Output is right but no test case is passed;

#1

#include
using namespace std;

long long int octal(int n){
int sum = 0;
while(n>0){
int temp = n%8;

    sum = sum*10+temp;
    n = n/8;
 }
 return sum;

}

int main(){
long long int n;
cin>>n;
int ans = octal(n);
cout<<ans;

 return 0;

}
//here is code for converting decimal to octal

#2

hey Ankush, your code is wrong. it prints the reverse number
for input 15 the output should be 17 but your code gives me output 71