func_code_string: #include <bits/stdc++.h>   using namespace std;   const int N = 2e5 + 10;   int n, m, f[N];   bool vis[2][N];   vector<int> edges[2][N];   void dfs0(int x) {     if (vis[0][x]) return;     vis[0][x] = 1;     for (int to : edges[0][x]) {       if (f[to] != 1) dfs0(to);     }   }   void dfs1(int x) {     if (vis[1][x]) return;     vis[1][x] = 1;     if (f[x] == 1) return;     for (int to : edges[1][x]) {       dfs1(to);     }   }   void solve() {     cin >> n >> m;     for (int i = 1; i <= n; ++i) {       cin >> f[i];     }     for (int i = 1; i <= m; ++i) {       int u, v;       cin >> u >> v;       edges[0][u].push_back(v);       edges[1][v].push_back(u);     }     for (int i = 1; i <= n; ++i) {       if (f[i] == 1) {         dfs0(i);       }       if (f[i] == 2) {         dfs1(i);       }     }     for (int i = 1; i <= n; ++i) {       cout << (vis[0][i] && vis[1][i]) <<    ;     }   }   int main() {     ios::sync_with_stdio(0);     int T = 1;     while (T--) {       solve();     }   }   