func_code_string: #include <bits/stdc++.h>   using namespace std;   string sol;   const int kBufferSize = 10000;   int BufferInd = kBufferSize;   char Buffer[kBufferSize];   void cit(int &n) {     ((++BufferInd >= kBufferSize) ? (cin.read(Buffer, kBufferSize), BufferInd = 0)                                   : (0));     for (; not((((Buffer[BufferInd]) >=  0  and (Buffer[BufferInd]) <=  9 ) or                 (Buffer[BufferInd]) ==  - )                    ? (1)                    : (0));          ((++BufferInd >= kBufferSize)               ? (cin.read(Buffer, kBufferSize), BufferInd = 0)               : (0)))       ;     bool sign = false;     if ((Buffer[BufferInd]) ==  - ) {       ((++BufferInd >= kBufferSize)            ? (cin.read(Buffer, kBufferSize), BufferInd = 0)            : (0));       sign = true;     }     n = 0;     for (; ((((Buffer[BufferInd]) >=  0  and (Buffer[BufferInd]) <=  9 ) or              (Buffer[BufferInd]) ==  - )                 ? (1)                 : (0));          ((++BufferInd >= kBufferSize)               ? (cin.read(Buffer, kBufferSize), BufferInd = 0)               : (0))) {       n *= 10;       n += (Buffer[BufferInd]) -  0 ;     }     if (sign) n *= -1;   }   int main() {     std::ios_base::sync_with_stdio(false);     int n, sum = 0;     cin >> n;     for (int i = 1; i <= n; ++i)       for (int j = 1; j <= n; ++j) {         int x;         cin >> x;         if (i == j) sum ^= x;       }     int q;     cin >> q;     while (q--) {       int t;       cin >> t;       if (t == 1 or t == 2) {         int x;         cin >> x;         sum ^= 1;       } else {         sol +=  0  + sum;       }     }     cout << sol <<   n ;     return 0;   }   