c650

#include <iostream>
#include <vector>
#include <cstdio>

template <typename T>
void combination(std::vector<T>& vec, std::vector<T>& tmp, int start, int end, int idx, int r);

int main() {
	std::vector<unsigned int> vec = {1,2,3,4,5};
	std::vector<unsigned int> tmp(vec.size());