Buggy python submission (verdict: Time Limit Exceeded):
# ABC138D - Ki
def dfs(r: int) -> None:
    stack = [(r, -1)]
    while stack:
        v, p = stack.pop(0)
        x = cnt[v]
        for u in T[v]:
            if u != p:
                cnt[u] += x
                stack.append((u, v))


def main():
    # Ai (A[i][0]) may be not a parent of Bi (A[i][1])
    global T, cnt
    N, Q, *A = map(int, open(0).read().split())
    E, P = A[: (N - 1) * 2], A[(N - 1) * 2 :]
    T = [[] for _ in range(N + 1)]
    for v, u in zip(*[iter(E)] * 2):
        T[v].append(u), T[u].append(v)
    cnt = [0] * (N + 1)
    for p, x in zip(*[iter(P)] * 2):
        cnt[p] += x  # increase vertex p by x
    dfs(1)
    print(*cnt[1:])


if __name__ == "__main__":
    main()

Fixed submission:
# ABC138D - Ki
import sys
input = sys.stdin.readline
sys.setrecursionlimit(10 ** 7)

def dfs(v, p, tree, cnt):
    for u in tree[v]:
        if u != p:
            cnt[u] += cnt[v]
            dfs(u, v, tree, cnt)


def main():
    N, Q = tuple(map(int, input().split()))
    A = tuple(tuple(map(int, input().split())) for _ in range(N - 1))
    P = tuple(tuple(map(int, input().split())) for _ in range(Q))
    T = [[] for _ in range(N + 1)]  # T[i] := children of vertex i
    cnt = [0] * (N + 1)
    for a, b in A:  # set tree relations
        T[a] += [b]
        T[b] += [a]
    for p, x in P:  # increment on roots
        cnt[p] += x
    dfs(1, -1, T, cnt)
    print(*cnt[1:])


if __name__ == "__main__":
    main()

Buggy python submission (verdict: Runtime Error):
# ABC138D - Ki
import sys

input = sys.stdin.readline
sys.setrecursionlimit(2 * 10 ** 5 + 2)


def dfs(v: int, p: int) -> None:
    x = cnt[v]
    for u in T[v]:
        if u != p:  # p: parent -> skip
            cnt[u] += x  # cumulative sum
            dfs(u, v)


def main():
    # Ai (A[i][0]) may be not a parent of Bi (A[i][1])
    global T, cnt
    N, Q = tuple(map(int, input().split()))  # vertices and queues
    E = tuple(tuple(map(int, input().split())) for _ in range(N - 1))
    P = tuple(tuple(map(int, input().split())) for _ in range(Q))
    T = [[] for _ in range(N + 1)]  # tree, N+1: 1-idx
    for a, b in E:
        T[a] += [b]
        T[b] += [a]
    cnt = [0] * (N + 1)
    for p, x in P:
        cnt[p] += x  # increase vertex p by x
    dfs(1, -1)
    print(*cnt[1:])


if __name__ == "__main__":
    main()

Fixed submission:
# ABC138D - Ki
import sys
input = sys.stdin.readline
sys.setrecursionlimit(10 ** 7)

def dfs(v, p, tree, cnt):
    for u in tree[v]:
        if u != p:
            cnt[u] += cnt[v]
            dfs(u, v, tree, cnt)


def main():
    N, Q = tuple(map(int, input().split()))
    A = tuple(tuple(map(int, input().split())) for _ in range(N - 1))
    P = tuple(tuple(map(int, input().split())) for _ in range(Q))
    T = [[] for _ in range(N + 1)]  # T[i] := children of vertex i
    cnt = [0] * (N + 1)
    for a, b in A:  # set tree relations
        T[a] += [b]
        T[b] += [a]
    for p, x in P:  # increment on roots
        cnt[p] += x
    dfs(1, -1, T, cnt)
    print(*cnt[1:])


if __name__ == "__main__":
    main()

Buggy python submission (verdict: Runtime Error):
# ABC138D - Ki
import sys

input = sys.stdin.readline
sys.setrecursionlimit(2 * 10 ** 5 + 2)


def dfs(v: int, p: int) -> None:
    x = cnt[v]
    for u in T[v]:
        if u != p:  # p: parent -> skip
            cnt[u] += x  # cumulative sum
            dfs(u, v)


def main():
    # Ai (A[i][0]) may be not a parent of Bi (A[i][1])
    global T, cnt
    N, Q = tuple(map(int, input().split()))  # vertices and queues
    E = tuple(tuple(map(int, input().split())) for _ in range(N - 1))
    P = tuple(tuple(map(int, input().split())) for _ in range(Q))
    T = [[] for _ in range(N + 1)]  # tree, N+1: 1-idx
    for a, b in E:
        T[a] += [b]
        T[b] += [a]
    cnt = [0] * (N + 1)
    for p, x in P:
        cnt[p] += x  # increase vertex p by x
    dfs(1, -1)
    print(*cnt[1:])


if __name__ == "__main__":
    main()

Fixed submission:
# ABC138D - Ki
import sys
input = sys.stdin.readline
sys.setrecursionlimit(10 ** 7)

def dfs(v, p, tree, cnt):
    for u in tree[v]:
        if u != p:
            cnt[u] += cnt[v]
            dfs(u, v, tree, cnt)


def main():
    N, Q = tuple(map(int, input().split()))
    A = tuple(tuple(map(int, input().split())) for _ in range(N - 1))
    P = tuple(tuple(map(int, input().split())) for _ in range(Q))
    T = [[] for _ in range(N + 1)]  # T[i] := children of vertex i
    cnt = [0] * (N + 1)
    for a, b in A:  # set tree relations
        T[a] += [b]
        T[b] += [a]
    for p, x in P:  # increment on roots
        cnt[p] += x
    dfs(1, -1, T, cnt)
    print(*cnt[1:])


if __name__ == "__main__":
    main()

Buggy python submission (verdict: Runtime Error):
# ABC138D - Ki
import sys

input = sys.stdin.readline
sys.setrecursionlimit(2 * 10 ** 5 + 1)


def dfs(v: int, p: int) -> None:
    x = cnt[v]
    for u in T[v]:
        if u != p:  # p: parent -> skip
            cnt[u] += x  # cumulative sum
            dfs(u, v)


def main():
    # Ai (A[i][0]) may be not a parent of Bi (A[i][1])
    global T, cnt
    N, Q = tuple(map(int, input().split()))  # vertices and queues
    E = tuple(tuple(map(int, input().split())) for _ in range(N - 1))
    P = tuple(tuple(map(int, input().split())) for _ in range(Q))
    T = [[] for _ in range(N + 1)]  # tree, N+1: 1-idx
    for a, b in E:
        T[a] += [b]
        T[b] += [a]
    cnt = [0] * (N + 1)
    for p, x in P:
        cnt[p] += x  # increase vertex p by x
    dfs(1, -1)
    print(*cnt[1:])


if __name__ == "__main__":
    main()

Fixed submission:
# ABC138D - Ki
import sys
input = sys.stdin.readline
sys.setrecursionlimit(10 ** 7)

def dfs(v, p, tree, cnt):
    for u in tree[v]:
        if u != p:
            cnt[u] += cnt[v]
            dfs(u, v, tree, cnt)


def main():
    N, Q = tuple(map(int, input().split()))
    A = tuple(tuple(map(int, input().split())) for _ in range(N - 1))
    P = tuple(tuple(map(int, input().split())) for _ in range(Q))
    T = [[] for _ in range(N + 1)]  # T[i] := children of vertex i
    cnt = [0] * (N + 1)
    for a, b in A:  # set tree relations
        T[a] += [b]
        T[b] += [a]
    for p, x in P:  # increment on roots
        cnt[p] += x
    dfs(1, -1, T, cnt)
    print(*cnt[1:])


if __name__ == "__main__":
    main()

Buggy python submission (verdict: Runtime Error):
# ABC138D - Ki
import sys

input = sys.stdin.readline
sys.setrecursionlimit(2 * 10 ** 5 + 1)


def dfs(v: int, p: int) -> None:
    x = cnt[v]
    for u in T[v]:
        if u != p:  # p: parent -> skip
            cnt[u] += x  # cumulative sum
            dfs(u, v)


def main():
    # Ai (A[i][0]) may be not a parent of Bi (A[i][1])
    global T, cnt
    N, Q = tuple(map(int, input().split()))  # vertices and queues
    E = tuple(tuple(map(int, input().split())) for _ in range(N - 1))
    P = tuple(tuple(map(int, input().split())) for _ in range(Q))
    T = [[] for _ in range(N + 1)]  # tree, N+1: 1-idx
    for a, b in E:
        T[a] += [b]
        T[b] += [a]
    cnt = [0] * (N + 1)
    for p, x in P:
        cnt[p] += x  # increase vertex p by x
    dfs(1, -1)
    print(*cnt[1:])


if __name__ == "__main__":
    main()

Fixed submission:
# ABC138D - Ki
import sys
input = sys.stdin.readline
sys.setrecursionlimit(10 ** 7)

def dfs(v, p, tree, cnt):
    for u in tree[v]:
        if u != p:
            cnt[u] += cnt[v]
            dfs(u, v, tree, cnt)


def main():
    N, Q = tuple(map(int, input().split()))
    A = tuple(tuple(map(int, input().split())) for _ in range(N - 1))
    P = tuple(tuple(map(int, input().split())) for _ in range(Q))
    T = [[] for _ in range(N + 1)]  # T[i] := children of vertex i
    cnt = [0] * (N + 1)
    for a, b in A:  # set tree relations
        T[a] += [b]
        T[b] += [a]
    for p, x in P:  # increment on roots
        cnt[p] += x
    dfs(1, -1, T, cnt)
    print(*cnt[1:])


if __name__ == "__main__":
    main()

Buggy python submission (verdict: Runtime Error):
# ABC138D - Ki
import sys

input = sys.stdin.readline
sys.setrecursionlimit(2 * 10 ** 5)


def dfs(v: int, p: int) -> None:
    x = cnt[v]
    for u in T[v]:
        if u != p:  # p: parent -> skip
            cnt[u] += x  # cumulative sum
            dfs(u, v)


def main():
    # Ai (A[i][0]) may be not a parent of Bi (A[i][1])
    global T, cnt
    N, Q = tuple(map(int, input().split()))  # vertices and queues
    E = tuple(tuple(map(int, input().split())) for _ in range(N - 1))
    P = tuple(tuple(map(int, input().split())) for _ in range(Q))
    T = [[] for _ in range(N + 1)]  # tree, N+1: 1-idx
    for a, b in E:
        T[a] += [b]
        T[b] += [a]
    cnt = [0] * (N + 1)
    for p, x in P:
        cnt[p] += x  # increase vertex p by x
    dfs(1, -1)
    print(*cnt[1:])


if __name__ == "__main__":
    main()

Fixed submission:
# ABC138D - Ki
import sys
input = sys.stdin.readline
sys.setrecursionlimit(10 ** 7)

def dfs(v, p, tree, cnt):
    for u in tree[v]:
        if u != p:
            cnt[u] += cnt[v]
            dfs(u, v, tree, cnt)


def main():
    N, Q = tuple(map(int, input().split()))
    A = tuple(tuple(map(int, input().split())) for _ in range(N - 1))
    P = tuple(tuple(map(int, input().split())) for _ in range(Q))
    T = [[] for _ in range(N + 1)]  # T[i] := children of vertex i
    cnt = [0] * (N + 1)
    for a, b in A:  # set tree relations
        T[a] += [b]
        T[b] += [a]
    for p, x in P:  # increment on roots
        cnt[p] += x
    dfs(1, -1, T, cnt)
    print(*cnt[1:])


if __name__ == "__main__":
    main()

Buggy python submission (verdict: Runtime Error):
# ABC138D - Ki (entirely global namespace)
import sys

input = sys.stdin.readline
sys.setrecursionlimit(10 ** 7)


def dfs(v: int, p: int) -> None:
    for u in T[v]:
        if u != p:  # p: parent -> skip
            cnt[u] += cnt[v]  # cumulative sum
            dfs(u, v)


# Ai (A[i][0]) may be not a parent of Bi (A[i][1])
N, Q = tuple(map(int, input().split()))  # vertices and queues
E = tuple(tuple(map(int, input().split())) for _ in range(N - 1))
P = tuple(tuple(map(int, input().split())) for _ in range(Q))
T = [[] for _ in range(N + 1)]  # tree, (N+1: 1-idx -> 0-idx)
for a, b in E:
    T[a] += [b]
    T[b] += [a]
cnt = [0] * (N + 1)
for p, x in P:
    cnt[p] += x  # increase vertex p by x
dfs(1, -1)
print(*cnt[1:])


if __name__ == "__main__":
    main()

Fixed submission:
# ABC138D - Ki
import sys
input = sys.stdin.readline
sys.setrecursionlimit(10 ** 7)

def dfs(v, p, tree, cnt):
    for u in tree[v]:
        if u != p:
            cnt[u] += cnt[v]
            dfs(u, v, tree, cnt)


def main():
    N, Q = tuple(map(int, input().split()))
    A = tuple(tuple(map(int, input().split())) for _ in range(N - 1))
    P = tuple(tuple(map(int, input().split())) for _ in range(Q))
    T = [[] for _ in range(N + 1)]  # T[i] := children of vertex i
    cnt = [0] * (N + 1)
    for a, b in A:  # set tree relations
        T[a] += [b]
        T[b] += [a]
    for p, x in P:  # increment on roots
        cnt[p] += x
    dfs(1, -1, T, cnt)
    print(*cnt[1:])


if __name__ == "__main__":
    main()

Buggy python submission (verdict: Time Limit Exceeded):
# ABC138D - Ki
import sys
input = sys.stdin.readline
sys.setrecursionlimit(10 ** 7)

def dfs(v, p, tree, cnt):
    for u in tree[v]:
        if u != p:
            cnt[u] += cnt[v]
            dfs(u, v, tree, cnt)


def main():
    # ai may be not a parent of bi. -> set a skip condition (p) in dfs
    N, Q = tuple(map(int, input().split()))
    A = tuple(tuple(map(int, input().split())) for _ in range(N - 1))
    P = tuple(tuple(map(int, input().split())) for _ in range(Q))
    T = [[] for _ in range(N + 1)]
    cnt = [0] * (N + 1)
    for a, b in A:  # set tree relations
        T[a] += [b]
        T[b] += [a]
    for p, x in P:  # increment on roots
        cnt[p] += x
    dfs(1, -1, T, cnt)
    print(*cnt[1:])


if __name__ == "__main__":
    main()

Fixed submission:
# ABC138D - Ki
import sys
input = sys.stdin.readline
sys.setrecursionlimit(10 ** 7)

def dfs(v, p, tree, cnt):
    for u in tree[v]:
        if u != p:
            cnt[u] += cnt[v]
            dfs(u, v, tree, cnt)


def main():
    N, Q = tuple(map(int, input().split()))
    A = tuple(tuple(map(int, input().split())) for _ in range(N - 1))
    P = tuple(tuple(map(int, input().split())) for _ in range(Q))
    T = [[] for _ in range(N + 1)]  # T[i] := children of vertex i
    cnt = [0] * (N + 1)
    for a, b in A:  # set tree relations
        T[a] += [b]
        T[b] += [a]
    for p, x in P:  # increment on roots
        cnt[p] += x
    dfs(1, -1, T, cnt)
    print(*cnt[1:])


if __name__ == "__main__":
    main()

Buggy python submission (verdict: Time Limit Exceeded):
# ABC138D - Ki
import sys
sys.setrecursionlimit(10 ** 7)

def dfs(v, p, tree, cnt):
    for u in tree[v]:
        if u != p:
            cnt[u] += cnt[v]
            dfs(u, v, tree, cnt)


def main():
    N, Q = tuple(map(int, input().split()))
    A = tuple(tuple(map(int, input().split())) for _ in range(N - 1))
    P = tuple(tuple(map(int, input().split())) for _ in range(Q))
    T = [[] for _ in range(N + 1)]  # T[i] := children of vertex i
    cnt = [0] * (N + 1)
    for a, b in A:  # set tree relations
        T[a] += [b]
        T[b] += [a]
    for p, x in P:  # increment on roots
        cnt[p] += x
    dfs(1, -1, T, cnt)
    print(*cnt[1:])


if __name__ == "__main__":
    main()

Fixed submission:
# ABC138D - Ki
import sys
input = sys.stdin.readline
sys.setrecursionlimit(10 ** 7)

def dfs(v, p, tree, cnt):
    for u in tree[v]:
        if u != p:
            cnt[u] += cnt[v]
            dfs(u, v, tree, cnt)


def main():
    N, Q = tuple(map(int, input().split()))
    A = tuple(tuple(map(int, input().split())) for _ in range(N - 1))
    P = tuple(tuple(map(int, input().split())) for _ in range(Q))
    T = [[] for _ in range(N + 1)]  # T[i] := children of vertex i
    cnt = [0] * (N + 1)
    for a, b in A:  # set tree relations
        T[a] += [b]
        T[b] += [a]
    for p, x in P:  # increment on roots
        cnt[p] += x
    dfs(1, -1, T, cnt)
    print(*cnt[1:])


if __name__ == "__main__":
    main()

Buggy python submission (verdict: Runtime Error):
# ABC138D - Ki
import sys
input = sys.stdin.readline

def dfs(v, p, tree, cnt):
    for u in tree[v]:
        if u != p:
            cnt[u] += cnt[v]
            dfs(u, v, tree, cnt)


def main():
    N, Q = tuple(map(int, input().split()))
    A = tuple(tuple(map(int, input().split())) for _ in range(N - 1))
    P = tuple(tuple(map(int, input().split())) for _ in range(Q))
    T = [[] for _ in range(N + 1)]  # T[i] := children of vertex i
    cnt = [0] * (N + 1)
    for a, b in A:  # set tree relations
        T[a] += [b]
        T[b] += [a]
    for p, x in P:  # increment on roots
        cnt[p] += x
    dfs(1, -1, T, cnt)
    print(*cnt[1:])


if __name__ == "__main__":
    main()

Fixed submission:
# ABC138D - Ki
import sys
input = sys.stdin.readline
sys.setrecursionlimit(10 ** 7)

def dfs(v, p, tree, cnt):
    for u in tree[v]:
        if u != p:
            cnt[u] += cnt[v]
            dfs(u, v, tree, cnt)


def main():
    N, Q = tuple(map(int, input().split()))
    A = tuple(tuple(map(int, input().split())) for _ in range(N - 1))
    P = tuple(tuple(map(int, input().split())) for _ in range(Q))
    T = [[] for _ in range(N + 1)]  # T[i] := children of vertex i
    cnt = [0] * (N + 1)
    for a, b in A:  # set tree relations
        T[a] += [b]
        T[b] += [a]
    for p, x in P:  # increment on roots
        cnt[p] += x
    dfs(1, -1, T, cnt)
    print(*cnt[1:])


if __name__ == "__main__":
    main()

Buggy python submission (verdict: Runtime Error):
# ABC138D - Ki
# https://atcoder.jp/contests/abc138/submissions/7012991
import sys
input = sys.stdin.readline

class Node:
    def __init__(self, parent=None):
        self.val = 0
        self.parent = parent


def main():
    N, Q = tuple(map(int, input().split()))
    A = tuple(tuple(map(int, input().split())) for _ in range(N - 1))
    P = tuple(tuple(map(int, input().split())) for _ in range(Q))
    T = [Node() for _ in range(N)]  # tree
    for a, b in A:  # set tree relationships
        T[b - 1].parent = a - 1
    for p, x in P:  # increment on roots
        T[p - 1].val += x
    for i in range(1, N):  # increment to children
        j = T[i].parent
        T[i].val += T[j].val
    print(*[node.val for node in T])


if __name__ == "__main__":
    main()

Fixed submission:
# ABC138D - Ki
import sys
input = sys.stdin.readline
sys.setrecursionlimit(10 ** 7)

def dfs(v, p, tree, cnt):
    for u in tree[v]:
        if u != p:
            cnt[u] += cnt[v]
            dfs(u, v, tree, cnt)


def main():
    N, Q = tuple(map(int, input().split()))
    A = tuple(tuple(map(int, input().split())) for _ in range(N - 1))
    P = tuple(tuple(map(int, input().split())) for _ in range(Q))
    T = [[] for _ in range(N + 1)]  # T[i] := children of vertex i
    cnt = [0] * (N + 1)
    for a, b in A:  # set tree relations
        T[a] += [b]
        T[b] += [a]
    for p, x in P:  # increment on roots
        cnt[p] += x
    dfs(1, -1, T, cnt)
    print(*cnt[1:])


if __name__ == "__main__":
    main()