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23 lines
362 B
23 lines
362 B
2 years ago
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#include <bits/stdc++.h>
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using namespace std;
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const int N = 110;
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int a[N], al, n;
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void dfs(int u) {
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if (u == n + 1) return;
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a[++al] = u;
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// 立即输出
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for (int i = 1; i <= al; i++) cout << a[i] << " ";
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cout << endl;
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dfs(u + 1);
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al--;
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dfs(u + 1);
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}
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int main() {
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cin >> n;
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dfs(1);
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return 0;
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}
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