1835791_ac_15ms_36k.c

北大大牛代码 1240道题的原代码 超级权威

# include <stdio.h>
# include <math.h>
void main()
{
 int N, i, j, p, t;
 double result, str[101];
 scanf("%d",&N);
 for(i = 0; i < N; i++)
 scanf("%lf",&str[i]);
 for(i = 0; i < N - 1; i++)
 {
   p = i;
   for(j = i + 1; j < N; j++)
    if(str[p] < str[j]) 
       p = j;
       if(p != i)
       {
        t = str[i];
        str[i] = str[p];
        str[p] = t;
       }
 }
 for(i = 1; i < N; i++)
   str[i] = 2*sqrt(str[i]*str[i-1]);
   printf("%.3lf\n",str[N-1]);
}