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41 lines
747 B
41 lines
747 B
#include <bits/stdc++.h>
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using namespace std;
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int n, k;
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const int N = 110;
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int a[N];
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bool st[N];
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vector<int> res;
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/*
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4 2
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1 1 2 3
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*/
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void dfs(int u, int k) {
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if (k == 0) {
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for (int i = 0; i < res.size(); i++)
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cout << res[i] << " ";
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cout << endl;
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return;
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}
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if (u == n + 1) return;
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if (a[u - 1] == a[u] && st[a[u - 1]] == 0) {
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dfs(u + 1, k);
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} else {
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st[a[u]] = 1;
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res.push_back(a[u]);
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dfs(u + 1, k - 1);
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res.pop_back();
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st[a[u]] = 0;
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dfs(u + 1, k);
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}
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}
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int main() {
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cin >> n >> k;
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for (int i = 1; i <= n; i++) cin >> a[i];
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sort(a + 1, a + 1 + n);
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dfs(1, k);
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return 0;
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}
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