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  1. #include <bits/stdc++.h>
  2.  
  3. using namespace std;
  4.  
  5. int n;
  6. int x[100], cot[100], xuoi[100], nguoc[100];
  7. int cnt = 0;
  8.  
  9. void Try(int i){
  10.    for(int j = 1; j <= n; j++){
  11.       if(!cot[j] && !xuoi[i - j + n] && !nguoc[i + j - 1]){
  12.          x[i] = j;
  13.  
  14.          cot[j] = 1; xuoi[i - j + n] = 1; nguoc[i + j - 1] = 1;
  15.          if(i == n){
  16.             cnt++;
  17.          }
  18.          else{
  19.             Try(i + 1);
  20.          }
  21.          cot[j] = 0; xuoi[i - j + n] = 0; nguoc[i + j - 1] = 0;
  22.       }
  23.    }
  24. }
  25.  
  26. int main(){
  27.    int t; cin >> t;
  28.    while(t--){
  29.       cin >> n;
  30.       Try(1);
  31.       cout << cnt << endl;
  32.       cnt = 0;
  33.    }
  34. }
Success #stdin #stdout 0.06s 5296KB
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https://ideone.com/TNXpsI
language:
C++14 (gcc 8.3)
created:
5 days ago
visibility:
public

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