firstline=str(input()) happiness=0 arrset=set(input().split()) setA = set(input().split()) setB = set(input().split()) happiness += len(arrset.intersection(setA)) happiness -= len(arrset.intersection(setB)) print(happiness)

This is my code it works fine for three test cases when input gets highers i am not able to store all the values in my arrset that's your "sc_ar" set for example in input i give 1000 values and i dont know y my length of arrset is only 916 ! please help me by telling where i went wrong