Why do i get wrong answer for question WGTNUM ? https://www.codechef.com/APRIL18B/problems/WGHTNUM

#include
#include <math.h>
using namespace std;

int main() {
// your code goes here
int t;
cin>>t;long long int n;int w;long long int bet_combi;
while(t–)
{
cin>>n>>w;
long long int bet=n-2;
//cout<<bet<<endl;
bet_combi=pow(10,bet);
//cout<<bet_combi<<endl;

    long long int count=0;
    if(w>=0){
        
        count=9-abs(w);
   
    }
    else
    {
       count=10-abs(w);
    }
    
    long long int tot;
    
    tot=bet_combi*count;
    //cout<<tot<<endl;
    
    cout<<(tot%(10^9 + 7))<<endl ;
    
    
    
}
return 0;

}

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