Submission #1407803

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Source Code Expand

#include<bits/stdc++.h>

using namespace std;
using ll = long long;
using ld = long double;
#define rep(i,n) for(int i=0;i<(int)(n);i++)
#define reps(i,s,n) for(int i=(int)(s);i<(int)(n);i++)
#define allsort(v) sort(v.begin(),v.end())
const ll mod = 1e9 + 7;
const int inf = 1e9;

int main() {
	cin.sync_with_stdio(false);
	ll x;
	cin >> x;
	ll y = x%11;
	if (y == 0)cout << x / 11 * 2 << endl;
	else cout << (y <= 6 ? x / 11*2 + 1 : x / 11*2 + 2) << endl;
	return 0;
}

Submission Info

Judge Result