Problem p02936 (python)

Fixed submission:
#
# Yet I'm feeling like
# 	There is no better place than right by your side
# 		I had a little taste
# 			And I'll only spoil the party anyway
# 				'Cause all the girls are looking fine
# 					But you're the only one on my mind


import sys
#import re
# inf = float("inf")
sys.setrecursionlimit(10000000)

# abc='abcdefghijklmnopqrstuvwxyz'
# abd={'a': 0, 'b': 1, 'c': 2, 'd': 3, 'e': 4, 'f': 5, 'g': 6, 'h': 7, 'i': 8, 'j': 9, 'k': 10, 'l': 11, 'm': 12, 'n': 13, 'o': 14, 'p': 15, 'q': 16, 'r': 17, 's': 18, 't': 19, 'u': 20, 'v': 21, 'w': 22, 'x': 23, 'y': 24, 'z': 25}
# mod,MOD=1000000007,998244353
# vow=['a','e','i','o','u']
# dx,dy=[-1,1,0,0],[0,0,1,-1]

# from cmath import sqrt
from collections import deque, Counter, OrderedDict,defaultdict
from heapq import nsmallest, nlargest, heapify,heappop ,heappush, heapreplace
# from math import ceil,floor,log,sqrt,factorial,pow,pi,gcd,log10,atan,tan
# from bisect import bisect_left,bisect_right
# import numpy as np

def dfs(curr,parent):
    visited[curr]=True
    value[curr]+=value[parent]
    for i in mydict[curr]:
        if not visited[i]:
            dfs(i,curr)


def get_array(): return list(map(int , sys.stdin.readline().strip().split()))
def get_ints(): return map(int, sys.stdin.readline().strip().split())
def input(): return sys.stdin.readline().strip()

n,q=get_ints()
mydict=defaultdict(list)
parent=[0]*(n+1)
for i in range(n-1):
    a,b=get_ints()
    mydict[a].append(b)
    parent[b]=a

value=[0]*(n+1)
while q>0:
    index,score=get_ints()
    value[index]+=score
    q-=1

visited=[False]*(n+1)
dfs(1,0)

print(*value[1:])

Buggy submission (verdict: Runtime Error):
#
# Yet I'm feeling like
# 	There is no better place than right by your side
# 		I had a little taste
# 			And I'll only spoil the party anyway
# 				'Cause all the girls are looking fine
# 					But you're the only one on my mind


import sys
import re
# inf = float("inf")
#sys.setrecursionlimit(1000000)

# abc='abcdefghijklmnopqrstuvwxyz'
# abd={'a': 0, 'b': 1, 'c': 2, 'd': 3, 'e': 4, 'f': 5, 'g': 6, 'h': 7, 'i': 8, 'j': 9, 'k': 10, 'l': 11, 'm': 12, 'n': 13, 'o': 14, 'p': 15, 'q': 16, 'r': 17, 's': 18, 't': 19, 'u': 20, 'v': 21, 'w': 22, 'x': 23, 'y': 24, 'z': 25}
# mod,MOD=1000000007,998244353
# vow=['a','e','i','o','u']
# dx,dy=[-1,1,0,0],[0,0,1,-1]

# from cmath import sqrt
from collections import deque, Counter, OrderedDict,defaultdict
from heapq import nsmallest, nlargest, heapify,heappop ,heappush, heapreplace
# from math import ceil,floor,log,sqrt,factorial,pow,pi,gcd,log10,atan,tan
# from bisect import bisect_left,bisect_right
# import numpy as np

def dfs(curr,parent):
    visited[curr]=True
    value[curr]+=value[parent]
    for i in mydict[curr]:
        if not visited[i]:
            dfs(i,curr)


def get_array(): return list(map(int , sys.stdin.readline().strip().split()))
def get_ints(): return map(int, sys.stdin.readline().strip().split())
def input(): return sys.stdin.readline().strip()

n,q=get_ints()
mydict=defaultdict(list)
parent=[0]*(n+1)
for i in range(n-1):
    a,b=get_ints()
    mydict[a].append(b)
    parent[b]=a

value=[0]*(n+1)
while q>0:
    index,score=get_ints()
    value[index]+=score
    q-=1

visited=[False]*(n+1)
dfs(1,0)

print(*value[1:])