cpp
diff --git a/Chapter05/Problem05G/Main.java → chapter05/problem_g/Main.java b/Chapter05/Problem05G/Main.java → chapter05/problem_g/Main.java
diff --git a/Chapter05/Problem05G/main.cpp → chapter05/problem_g/main.cpp b/Chapter05/Problem05G/main.cpp → chapter05/problem_g/main.cpp
diff --git a/Chapter05/Problem05H/Main.java → chapter05/problem_h/Main.java b/Chapter05/Problem05H/Main.java → chapter05/problem_h/Main.java
diff --git a/Chapter05/Problem05H/main.cpp → chapter05/problem_h/main.cpp b/Chapter05/Problem05H/main.cpp → chapter05/problem_h/main.cpp
diff --git a/Chapter05/Problem05I/Main.java → chapter05/problem_i/Main.java b/Chapter05/Problem05I/Main.java → chapter05/problem_i/Main.java
diff --git a/Chapter05/Problem05I/main.cpp → chapter05/problem_i/main.cpp b/Chapter05/Problem05I/main.cpp → chapter05/problem_i/main.cpp
diff --git a/Chapter05/Problem05J/Main.java → chapter05/problem_j/Main.java b/Chapter05/Problem05J/Main.java → chapter05/problem_j/Main.java
diff --git a/Chapter05/Problem05J/main.cpp → chapter05/problem_j/main.cpp b/Chapter05/Problem05J/main.cpp → chapter05/problem_j/main.cpp
diff --git a/Chapter05/Problem05K/Main.java → chapter05/problem_k/Main.java b/Chapter05/Problem05K/Main.java → chapter05/problem_k/Main.java
diff --git a/Chapter05/Problem05K/Source.py → chapter05/problem_k/Source.py b/Chapter05/Problem05K/Source.py → chapter05/problem_k/Source.py
diff --git a/Chapter05/Problem05K/data/gen.py → chapter05/problem_k/data/gen.py b/Chapter05/Problem05K/data/gen.py → chapter05/problem_k/data/gen.py
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diff --git a/Chapter05/Problem05K/main.cpp → chapter05/problem_k/main.cpp b/Chapter05/Problem05K/main.cpp → chapter05/problem_k/main.cpp
diff --git a/Chapter05/Problem05L/Main.java → chapter05/problem_l/Main.java b/Chapter05/Problem05L/Main.java → chapter05/problem_l/Main.java
diff --git a/Chapter05/Problem05L/main.cpp → chapter05/problem_l/main.cpp b/Chapter05/Problem05L/main.cpp → chapter05/problem_l/main.cpp
diff --git a/Chapter05/Problem05M/Main.java → chapter05/problem_m/Main.java b/Chapter05/Problem05M/Main.java → chapter05/problem_m/Main.java
diff --git a/Chapter05/Problem05M/main.cpp → chapter05/problem_m/main.cpp b/Chapter05/Problem05M/main.cpp → chapter05/problem_m/main.cpp
diff --git a/Chapter05/Problem05N/Main.java → chapter05/problem_n/Main.java b/Chapter05/Problem05N/Main.java → chapter05/problem_n/Main.java
diff --git a/Chapter05/Problem05N/main.cpp → chapter05/problem_n/main.cpp b/Chapter05/Problem05N/main.cpp → chapter05/problem_n/main.cpp
diff --git a/Chapter05/Problem05O/Main.java → chapter05/problem_o/Main.java b/Chapter05/Problem05O/Main.java → chapter05/problem_o/Main.java
diff --git a/Chapter05/Problem05O/main.cpp → chapter05/problem_o/main.cpp b/Chapter05/Problem05O/main.cpp → chapter05/problem_o/main.cpp
diff --git a/Chapter07/Problem07A/Main.java → chapter07/problem_a/Main.java b/Chapter07/Problem07A/Main.java → chapter07/problem_a/Main.java
diff --git a/Chapter07/Problem07A/main.cpp → chapter07/problem_a/main.cpp b/Chapter07/Problem07A/main.cpp → chapter07/problem_a/main.cpp
diff --git a/Chapter07/Problem07B/Main.java → chapter07/problem_b/Main.java b/Chapter07/Problem07B/Main.java → chapter07/problem_b/Main.java
diff --git a/Chapter07/Problem07B/main.cpp → chapter07/problem_b/main.cpp b/Chapter07/Problem07B/main.cpp → chapter07/problem_b/main.cpp
diff --git a/Chapter07/Problem07C/Main.java → chapter07/problem_c/Main.java b/Chapter07/Problem07C/Main.java → chapter07/problem_c/Main.java
diff --git a/Chapter07/Problem07C/main.cpp → chapter07/problem_c/main.cpp b/Chapter07/Problem07C/main.cpp → chapter07/problem_c/main.cpp
diff --git a/Chapter07/Problem07D/Main.java → chapter07/problem_d/Main.java b/Chapter07/Problem07D/Main.java → chapter07/problem_d/Main.java
diff --git a/Chapter07/Problem07D/main.cpp → chapter07/problem_d/main.cpp b/Chapter07/Problem07D/main.cpp → chapter07/problem_d/main.cpp
diff --git a/Chapter07/Problem07E/Main.java → chapter07/problem_e/Main.java b/Chapter07/Problem07E/Main.java → chapter07/problem_e/Main.java
diff --git a/Chapter07/Problem07E/main.cpp → chapter07/problem_e/main.cpp b/Chapter07/Problem07E/main.cpp → chapter07/problem_e/main.cpp
diff --git a/Chapter07/Problem07F/Main.java → chapter07/problem_f/Main.java b/Chapter07/Problem07F/Main.java → chapter07/problem_f/Main.java
diff --git a/Chapter07/Problem07F/main.cpp → chapter07/problem_f/main.cpp b/Chapter07/Problem07F/main.cpp → chapter07/problem_f/main.cpp
diff --git a/Chapter07/Problem07G/Main.java → chapter07/problem_g/Main.java b/Chapter07/Problem07G/Main.java → chapter07/problem_g/Main.java
diff --git a/Chapter07/Problem07G/main.cpp → chapter07/problem_g/main.cpp b/Chapter07/Problem07G/main.cpp → chapter07/problem_g/main.cpp
diff --git a/Chapter07/Problem07H/Main.java → chapter07/problem_h/Main.java b/Chapter07/Problem07H/Main.java → chapter07/problem_h/Main.java
diff --git a/Chapter08/Problem08A/Main.java → chapter08/problem_a/Main.java b/Chapter08/Problem08A/Main.java → chapter08/problem_a/Main.java
diff --git a/Chapter08/Problem08A/main.cpp → chapter08/problem_a/main.cpp b/Chapter08/Problem08A/main.cpp → chapter08/problem_a/main.cpp
diff --git a/Chapter08/Problem08B/Main.java → chapter08/problem_b/Main.java b/Chapter08/Problem08B/Main.java → chapter08/problem_b/Main.java
diff --git a/Chapter08/Problem08B/main.cpp → chapter08/problem_b/main.cpp b/Chapter08/Problem08B/main.cpp → chapter08/problem_b/main.cpp
diff --git a/Chapter08/Problem08C/Main.java → chapter08/problem_c/Main.java b/Chapter08/Problem08C/Main.java → chapter08/problem_c/Main.java
diff --git a/Chapter08/Problem08C/main.cpp → chapter08/problem_c/main.cpp b/Chapter08/Problem08C/main.cpp → chapter08/problem_c/main.cpp
diff --git a/Chapter08/Problem08D/Main.java → chapter08/problem_d/Main.java b/Chapter08/Problem08D/Main.java → chapter08/problem_d/Main.java
diff --git a/Chapter08/Problem08D/main.cpp → chapter08/problem_d/main.cpp b/Chapter08/Problem08D/main.cpp → chapter08/problem_d/main.cpp
diff --git a/Chapter08/Problem08E/Main.java → chapter08/problem_e/Main.java b/Chapter08/Problem08E/Main.java → chapter08/problem_e/Main.java
diff --git a/Chapter08/Problem08E/main.cpp → chapter08/problem_e/main.cpp b/Chapter08/Problem08E/main.cpp → chapter08/problem_e/main.cpp
diff --git a/Chapter08/Problem08F/Main.java → chapter08/problem_f/Main.java b/Chapter08/Problem08F/Main.java → chapter08/problem_f/Main.java
diff --git a/Chapter08/Problem08F/main.cpp → chapter08/problem_f/main.cpp b/Chapter08/Problem08F/main.cpp → chapter08/problem_f/main.cpp
diff --git a/Chapter08/Problem08G/Main.java → chapter08/problem_g/Main.java b/Chapter08/Problem08G/Main.java → chapter08/problem_g/Main.java
diff --git a/Chapter08/Problem08G/main.cpp → chapter08/problem_g/main.cpp b/Chapter08/Problem08G/main.cpp → chapter08/problem_g/main.cpp
diff --git a/Chapter08/Problem08H/Main.java → chapter08/problem_h/Main.java b/Chapter08/Problem08H/Main.java → chapter08/problem_h/Main.java
diff --git a/Chapter08/Problem08H/main.cpp → chapter08/problem_h/main.cpp b/Chapter08/Problem08H/main.cpp → chapter08/problem_h/main.cpp
diff --git a/Chapter08/Problem08I/Main.java → chapter08/problem_i/Main.java b/Chapter08/Problem08I/Main.java → chapter08/problem_i/Main.java
diff --git a/Chapter08/Problem08J/Main.java → chapter08/problem_j/Main.java b/Chapter08/Problem08J/Main.java → chapter08/problem_j/Main.java