View Code of Problem 115

#include <stdio.h>
int main()
{
	int n,i,j,k;
	double sum1,sum2;
	while(scanf("%d",&n)!=EOF)
	{
		sum1=1,sum2=1,k=1;
		for(i=0;i<n;i++)
		{	
			if(i==0);
			else
			  k=k*2,
			  sum1+=k;		
		}
		printf("%.0lf %.0lf\n",sum1,sum2*N*n);
	}
	return 0;
}
/*
Main.c: In function 'main':
Main.c:16:36: error: 'N' undeclared (first use in this function)
   printf("%.0lf %.0lf\n",sum1,sum2*N*n);
                                    ^
Main.c:16:36: note: each undeclared identifier is reported only once for each function it appears in
Main.c:4:10: warning: unused variable 'j' [-Wunused-variable]
  int n,i,j,k;
          ^
*/