题解

#include<iostream>
using namespace std;
int main(){
int a,b,c;
cin>>a;
for(int i=1;i<=a;i++){
cin>>b;
c=0;
while(b!=0){
c=c+b%10;
b=b/10;
}
if(c%7==0){
cout<<"Yes"<<endl;
}
else{
cout<<"No"<<endl;
}
}
return 0;
}