903A Hungry Student Problem codeforces solution by
ujjal roy
#include<bits/stdc++.h>
using namespace std;
main()
{
int t,x,temp;
cin>>t;
while(t--)
{ int c=0;
cin>>x;
if(x%3==0||x%7==0) cout<<"YES"<<endl;
else
{
while(1)
{ temp=x;
x-=3;
temp-=7;
if(x<=0&&temp<=0) break;
if((x>0&&temp>0)&&(x%7==0||temp%3==0))
{
cout<<"YES"<<endl;
c=1;
break;
}
}
if(c==0)cout<<"NO"<<endl;
}
}
return 0;
}
0 Comments