题解

#include<bits/stdc++.h>
using namespace std;
int main(){
    int n,a=0;
    cin>>n;
    int x[n+1];
    for(int i=1;i<=n;i++){
        int ans=0;
        cin>>x[i];
    	while(x[i]!=0){
        	a=x[i]%10;
            x[i]/=10;
            ans+=a;
        }
        if(ans%7==0){
        	cout<<"Yes"<<endl;
        }else{
        	cout<<"No"<<endl;
        }
    }
    return 0;
}