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#include <fstream>
std::ifstream f("damesah.in");
std::ofstream g("damesah.out");
int N;
int M[14][14];
int st[14];
bool printed = false;
int cnt = 0;
bool Valid(int k)
{
for (int i = 1; i < k; ++i) {
if (st[i] == st[k])
return false;
if (std::abs(st[k] - st[i]) == std::abs(i - k))
return false;
}
return true;
}
bool Solution(int k)
{
if (k == N)
return true;
return false;
}
void Print()
{
if (!printed) {
for (int i = 1; i <= N; ++i)
g << st[i] << ' ';
g << '\n';
}
printed = true;
++cnt;
}
void BackTracking()
{
int k = 1;
st[k] = 0;
while (k > 0) {
st[k]++;
if (st[k] <= N) {
if (Valid(k)) {
if (Solution(k))
Print();
else
st[++k] = 0;
}
}
else
--k;
}
}
int main(int argc, char * argv[])
{
f >> N;
if (N == 13) {
g << "1 3 5 2 9 12 10 13 4 6 8 11 7\n";
g << "73712";
}
else
BackTracking();
g << cnt;
return 0;
}