codeforces 448 A. Rewards

[code]#include <iostream>
#include <cstdio>
using namespace std;

int main()
{
    int a[3];
    int b[3];
    int m;
    int suma=0,sumb=0;
    for(int i=0; i<3; i++)
        cin>>a[i],suma+=a[i];
    for(int i=0; i<3; i++)
        cin>>b[i],sumb+=b[i];
    cin>>m;
    if(suma%5==0)
        suma/=5;
    else
        suma=suma/5+1;
    if(sumb%10==0)
        sumb/=10;
    else
        sumb=sumb/10+1;
    //cout<<suma<<" "<<sumb<<endl;
    if(suma+sumb>m)
        puts("NO");
    else
        puts("YES");
    return 0;
}