func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     int m, n;     cin >> m >> n;     cout << min(m, n) + 1 << endl;     for (int i = 0; i <= min(m, n); i++) {       cout << i <<     << (min(m, n) - i) << endl;     }   }   