#include<stdio.h> int main()
#include<stdio.h>
int main()
{
long term=0,sum=0;
int a,i,n;
printf("Input a,n:");
scanf("%d,%d", &a, &n);
for(i=1; i<=n; i++)
{
term = term * 10 + a;
sum += term;
}
printf("sum=%ld\n",sum);
return 0;
}
