#include<stdio.h>

int potencija(int x,int y)
{
    int i;
    int pot=1;
    for(i=1;i<=y;i++)
         pot=pot*x;
    return pot;
}
int suma(int a)
{
      int s=0, i;
      for (i=1;i<=a;i++)
        s=s+potencija(i,i);
      return s;
}
int main()
{
    int n;
    printf("Unesi n ");
    scanf("%d",&n);
    if (n<=0)
       printf("Nije definirano");
    else
        printf("s=%d",suma(n));
    return 0;
}