# include<bits/stdc++.h>
using namespace std;
int main()
{
    int n;
    cin>>n;
    int a,b,c;
    if(n%10==7||n/100==7||(n-(n/100*100))/10==7)
        cout<<"Yes"<<endl;
    else
        cout<<"No"<<endl;
    return 0;
}
