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@surinoel
Created August 31, 2019 05:59
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#include <vector>
#include <iostream>
#include <algorithm>
using namespace std;
int n, m;
bool visit[9];
vector<int> num;
void go(int idx, int maxcnt, vector<int> v) {
if (maxcnt == m) {
for (int i = 0; i < v.size(); i++) {
cout << v[i] << ' ';
}
cout << '\n';
return;
}
for (int i = 0; i < n; i++) {
v.push_back(num[i]);
go(i, maxcnt + 1, v);
v.pop_back();
}
return;
}
int main(void) {
ios_base::sync_with_stdio(false);
cin.tie(nullptr);
cin >> n >> m;
num.resize(n);
for (int i = 0; i < n; i++) {
cin >> num[i];
}
sort(num.begin(), num.end());
go(0, 0, vector<int>());
return 0;
}
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