#include <cstdio> #include <cstring> using namespace std; const int MAXN = 200001; int state[MAXN]; int main() { int T; scanf("%d", &T); while (T--) { int n, m, x, y; scanf("%d %d %d %d", &n, &m, &x, &y); // 重置状态数组,从 1 到 n for (int i = 1; i <= n...