#include <cstdio> #include <iostream> #include <vector> using namespace std; int main(){ int n,m; cin >> n >> m; cout<<n+m-1<<endl; for(int i = 1; i <= m ; i ++) cout<<1<<" "<<i<<endl; for(int i = 2; i <= n; i ++ ) cout<<i<<" "<<m<<endl; return 0; }
#include <cstdio> #include <iostream> #include <vector> using namespace std; int main(){ int n,m; cin >> n >> m; cout<<n+m-1<<endl; for(int i = 1; i <= m ; i ++) cout<<1<<" "<<i<<endl; for(int i = 2; i <= n; i ++ ) cout<<i<<" "<<m<<endl; return 0; }