求排错

#include "iostream"
#include "cstdio"
#include "cmath"
#include "cstring"
#include "algorithm"
#include "vector"
using namespace std;
int cmd(int a,int b){return a>b;}
int main()
{
  int n,m;
  cin>>n>>m;
  int a[105];
  for(int i=1;i<=n;i++)cin>>a[i];
  sort(a+1,a+1+n,cmd);
  for(int i=1;i<=n;i++)
  {
    m-=a[i];
    if(m<=0){
      cout<<i;
      return 0;
    }
  }
}

Cf:

 Can't compile file:
Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "23223.py", line 7
    using namespace std;
                  ^
SyntaxError: invalid syntax