Merge pull request #2957 from master-of-none/problem-523

Create: 0523-continuous-subarray-sum.rs

Author: felivalencia3

rust/0523-continuous-subarray-sum.rs

@@ -0,0 +1,22 @@
+use std::collections::HashMap;
+
+impl Solution {
+    pub fn check_subarray_sum(nums: Vec<i32>, k: i32) -> bool {
+        let mut hashmap: HashMap<i32, i32> = HashMap::new();
+        hashmap.insert(0, -1);
+        let mut sum = 0;
+
+        for (i, &num) in nums.iter().enumerate() {
+            sum += num;
+            if let Some(&prev_index) = hashmap.get(&(sum % k)) {
+                if i as i32 - prev_index >= 2 {
+                    return true;
+                }
+            } else {
+                hashmap.insert(sum % k, i as i32);
+            }
+        }
+
+        false
+    }
+}