convert python to c++ online
from collections import Counter n = int(input()) x = [int(n) for n in input().split()] summ = sum(x)/n def getSums(myList,target): already_seen = Counter() pairs = [] temp = 0 k = 0 while k < len(myList): for _ in range(already_seen[target - myList[k]]): temp+=1 already_seen[myList[k]] += 1 k+=1 return temp print(getSums(x, summ*2))