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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3. #define fast_io ios::sync_with_stdio(0); cin.tie(0)
  4.  
  5. int main(){
  6.     fast_io;
  7.     long long n,m;
  8.     cin>>n>>m;
  9.  
  10.     cout << n + m - 1 << '\n';
  11.  
  12.     cout << 1 << " " << 1 << '\n';
  13.  
  14.     for(long long i = 2; i <= n; i++)
  15.         cout << i << " " << 1 << '\n';
  16.  
  17.     for(long long j = 2; j <= m; j++)
  18.         cout << n << " " << j << '\n';
  19.  
  20.     return 0;
  21. }
  22.  
Success #stdin #stdout 0.01s 5284KB
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stdout
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https://ideone.com/H9glYW
language:
C++ (gcc 8.3)
created:
2 days ago
visibility:
public

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