finish maximum ice cream bars

37-50/maximum-ice-cream-bars/Cargo.toml

@@ -0,0 +1,9 @@
+[package]
+name = "maximum-ice-cream-bars"
+version = "0.1.0"
+authors = ["Checky Hu <[email protected]>"]
+edition = "2018"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]

37-50/maximum-ice-cream-bars/src/main.rs

@@ -0,0 +1,46 @@
+use std::env;
+use std::str::FromStr;
+
+struct Solution {}
+
+impl Solution {
+    pub fn max_ice_cream(costs: Vec<i32>, coins: i32) -> i32 {
+        let mut costs_mut: Vec<i32> = costs;
+        costs_mut.sort();
+        let mut ret: i32 = 0;
+        let mut sum: i32 = 0;
+        for cost in costs_mut.iter() {
+            sum += *cost;
+            if sum > coins {
+                break;
+            } else {
+                ret += 1;
+            }
+        }
+        ret
+    }
+}
+
+fn main() {
+    let mut ret: usize = 0;
+    let mut coins: i32 = 0;
+    let mut costs: Vec<i32> = Vec::new();
+    for (index, arg) in env::args().enumerate() {
+        match index {
+            0 => (),
+            1 => coins = i32::from_str(&arg).expect("Error parse."),
+            _ => {
+                ret += 1;
+                let cost: i32 = i32::from_str(&arg).expect("Error parse.");
+                costs.push(cost);
+            }
+        }
+    }
+
+    if 0 == ret {
+        println!("Require at least 2 parameters.");
+        return;
+    }
+
+    println!("Max ice cream: {}", Solution::max_ice_cream(costs, coins));
+}