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#include "stdio.h"
int main()
{
int a, n, s, t;
printf("Please input a,n:\n");
scanf("%d%d", &a, &n);
if (n <= 0) {
printf("s= %d", 0);
return 0;
}
s = 0;
t = a;
//printf("%d + ", t);
while (n>1)
{
s = s + t;
t = (t * 10) + a;
//printf("%d + ", t);
n--;
}
s += t;
//printf("%d\n", t);
printf("s=%d", s);
return 0;
}