zoj 2277 The Gate to Freedom

            N^N = X

  --->    Nlog10(N) = log10( X )

 ---->    X的最高位为 Nlog10(N) 小数部分的第一个非0位

      

#include<stdio.h>#include<math.h>int main(void){double n;while(scanf("%lf",&n) != EOF){n = n*log10(n);n = n - (long long int)n;n = pow(10,n);while((int)n == 0)n *= 10;printf("%d\n",(int)n);}return 0;}