题目描述

blablabla

样例

#include<iostream>
#include<cstring>
#include<algorithm>
using namespace std;
int h,m;
bool f(int t){
    long long a = -6 * t * t * t * t + h * t * t * t + 2 * t* t + t;
    if(a <= 0) return true;
    else{
        return false;
    }
}
int main(){

    cin >> h >> m;
    for(int i = 1; i <= m; i ++ ){
        if(f(i)){
            cout << "The balloon first touches ground at hour:" << endl;
            cout << i << endl;
            return 0;
        }
    }
    cout << "The balloon does not touch ground in the given time.";
    return 0;
}

算法1

(暴力枚举) $O(n^2)$

blablabla

时间复杂度

参考文献

C++ 代码

blablabla

算法2

(暴力枚举) $O(n^2)$

blablabla

时间复杂度

参考文献

C++ 代码

blablabla