func_code_string: #include <bits/stdc++.h>   using namespace std;   int n;   string col[1000];   int main() {     cin >> n >> col[0];     for (int i = 1; i < 1000; ++i) col[i] = col[0];     for (int i = 0, a, b; i < n; ++i) {       scanf( %d%d , &a, &b);       char now = col[0][i];       for (int j = b; j < 1000; j += a) {         now =  0  +  1  - now;         for (int t = j; t < min(1000, j + a); ++t) col[t][i] = now;       }     }     int ans = 0;     for (int i = 0; i < 1000; ++i)       ans = max(ans, (int)count(col[i].begin(), col[i].end(),  1 ));     printf( %d n , ans);   }   