RT

#include <bits/stdc++.h>
using namespace std;
int a[123456789],n,maxn=-1,main=10000; 
int main()
{
  cin>>n;
  for(int i=1;i<=n;++i)
  {
  	cin>>a[i];
  	if(a[i]>maxn)
  	{
  		maxn=a[i];
	  }
	if(a[i]<main)
	{
		main=a[i]; 
	}
  }
  cout<<maxn-main<<endl;
}

4 11 C:\Users\DELL\Desktop\的.cpp [Error] 'int main()' redeclared as different kind of symbol