20240817 Finished

src/problem/mod.rs

@@ -207,3 +207,4 @@ mod p123_best_time_to_buy_and_sell_stock_iii;
 mod p188_best_time_to_buy_and_sell_stock_iv;
 mod p221_maximal_square;
 mod p3117_minimum_sum_of_values_by_dividing_array;
+mod p3137_minimum_number_of_operations_to_make_word_k_periodic;

src/problem/p3137_minimum_number_of_operations_to_make_word_k_periodic.rs

@@ -0,0 +1,41 @@
+/**
+ * [3137] Minimum Number of Operations to Make Word K-Periodic
+ */
+pub struct Solution {}
+
+
+// submission codes start here
+use std::collections::HashMap;
+
+impl Solution {
+    pub fn minimum_operations_to_make_k_periodic(word: String, k: i32) -> i32 {
+        let mut map = HashMap::new();
+        let mut result = i32::MAX;
+        let n = word.len();
+        let k = k as usize;
+
+        for i in (0..n).step_by(k) {
+            let key = &word[i..i + k];
+
+            let entry = map.entry(key).or_insert(0);
+            *entry += 1;
+
+            result = result.min((n / k) as i32 - *entry);
+        }
+        
+
+        result
+    }
+}
+
+// submission codes end
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn test_3137() {
+        assert_eq!(1, Solution::minimum_operations_to_make_k_periodic("leetcodeleet".to_owned(), 4));
+    }
+}