소프티어

# DFS

def dfs1(current, parent):
    subtreeSize[current] = 1
    for i in range(len(node[current])):
        child = node[current][i][0]
        weight = node[current][i][1]
        if child != parent:
            dfs1(child, current)
            distSum[current] += distSum[child] + subtreeSize[child]*weight
            subtreeSize[current] += subtreeSize[child]
    return


def dfs2(current, parent):
    for i in range(len(node[current])):
        child = node[current][i][0]
        weight = node[current][i][1]
        if child != parent:
            distSum[child] = distSum[current] + weight*(n-2*subtreeSize[child])
            dfs2(child, current)
    return

n = int(input())
node = [[] for _ in range(n+1)]
subtreeSize = [0]*(n+1)
distSum = [0]*(n+1)

for i in range(n-1):
    x, y, t = map(int, input().split())
    node[x].append([y,t])
    node[y].append([x,t])
    
dfs1(1,1)
dfs2(1,1)

for i in range(1, n+1):
    print(distSum[i])

이건 답보고 썼는데

5개 정도 테스트 케이스가 런타임 에러가 납니다

어떤 부분이 잘못되었을가요?