/
一般采用多两位保证精度
/
include[HTML_REMOVED]
include[HTML_REMOVED]
include[HTML_REMOVED]
include[HTML_REMOVED]
using namespace std;
int main(){
double x;
cin>>x;
double l = -10000, r = 10000;
double mid;
while(r - l >1e-8){
mid = (l+r)/2;
if(mid * mid * mid > x) r = mid;
else l = mid;
}
printf(“%.6lf”,r);
}