HDU 2071 Max Num

http://acm.hdu.edu.cn/showproblem.php?pid=2071

Problem Description

There are some students in a class, Can you help teacher find the highest student .

 

Input

There are some cases. The first line contains an integer t, indicate the cases; Each case have an integer n ( 1 ≤ n ≤ 100 ) , followed n students’ height.

 

Output

For each case output the highest height, the height to two decimal plases;

 

Sample Input

2

3 170.00 165.00 180.00

4 165.00 182.00 172.00 160.00

 

Sample Output

180.00

182.00

 

代码：

#include <bits/stdc++.h>

using namespace std;
double a[111];
int main()
{
    int M;
    cin>>M;
    for(int i=1;i<=M;i++)
    {
       int n;
       cin>>n;
       for(int i=1;i<=n;i++)
       {
           cin>>a[i];
           for(int j=i;j>=2;j--)
           {
               if(a[j]<=a[j-1])
                swap(a[j],a[j-1]);
           }
       }
       for(int i=1;i<=n;i++)
       {
           if(i==n)
           printf("%.2f
",a[n]);
       }
    }
    return 0;
}