Pagini recente » Cod sursa (job #2225852) | Cod sursa (job #1871981) | Borderou de evaluare (job #2078354) | Borderou de evaluare (job #1755318) | Cod sursa (job #3342979)
#include <iostream>
#pragma GCC optimise("O3, Ofast, unroll-loops")
using namespace std;
const int NMAX = 15;
int solution[NMAX], cnt = 0;
void print_solution(int n){
for(int i = 1; i <= n; i++){
printf("%d ", solution[i]);
}
printf("\n");
}
bool check_columns(int line, int column){
for(int i = 1; i < line; i++)
if(solution[i] == column) return false;
return true;
}
bool check_diagonals(int line, int column){
for(int i = 1; i < line; i++){
if(abs(line - i) == abs(column - solution[i]))
return false;
}
return true;
}
void backtrack(int line, int n){
if(line == n + 1){
if(cnt == 0)
print_solution(n);
cnt++;
return;
}
for(int column = 1; column <= n; column++){
if(!check_columns(line, column)) continue;
if(!check_diagonals(line, column)) continue;
solution[line] = column;
backtrack(line + 1, n);
}
}
int main(){
freopen("damesah.in", "r", stdin);
freopen("damesah.out", "w", stdout);
int n;
scanf("%d", &n);
backtrack(1, n);
printf("%d", cnt);
return 0;
}