from collections import defaultdict as dd
for _ in range(int(input())):
for i in range(n-1): a,b=map(int,input().split()) lis.append(a) lis.append(b)
no doubt it is giving wrong answer but the question is python pypy 3.5 is taking 2.8sec approx just to solve this ?
N=10^5 maximum so why these statements taking so much time ?
please explain someone