import sys
from collections import deque

def main():
    input = sys.stdin.read().split()
    ptr = 0
    N, Q = int(input[ptr]), int(input[ptr+1])
    ptr += 2
    adj = [[] for _ in range(N+1)]
    for _ in range(N-1):
        a = int(input[ptr])
        b = int(input[ptr+1])
        adj[a].append(b)
        adj[b].append(a)
        ptr += 2
    
    ans = [0] * (N + 1)
    
    for _ in range(Q):
        X = int(input[ptr])
        Y = int(input[ptr+1])
        Z = int(input[ptr+2])
        ptr += 3
        
        print(ans[X])
        
        visited = [False] * (N + 1)
        q = deque()
        q.append((X, 0))
        visited[X] = True
        while q:
            u, d = q.popleft()
            if d > Y:
                break
            ans[u] += Z
            for v in adj[u]:
                if not visited[v]:
                    visited[v] = True
                    q.append((v, d + 1))
    
if __name__ == "__main__":
    main()