func_code_string: #include <bits/stdc++.h>   using namespace std;   const int OHT = 100100;   const int MAXINF = (2 << 26);   const int MININF = (~(2 << 26));   int vis1[110], vis2[110];   int main() {     int n, m, i, j;     cin >> n >> m;     vector<pair<int, int> > v;     for (i = 2; i <= n; i++) v.push_back(make_pair(i, 1));     for (j = 1; j <= m; j++) v.push_back(make_pair(1, j));     cout << v.size() << endl;     for (i = 0; i < v.size(); i++)       cout << v[i].first <<     << v[i].second << endl;     return 0;   }   