#include <cstdio>
#include <math.h>
long long S,a[1000];
int main()
{
	int T,i;
	double j;
	FILE *intrare,*iesire;
	intrare=fopen("cifra.in","r");
	fscanf(intrare,"%d" , &T);
	for(i=0;i<=T;i++) fscanf(intrare,"%lld", &a[i]); 
	fclose(intrare);
	iesire=fopen("cifra.out","w");
	for(i=0;i<=T;i++)
	{	
		S=0;
	    for(j=0;j<=i;j++)
		{
			S=S+pow(j,j);
		}
		fprintf(iesire,"%d", S%10);
	}
	return 0;
}