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#include <bits/stdc++.h>
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using namespace std;
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int a[] = {1, 4, 6, 5, 3, 2, 1};
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int main() {
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next_permutation(a, a + 7);
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for (int i = 0; i < 7; i++)
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cout << a[i] << " ";
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// 答案：1 5 1 2 3 4 6
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return 0;
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}
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