next_permutation으로 5C3 구현하기

#include <iostream>
#include <vector>
 
using namespace std;
 
int main()
{ 
    ios_base::sync_with_stdio(false);
    cin.tie(0);
 
    int arr[5] = {0,0,0,1,1};
    do {
        for (int i = 0; i < 5; i++) {
            if (arr[i] == 0) cout << i+1 << ' ';
        }
        cout << '\n';
    } while(next_permutation(arr, arr+5));
 
    return 0;
}