Help me in solving LARGESTK problem

help
,
1

My issue

can i covert the list in to set and return the len

My code

# cook your dish here
N=int(input())
for i in range(N):
    x=int(input())
    p=list(map(int,input().split()))
    y=set(p)
    print(len(y))

Problem Link: Largest K Practice Coding Problem

2

@vinaykumar2224
here plzz refer the following solution for better understanding

def main():
    t = int(input())
    for _ in range(t):
        n = int(input())
        a = list(map(int, input().split()))
        mp = {}
        
        for num in a:
            if num in mp:
                mp[num] += 1
            else:
                mp[num] = 1
        
        v = list(mp.values())
        v.sort(reverse=True)
        
        j = 0
        sm = 0
        ans = 0
        
        for i in range(1, len(mp) + 1):
            sm += v[j]
            ch = sm % i
            ans = max(ans, sm - ch)
            j += 1
        
        print(ans)

if __name__ == "__main__":
    main()
3

Thank u brooo