为什么暴力都wa？？

2023206/correct.cpp

@@ -1,33 +1,19 @@
 #include <stdio.h>
 int* stairs = NULL;
-bool* visited = NULL;
 int M, K, H;
 long long total = 0;
 
-int dfs(int start) {
-    if (visited[start]) {
-        return 0;
-    }
-    visited[start] = true;
-    for (int i = 1; start + i < M && i <= K; i++) {
-        if (((stairs[start + i] - stairs[start]) < 0 ? stairs[start] - stairs[start + i] : stairs[start + i] - stairs[start]) <= H) {
-            total++;
-            dfs(start + i);
-        }
-    }
-    return 0;
-}
-
 int main() {
     scanf("%d %d %d", &M , &K, &H);
     stairs = new int[M];
-    visited = new bool[M];
     for (int i = 0; i < M ; i++) {
         scanf("%d", &stairs[i]);
     }
     for (int i = 0; i < M; i++) {
-        if (!visited[i]) {
+        for (int j = i + 1; j <= i + K && j < M; j++) {
-            dfs(i);
+            if (stairs[j] <= stairs[i] + H && stairs[j] >= stairs[i] - H) {
+                total++;
+            }
         }
     }
     printf("%lld", total);