Codechef not accepting my code

1

This is a beginner level program. program is to find the sum of first and last digit of the number. here is the link https://www.codechef.com/problems/FLOW004

my code:

#include<iostream>

using namespace std;

int main(){

  int N;

  int T;

  cin>>T;

  for(int i=0;i<T;i++){

    cin>>N;

    int a = N%10;

    while(N>10){

      N = N/10;

    }

    cout<<a+N<<"\n";

  }

}
2

Consider the test input:

1                                                       
10
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