USACO Bronze 2016 January - Subsequences Summing to Sevens

C++

Implementation

#include <bits/stdc++.h>

using namespace std;

int main(){
	freopen("div7.in", "r", stdin);
	freopen("div7.out", "w", stdout);
	int n;
	cin >> n;
	vector<int> pref(n+1);