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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. #define int long long
  5.  
  6. void solve(){
  7.     int n,m;
  8.     cin >> n >> m;
  9.  
  10.     cout << n + m - 1 << "\n";
  11.  
  12.     int i = 1, j = 1;
  13.     cout << i << " " << j << "\n";
  14.  
  15.     while(i < n && j < m){
  16.         j++;               
  17.         cout << i << " " << j << "\n";
  18.         i++;               
  19.         cout << i << " " << j << "\n";
  20.     }
  21.  
  22.     while(i < n){         
  23.         i++;
  24.         cout << i << " " << j << "\n";
  25.     }
  26.  
  27.     while(j < m){         
  28.         j++;
  29.         cout << i << " " << j << "\n";
  30.     }
  31. }
  32.  
  33. int32_t main(){
  34.     fast_io;
  35.     solve();
  36.     return 0;
  37. }
  38.  
Success #stdin #stdout 0s 5320KB
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https://ideone.com/C7CYKk
language:
C++ (gcc 8.3)
created:
2 days ago
visibility:
public

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