#include <bits/stdc++.h>
using namespace std;

    int land[1010][1010] = {}, n, m;
    int ans = 0, ansx[1010 * 1010] = {}, ansy[1010 * 1010] = {};
    /* 为啥上面这两行放在main函数里就运行不了,光标闪一下就请按任意键继续了, vscode, windows-gcc-x64, C/C++ Compile Run v1.0.28 */
    /* 但是luogu我交上去都AC诶 */
    
int main(){
    scanf("%d%d", &n, &m);
    for (int i = 1; i <= n; ++i){
        for (int j = 1; j <= m; ++j){
            scanf("%d", &land[i][j]);
        }
    }

    int t, xa, ya, xb, yb;
    scanf("%d", &t);
    while (t--){
        scanf("%d%d%d%d", &xa, &ya, &xb, &yb);
        swap(land[xa][ya], land[xb][yb]);
    }

    for (int i = 1; i <= n; ++i){
        for (int j = 1; j <= m; ++j){
            if (land[i][j] > land[i - 1][j] && land[i][j] > land[i + 1][j] && land[i][j] > land[i][j - 1] && land[i][j] > land[i][j + 1]){
                ++ans;
                ansx[ans] = i;
                ansy[ans] = j;
                /* 坐标先存着 */
            }
        }
    }
    printf("%d\n", ans);
    for (int i = 1; i <= ans; ++i){
        printf("%d %d\n", ansx[i], ansy[i]);
    }
    return 0;
}

如注释，我的环境：vscode, windows-gcc-x64。 装的扩展：C/C++ v1.13.9，C/C++ Compile Run v1.0.28，CodeLLDB v1.8.1 还有简中扩展包

下面两行我放在main函数里用C/C++ Compile Run运行，光标闪一下就“请按任意键继续”了；用vscode自己的“运行C/C++程序”就出来“找不到cygwin.S”这个文件，也没法跑

但是代码交到洛谷上是AC，请问问题出在哪qwq

int land[1010][1010] = {}, n, m;
int ans = 0, ansx[1010 * 1010] = {}, ansy[1010 * 1010] = {};