func_code_string: #include <bits/stdc++.h>   using namespace std;   const int MAXN = 100 + 10;   int n, m;   int main() {     cin >> n >> m;     cout << n + m - 1 << endl;     cout <<  1 1  << endl;     for (int i = 2; i <= n; ++i) cout << i <<   1  << endl;     for (int i = 2; i <= m; ++i) cout <<  1   << i << endl;     fclose(stdin);     fclose(stdout);     return 0;   }   