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_860.java
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package com.fishercoder.solutions;
import java.util.HashMap;
import java.util.Map;
public class _860 {
public static class Solution1 {
public boolean lemonadeChange(int[] bills) {
Map<Integer, Integer> map = new HashMap<>();
for (int bill : bills) {
if (bill == 5) {
map.put(5, map.getOrDefault(5, 0) + 1);
} else if (bill == 10) {
if (!map.containsKey(5)) {
return false;
} else {
map.put(5, map.get(5) - 1);
if (map.get(5) == 0) {
map.remove(5);
}
map.put(10, map.getOrDefault(10, 0) + 1);
}
} else {
if (!map.containsKey(5)) {
return false;
} else {
if (!map.containsKey(10)) {
if (!map.containsKey(5) || map.get(5) < 3) {
return false;
} else {
map.put(5, map.get(5) - 3);
if (map.get(5) == 0) {
map.remove(5);
}
}
} else {
if (!map.containsKey(5)) {
return false;
} else {
map.put(5, map.get(5) - 1);
if (map.get(5) == 0) {
map.remove(5);
}
map.put(10, map.get(10) - 1);
if (map.get(10) == 0) {
map.remove(10);
}
}
}
}
map.put(20, map.getOrDefault(20, 0) + 1);
}
}
return true;
}
}
}