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Permutation.cpp

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#include <cstdio>

using namespace std;

int n, s[10], sp = 0;

bool ins[11];

void DFS()

{

if (sp == n)

{

for (int i = 0; i < sp; i++)

{

printf("%d ", s[i]);

}

printf("\n");

return;

}

for (int i = 1; i <= n; i++)

{

if (ins[i] == false)

{

ins[i] = true;

s[sp++] = i;

DFS();

ins[i] = false;

sp--;

}

}

}

int main()

{

scanf("%d", &n);

DFS();

return 0;

}