AC043 in rust, finished all. (D doesn't get tested correctly locally)

atcoder/beginner_contests/abc043/src/bin/c.rs

@@ -0,0 +1,28 @@
+use proconio::input;
+
+fn cost(target: i32, numbers: &[i32]) -> i32 {
+    let mut result = 0;
+
+    for n in numbers {
+        result += (target - n) * (target - n)
+    }
+
+    result
+}
+
+fn main() {
+    input!{
+        n: i32,
+        a: [i32; n],
+    };
+
+    let mut min = std::i32::MAX;
+    for t in -100..=100 {
+        let r = cost(t, &a);
+        if r < min {
+            min = r;
+        }
+    }
+
+    println!("{}", {min});
+}