I am getting WA for test case 1.Can any one help me please?
this is my code.
#include<iostream>
long long int modulo(long long int b,long long int p,long long int n)
{
        long long int x=1,y=b;
        while(p){
                if(p&1){
                        x=(x*y)%n;
                }
                y=(y*y)%n;
                p/=2;
        }
        return (x%n);
}
int main(){
        long long int n,m,y;
        std::cin>>n>>m>>y;
        for(long long int x=0;x<m-1;x++)
                if(modulo(x,n,m)==y)
                        std::cout<<x<<" ";
        if(modulo(m-1,n,m)==y)
                std::cout<<m-1;
        puts("");
        return 0;
}

I have your same proble did you know the meaning of test#1?

Status:
input
......

output
-1