20241106 finished.

src/problem/mod.rs

@@ -298,3 +298,5 @@ mod p638_shopping_offers;
 mod p633_sum_of_square_numbers;
 
 mod p3222_find_the_winning_player_in_coin_game;
+
+mod p3254_find_the_power_of_k_size_subarrays_i;

src/problem/p3254_find_the_power_of_k_size_subarrays_i.rs

@@ -0,0 +1,61 @@
+/**
+ * [3254] Find the Power of K-Size Subarrays I
+ */
+pub struct Solution {}
+
+// submission codes start here
+
+impl Solution {
+    pub fn results_array(nums: Vec<i32>, k: i32) -> Vec<i32> {
+        let k = k as usize;
+        let n = nums.len();
+
+        let mut count = 0;
+        for i in 0..(k - 1) {
+            if nums[i] + 1 == nums[i + 1] {
+                count += 1;
+            }
+        }
+
+        let mut result = Vec::with_capacity(n - k + 1);
+        result.push(if count == k - 1 { nums[k - 1] } else { -1 });
+
+        for i in k..n {
+            if nums[i - 1] + 1 == nums[i] {
+                count += 1;
+            }
+
+            if nums[i - k] + 1 == nums[i - k + 1] {
+                count -= 1;
+            }
+
+            result.push(if count == k - 1 { nums[i] } else { -1 });
+        }
+
+        result
+    }
+}
+
+// submission codes end
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn test_3254() {
+        assert_eq!(vec![1, 2, 3], Solution::results_array(vec![1, 2, 3], 1));
+        assert_eq!(
+            vec![3, 4, -1, -1, -1],
+            Solution::results_array(vec![1, 2, 3, 4, 3, 2, 5], 3)
+        );
+        assert_eq!(
+            vec![-1, -1],
+            Solution::results_array(vec![2, 2, 2, 2, 2], 4)
+        );
+        assert_eq!(
+            vec![-1, 3, -1, 3, -1],
+            Solution::results_array(vec![3, 2, 3, 2, 3, 2], 2)
+        );
+    }
+}