Buggy python submission (verdict: Time Limit Exceeded):
import sys
input = sys.stdin.readline

n, m = map(int,input().split())
nei =[[i] for i in range(n)]

for i in range(m):
    a, b = map(int,input().split())
    a -= 1
    b -= 1
    nei[a].append(b)
    nei[b].append(a)

color = [0 for i in range(n)]
#print(nei)
def paint(v,d,c):
    if color[v] == 0:
        color[v] = c
    if d == 0:
        return
    for i in nei[v]:
        paint(i,d-1,c)

q = int(input())
vbc = [list(map(int,input().split())) for i in range(q)][::-1]

for i in range(q):
    paint(vbc[i][0]-1,vbc[i][1],vbc[i][2])
    #print(color)

for i in range(n):
    print(color[i])

Fixed submission:
import sys
input = sys.stdin.readline

n, m = map(int,input().split())
nei =[[i] for i in range(n)]

for i in range(m):
    a, b = map(int,input().split())
    a -= 1
    b -= 1
    nei[a].append(b)
    nei[b].append(a)

color = [0 for i in range(n)]
depth = [-1 for i in range(n)]

def paint(v,d,c,pre):
    if d <= depth[v]:
        return
    depth[v] = d
    if color[v] == 0:
        color[v] = c
    if d == 0:
        return
    for next in nei[v]:
        if next == pre:
            continue
        paint(next,d-1,c,v)

q = int(input())
vbc = [list(map(int,input().split())) for i in range(q)][::-1]

for i in range(q):
    paint(vbc[i][0]-1,vbc[i][1],vbc[i][2],-1)
    #print(color)


for co in color:
    print(co)

Buggy python submission (verdict: Time Limit Exceeded):
n, m = map(int,input().split())
nei =[[i] for i in range(n)]

for i in range(m):
    a, b = map(int,input().split())
    a -= 1
    b -= 1
    nei[a].append(b)
    nei[b].append(a)

color = [0 for i in range(n)]
#print(nei)
def paint(v,d,c):
    if color[v] == 0:
        color[v] = c
    if d == 0:
        return
    for i in nei[v]:
        paint(i,d-1,c)

q = int(input())
vbc = [list(map(int,input().split())) for i in range(q)][::-1]

for i in range(q):
    paint(vbc[i][0]-1,vbc[i][1],vbc[i][2])
    #print(color)

for i in range(n):
    print(color[i])

Fixed submission:
import sys
input = sys.stdin.readline

n, m = map(int,input().split())
nei =[[i] for i in range(n)]

for i in range(m):
    a, b = map(int,input().split())
    a -= 1
    b -= 1
    nei[a].append(b)
    nei[b].append(a)

color = [0 for i in range(n)]
depth = [-1 for i in range(n)]

def paint(v,d,c,pre):
    if d <= depth[v]:
        return
    depth[v] = d
    if color[v] == 0:
        color[v] = c
    if d == 0:
        return
    for next in nei[v]:
        if next == pre:
            continue
        paint(next,d-1,c,v)

q = int(input())
vbc = [list(map(int,input().split())) for i in range(q)][::-1]

for i in range(q):
    paint(vbc[i][0]-1,vbc[i][1],vbc[i][2],-1)
    #print(color)


for co in color:
    print(co)

Buggy python submission (verdict: Time Limit Exceeded):
def makelist2(n,m):
    return[[float("inf") for k in range(m)]for i in range(n)]

n, m = map(int,input().split())
dist = makelist2(n,n)
for i in range(m):
    a,b = map(int,input().split())
    a -= 1
    b -= 1
    dist[a][b] = 1
    dist[b][a] = 1
for i in range(n):
    dist[i][i] = 0

for i in range(n):
    for j in range(n):
        for k in range(n):
            dist[j][k] = min(dist[j][k], dist[j][i] + dist[i][k])

Q = int(input())
vbc = [list(map(int,input().split())) for i in range(Q)][::-1]
ans = [0 for i in range(n)]


for q in range(Q):
    for i in range(n):
        if dist[vbc[q][0]-1][i] <= vbc[q][1] and ans[i] == 0:
            ans[i] = vbc[q][2]

for p in ans:
    print(p)

Fixed submission:
import sys
input = sys.stdin.readline

n, m = map(int,input().split())
nei =[[i] for i in range(n)]

for i in range(m):
    a, b = map(int,input().split())
    a -= 1
    b -= 1
    nei[a].append(b)
    nei[b].append(a)

color = [0 for i in range(n)]
depth = [-1 for i in range(n)]

def paint(v,d,c,pre):
    if d <= depth[v]:
        return
    depth[v] = d
    if color[v] == 0:
        color[v] = c
    if d == 0:
        return
    for next in nei[v]:
        if next == pre:
            continue
        paint(next,d-1,c,v)

q = int(input())
vbc = [list(map(int,input().split())) for i in range(q)][::-1]

for i in range(q):
    paint(vbc[i][0]-1,vbc[i][1],vbc[i][2],-1)
    #print(color)


for co in color:
    print(co)