func_code_string: #include <bits/stdc++.h>   using namespace std;   const int maxN = 100 + 5;   const int mod = 1000 * 1000 * 1000 + 7;   const int maxM = 400000;   char a[102][102];   int c[maxN], cnt[maxN], p[maxN];   int main() {     ios::sync_with_stdio(0);     cin.tie();     srand(time(NULL));     int n;     cin >> n;     for (int i = 0; i < n; i++)       for (int j = 0; j < n; j++) cin >> a[i][j];     for (int i = 0; i < n; i++) cin >> c[i];     set<pair<int, int> > ss;     for (int i = 0; i < n; i++) ss.insert({c[i], i});     vector<int> ans;     while (ss.size()) {       while (ss.size() && ss.begin()->first < 0) ss.erase(ss.begin());       if (ss.size() == 0 || ss.begin()->first > 0) break;       auto it = *ss.begin();       int v = it.second;       ans.push_back(v);       for (int i = 0; i < n; i++)         if (a[v][i] ==  1  && c[i] >= 0) {           ss.erase({c[i], i});           c[i]--;           ss.insert({c[i], i});         }     }     cout << ans.size() << endl;     for (int i = 0; i < ans.size(); i++) cout << ans[i] + 1 <<    ;     cout << endl;     return 0;   }   