点1,5WA

#include<bits/stdc++.h>
using namespace std;
long long n,ans,bm;
int main(){
    cin>>n;
    if(!(n<11))
        bm=n%11,n-=bm,ans+=n/11,n=bm;
    if(!(n<5))
        bm=n%5,n-=bm,ans+=n/5,n=bm;
    ans+=n;
    cout<<ans;
    return 0;
}