# 谁是中间数？ - Who's in the Middle

## 这个题目直接调用函数sort（）就好了，快速解决问题

Posted by isheng on July 18, 2016

## 中间数的判断之sort函数使用

### 原题题目

Time Limit:1000MS Memory Limit:32768KB 64bit IO Format:%I64d & %I64u

### Description

FJ is surveying his herd to find the most average cow. He wants to know how much milk this ‘median’ cow gives: half of the cows give as much or more than the median; half give as much or less.

Given an odd number of cows N (1 <= N < 10,000) and their milk output (1..1,000,000), find the median amount of milk given such that at least half the cows give the same amount of milk or more and at least half give the same or less.

#### Input

• Line 1: A single integer N

• Lines 2..N+1: Each line contains a single integer that is the milk output of one cow.

#### Output

• Line 1: A single integer that is the median milk output.

5

2

4

1

3

5

3

#### Hint

INPUT DETAILS: Five cows with milk outputs of 1..5 OUTPUT DETAILS: 1 and 2 are below 3; 4 and 5 are above 3.

### 我的代码

#include <iostream>
#include <algorithm>//sort函数的头文件
#include <cstdio>

using namespace std;

int w2tgGa[10001];

int main(){
int g;
//    freopen("in.txt", "r", stdin);
while(cin>>g){
for (int i = 0; i < g; ++i)
cin>>w2tgGa[i];
sort(w2tgGa,w2tgGa + g);//使用sort函数排序
cout << w2tgGa[(g-1) / 2] << endl;
}
}

Conding是一件有趣的事情！

markdown数学公式MathJax测试 $x=\frac{-b\pm\sqrt{b^2-4ac}}{2a}$