传送门--原题（数据点是对的）

我的代码（C++）：

#pragma GCC Optimize(3,"Ofast","inline")
#include<bits/stdtr1c++.h>
using namespace std;

const int N = 1e5 + 10;
int cxkatteck, a, b, c;
string s;

int main()
{
    cin >> s;
    
	for(int i = 0; i <= 0; i ++)
	{
		if (s[i] == '篮') a ++;
		if (s[i] == '荔') b ++;
		if (s[i] == '油') c ++;
		
	}
	cxkatteck = a + b + c;
	
	cout << a << " " << b << " " << c << endl << cxkatteck << endl;
	
	if(cxkatteck == 0){
		cout << "0.00" ;
		return 0;
	}
	
    double l = -100, r = 100;
    while (r - l > 1e-8)
    {
        double mid = (l + r) / 2;
        if (mid * mid * mid >= cxkatteck) r = mid;
        else l = mid;
    }

    printf("%.3lf\n", l);
    return 0;
}

求大佬查错！