Problem p02936 (python)

Fixed submission:
import sys

n, q = map(int, sys.stdin.readline().split())
g = [[] for i in range(n)]
for i in range(n - 1):
    a, b = map(int, sys.stdin.readline().split())
    a -= 1
    b -= 1
    g[a].append(b)
    g[b].append(a)
xs = [0 for _ in range(n)]
for i in range(q):
    p, x = map(int, sys.stdin.readline().split())
    p -= 1
    xs[p] += x

visited = [False for _ in range(n)]
# def rec(prev_v, v, value):
#     if visited[v]:
#         return
#     visited[v] = True
#     next_value = value + xs[v]
#     costs[v] = next_value
#     for next_v in g[v]:
#         if next_v == prev_v:
#             continue
#         rec(v, next_v, next_value)
# rec(-1, 0, 0)

current_node = [0]
while len(current_node) > 0:
    next_node = []
    for v in current_node:
        visited[v] = True
        for next_v in g[v]:
            if visited[next_v]:
                continue
            next_node.append(next_v)
            xs[next_v] += xs[v]
    current_node = next_node

print(' '.join(map(str, xs)))

Buggy submission (verdict: Runtime Error):
import sys

n, q = map(int, sys.stdin.readline().split())
g = [[] for i in range(n)]
for i in range(n - 1):
    a, b = map(int, sys.stdin.readline().split())
    a -= 1
    b -= 1
    g[a].append(b)
    g[b].append(a)
xs = [0 for _ in range(n)]
for i in range(q):
    p, x = map(int, sys.stdin.readline().split())
    p -= 1
    xs[p] += x

costs = [0 for i in range(n)]
visited = [False for _ in range(n)]


def rec(prev_v, v, value):
    if visited[v]:
        return
    visited[v] = True
    next_value = value + xs[v]
    costs[v] = next_value
    for next_v in g[v]:
        if next_v == prev_v:
            continue
        rec(v, next_v, next_value)


rec(-1, 0, 0)
print(' '.join(map(str, costs)))

Buggy submission (verdict: Runtime Error):
import sys

n, q = map(int, sys.stdin)
g = [[] for i in range(n)]
for i in range(n - 1):
    a, b = map(int, sys.stdin)
    a -= 1
    b -= 1
    g[a].append(b)
    g[b].append(a)
xs = [0 for _ in range(n)]
for i in range(q):
    p, x = map(int, sys.stdin)
    p -= 1
    xs[p] += x

costs = [0 for i in range(n)]
visited = [False for _ in range(n)]


def rec(prev_v, v, value):
    if visited[v]:
        return
    visited[v] = True
    next_value = value + xs[v]
    costs[v] = next_value
    for next_v in g[v]:
        if next_v == prev_v:
            continue
        rec(v, next_v, next_value)


rec(-1, 0, 0)
print(' '.join(map(str, costs)))

Buggy submission (verdict: Runtime Error):
n, q = map(int, input().split())
g = [[] for i in range(n)]
for i in range(n - 1):
    a, b = map(int, input().split())
    a -= 1
    b -= 1
    g[a].append(b)
    g[b].append(a)
xs = [0 for _ in range(n)]
for i in range(q):
    p, x = map(int, input().split())
    p -= 1
    xs[p] += x

costs = [0 for i in range(n)]
visited = [False for _ in range(n)]


def rec(prev_v, v, value):
    if visited[v]:
        return
    visited[v] = True
    next_value = value + xs[v]
    costs[v] = next_value
    for next_v in g[v]:
        if next_v == prev_v:
            continue
        rec(v, next_v, next_value)


rec(-1, 0, 0)
print(' '.join(map(str, costs)))

Buggy submission (verdict: Runtime Error):
import sys

sys.setrecursionlimit(30000)

n, q = map(int, input().split())
g = [[] for i in range(n)]
for i in range(n - 1):
    a, b = map(int, input().split())
    a -= 1
    b -= 1
    g[a].append(b)
    g[b].append(a)
xs = [0 for _ in range(n)]
for i in range(q):
    p, x = map(int, input().split())
    p -= 1
    xs[p] += x

costs = [0 for i in range(n)]
visited = [False for _ in range(n)]


def rec(prev_v, v, value):
    if visited[v]:
        return
    visited[v] = True
    next_value = value + xs[v]
    costs[v] = next_value
    for next_v in g[v]:
        if next_v == prev_v:
            continue
        rec(v, next_v, next_value)


rec(-1, 0, 0)
print(' '.join(map(str, costs)))

Buggy submission (verdict: Runtime Error):
import sys

sys.setrecursionlimit(30000)

n, q = map(int, input().split())
g = [[] for i in range(n)]
for i in range(n - 1):
    a, b = map(int, input().split())
    a -= 1
    b -= 1
    g[a].append(b)
    g[b].append(a)
xs = [0 for _ in range(n)]
for i in range(q):
    p, x = map(int, input().split())
    p -= 1
    xs[p] += x

costs = [0 for i in range(n)]


def rec(prev_v, v, value):
    next_value = value + xs[v]
    costs[v] = next_value
    for next_v in g[v]:
        if next_v == prev_v:
            continue
        rec(v, next_v, next_value)


rec(-1, 0, 0)
print(' '.join(map(str, costs)))

Buggy submission (verdict: Runtime Error):
n, q = map(int, input().split())
g = [[] for i in range(n)]
for i in range(n - 1):
    a, b = map(int, input().split())
    a -= 1
    b -= 1
    g[a].append(b)
    g[b].append(a)
xs = [0 for _ in range(n)]
for i in range(q):
    p, x = map(int, input().split())
    p -= 1
    xs[p] += x

costs = [0 for i in range(n)]


def rec(prev_v, v, value):
    next_value = value + xs[v]
    costs[v] = next_value
    for next_v in g[v]:
        if next_v == prev_v:
            continue
        rec(v, next_v, next_value)


rec(-1, 0, 0)
print(' '.join(map(str, costs)))