#include <bits/stdc++.h> using namespace std; int n; int x[100], cot[100], xuoi[100], nguoc[100]; int cnt = 0; void Try(int i){ for(int j = 1; j <= n; j++){ if(!cot[j] && !xuoi[i - j + n] && !nguoc[i + j - 1]){ x[i] = j; cot[j] = 1; xuoi[i - j + n] = 1; nguoc[i + j - 1] = 1; if(i == n){ cnt++; } else{ Try(i + 1); } cot[j] = 0; xuoi[i - j + n] = 0; nguoc[i + j - 1] = 0; } } } int main(){ int t; cin >> t; while(t--){ cin >> n; Try(1); cout << cnt << endl; cnt = 0; } }
Standard input is empty
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