func_code_string: #include <bits/stdc++.h>   using namespace std;   int n, m, T;   int l[200010], r[200010], s[200010], t[200010], id[200010];   int f[1010][1010];   int ans[200010];   int x[200010], y[200010];   inline int cmp(int x, int y) { return l[x] > l[y]; }   int main() {     scanf( %d%d%d , &n, &m, &T);     for (int i = 1; i <= m; i++) scanf( %d%d , &x[i], &y[i]);     for (int i = 1; i <= T; i++)       scanf( %d%d%d%d , &l[i], &r[i], &s[i], &t[i]), id[i] = i;     sort(id + 1, id + T + 1, cmp);     memset(f, 63, sizeof(f));     int last = 1;     for (int i = m; i; i--) {       f[x[i]][y[i]] = f[y[i]][x[i]] = i;       for (int j = 1; j <= n; j++) {         f[x[i]][j] = min(f[x[i]][j], f[y[i]][j]);         f[y[i]][j] = min(f[y[i]][j], f[x[i]][j]);       }       while (last <= T && l[id[last]] == i) {         int u = id[last++];         ans[u] = f[s[u]][t[u]] <= r[u];       }     }     for (int i = 1; i <= T; i++) puts(ans[i] ?  Yes  :  No );   }   