题目描述

blablabla

样例

#include <iostream>
#include <cstdio>
#include <cmath>
using namespace std;
int main(){
    double a,b,c,d,y;
    double avery;
    cin>>a>>b>>c>>d;
    avery=(a*2+b*3+c*4+d*1)/10;
    printf("Media: %lf\n",avery);
    if(avery>=7.0)printf("Aluno aprovado.\n");
    else if(avery<=5.0)printf("Aluno reprovado.\n");
    else {
        printf("Aluno em exame.\n");
        cin>>y;
        printf("Nota do exame: %lf\n",y);
        avery=(avery+y)/2;
        if(avery>=5.0)printf("Aluno aprovado.\n");
        else printf("Aluno reprovado.\n");
        printf("Media final: %lf",avery);

    }

    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