Rightmost Digit

#include<cstdio>
int powermod(int a,int b,int c)
{
    int ans=1;
    a=a%c;
    if(a==0)
    return 0;
    while(b>0)
    {
        if(b%2==1)
        ans=ans*a%c;
        b/=2;
        a=a*a%c;
    }
    return ans;
}
int main()
{
    int T;
    int n;
    scanf("%d",&T);
    while(T--)
    {
        scanf("%d",&n);
        printf("%d\n",powermod(n,n,10));
    }
    return 0;
}