>>532

#include<stdio.h>

int main(void)
{
    const double eps = 10e-7;
    double cube = 10.0;
    double ans = 0.0;
    double level = 1.0;
    int i;
    
    while(level>=eps){
        for(i=1; i<=10; i++){
            double temp = ans+i*level;
            if(temp*temp*temp>cube){
                ans += (i-1)*level;
                level *= 0.1;
                break;
            }
        }
    }
    printf("x = %f\n",ans);
    
    return 0;    
}