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33 lines
566 B
33 lines
566 B
#include <bits/stdc++.h>
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using namespace std;
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const int N = 10;
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int n;
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int a[N], al;
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bool st[N];
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void dfs(int u) {
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// 如果到达了终点
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if (u == n + 1) {
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for (int i = 0; i < n; i++)
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printf("%d ", a[i]);
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puts("");
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return;
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}
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for (int i = 1; i <= n; i++)
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if (!st[i]) {
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a[al++] = i;
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st[i] = true;
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dfs(u + 1);
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st[i] = false;
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al--;
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}
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}
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int main() {
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cin >> n;
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// 开始
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dfs(1);
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return 0;
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}
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