120%AC

#include<cstdio>
bool great_num(int n){
    int ans=0;
    while(n!=0){
        ans+=n%10;
        n/=10;
    }
    return(ans%7==0)?true:false;
}
int main(){
    int n,input;
    scanf("%d\n",&n);
    for(int i;i<n;i++){
        scanf("%d\n",&input);
        printf(great_num(input)?"Yes\n":"No\n");
    }
}