zoj 2486 Power of Cryptography

#include<stdio.h>#include<string.h>#include<stdlib.h>#include<math.h>int main(){    int n;    char p[102];    while (scanf("%d %s", &n, p) != EOF)    {        int power = strlen(p) - 1;        double d = 0, factor = 1;        int i;        for (i = 0; i < 30 && p[i] != ''; i++)        { d += (p[i] - '0') / factor; factor *= 10;        }        double pro = (pow(10, (log10(d) + power) / n));        printf("%dn", (int) (pro + 0.5));    }    return 0;}