problems(rs): add “1431. Kids With the Greatest Number of Candies”

Signed-off-by: Matej Focko <mfocko@redhat.com>

problems/kids-with-the-greatest-number-of-candies.rs

@@ -0,0 +1,41 @@
+struct Solution {}
+impl Solution {
+    pub fn kids_with_candies(candies: Vec<i32>, extra_candies: i32) -> Vec<bool> {
+        let max = *candies.iter().max().unwrap();
+        candies
+            .iter()
+            .map(|candies| candies + extra_candies >= max)
+            .collect()
+    }
+}
+
+fn main() {}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn example_1() {
+        assert_eq!(
+            Solution::kids_with_candies(vec![2, 3, 5, 1, 3], 3),
+            vec![true, true, true, false, true]
+        );
+    }
+
+    #[test]
+    fn example_2() {
+        assert_eq!(
+            Solution::kids_with_candies(vec![4, 2, 1, 1, 2], 1),
+            vec![true, false, false, false, false]
+        );
+    }
+
+    #[test]
+    fn example_3() {
+        assert_eq!(
+            Solution::kids_with_candies(vec![12, 1, 12], 10),
+            vec![true, false, true]
+        );
+    }
+}