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