problem(rs): add “2141. Maximum Running Time of N Computers”

Signed-off-by: Matej Focko <me@mfocko.xyz>

problems/rs/maximum-running-time-of-n-computers.rs

@@ -0,0 +1,18 @@
+impl Solution {
+    pub fn max_run_time(n: i32, mut batteries: Vec<i32>) -> i64 {
+        batteries.sort();
+
+        let mut total = batteries.iter().map(|x| *x as u64).sum::<u64>();
+        let mut k: u64 = 0;
+
+        while *batteries.last().unwrap() as u64 > total / (n as u64 - k) {
+            total -= *batteries.last().unwrap() as u64;
+            batteries.pop();
+
+            k += 1;
+        }
+
+        (total / (n as u64 - k)) as i64
+    }
+}
+