Help me in solving PLAYFIT problem . Why this code is not passing any test case. Help me out

help
,
1

My issue

This code is passing on online complier when I input values manulally

cook your dish here

t=int(input())
while t>0:
t=t-1
num=int(input())
lst2=
lst=list(map(int,input().split()))

#print(type(lst))
l=len(lst)
count=0
diff=0

if l<num:
   print("UNFIT")
else: 
   for i in range(l-1):
        if lst[i+1]-lst[i]>0:
          diff=lst[i+1]-lst[i]
          
          count=count+1
          if diff>0:
              lst2.append(diff)
   if count==0:
          print("UNFIT")
   else:
          print(max(lst2))

why this code not passing the test case

My code

# cook your dish here
t=int(input())
while t>0:
    t=t-1
    num=int(input())
    lst2=[]
    lst=list(map(int,input().split()))
    
    #print(type(lst))
    l=len(lst)
    count=0
    diff=0
    
    if l<num:
       print("UNFIT")
    else: 
       for i in range(l-1):
            if lst[i+1]-lst[i]>0:
              diff=lst[i+1]-lst[i]
              
              count=count+1
              if diff>0:
                  lst2.append(diff)
       if count==0:
              print("UNFIT")
       else:
              print(max(lst2))

Problem Link: Fit to Play Practice Coding Problem

2

@code_dump
plzz refer my c++ code

#include <bits/stdc++.h>
using namespace std;

int main() {
	// your code goes here
	int t;
	cin>>t;
	while(t--)
	{
	    int n;
	    cin>>n;
	    int a[n];
	    int mn=INT_MAX;
	    int ans=0;
	    for(int i=0;i<n;i++)
	    {
	        cin>>a[i];
	        mn=min(mn,a[i]);
	        ans=max(ans,a[i]-mn);
	    }
	    if(ans==0)
	    {
	        cout<<"UNFIT\n";
	        continue;
	    }
	    cout<<ans<<endl;
	}
	return 0;
}