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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3.  
  4. int n,ans;
  5. bool col[12];
  6. bool cheo1[24];
  7. bool cheo2[24];
  8.  
  9. void quaylui(int hang){
  10.     if(hang > n){
  11.         ans++;
  12.         return;
  13.     }
  14.     for(int cot = 1; cot <= n; cot++){
  15.         if(!col[cot] && !cheo1[hang + cot] && !cheo2[hang - cot + n]){
  16.             col[cot]= true;
  17.             cheo1[hang + cot] = true;
  18.             cheo2[hang - cot + n] = true;
  19.  
  20.             quaylui(hang + 1);
  21.  
  22.             col[cot]= false;
  23.             cheo1[hang + cot] = false;
  24.             cheo2[hang - cot + n] = false;
  25.         }
  26.     }
  27. }
  28.  
  29. int main(){
  30.     cin >> n;
  31.     quaylui(1);
  32.     cout << ans;
  33. }
  34.  
Success #stdin #stdout 0s 5324KB
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https://ideone.com/JxFudl
language:
C++ (gcc 8.3)
created:
7 hours ago
visibility:
public

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