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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); cout.tie(0)
  4. #define int long long
  5. #define endl '\n'
  6.  
  7. void solve(){
  8.     int n,m;
  9.     cin>>n>>m;
  10.     cout<<n+m-1<<endl;
  11.     int i=1,j=1;
  12.     while(i!=n || j!=m){
  13.     	cout<<i<<" "<<j<<endl;
  14.     	j++;
  15.     	if (j==m) break;
  16.     	cout<<i<<" "<<j<<endl;
  17.     	i++;
  18.  
  19.     }
  20.     cout<<n<<" "<<m<<endl;
  21.  
  22. }
  23.  
  24.  
  25. int32_t main(){
  26.     fast_io;
  27.     int t=1;
  28.  
  29.     while(t--) solve();
  30.     return 0;
  31. }
  32.  
Success #stdin #stdout 0.01s 5288KB
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https://ideone.com/mihQOC
language:
C++ (gcc 8.3)
created:
2 days ago
visibility:
public

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