import sys
readline = sys.stdin.readline

MOD = 10**9+7

N, M = map(int, readline().split())

cEdge = []
Edge = [[] for _ in range(N)]
for _ in range(M):
    u, v, w = map(int, readline().split())
    u -= 1
    v -= 1
    cEdge.append((w, u, v))
    Edge[u].append((w, v))
cEdge.sort()
used = set()
ans = [-1]*N

block = 2*N + 10
geta = N + 3
used.add(geta)
for w, u, v in cEdge:
    stack = [geta]
    for c in range(block-1):
        unode = u*block + c
        vnode = v*block + c + 1
        if unode in used and vnode not in used:
            used.add(vnode)
            stack.append(vnode)
            if c + 1 >= geta and ans[v] == -1:
                ans[v] = w
    
    while stack:
        node = stack.pop()
        vn, c = divmod(node, block)
        for wi, vf in Edge[vn]:
            if wi <= w:
                if c + 1 < block:
                    vfnode = vf*block + c + 1
                    if vfnode not in used:
                        used.add(vfnode)
                        stack.append(vfnode)
                        if ans[vf] == -1 and c+1 >= geta:
                            ans[vf] = w
            else:
                if c - 1 >= 0:
                    vfnode = vf*block + c - 1
                    if vfnode not in used:
                        used.add(vfnode)
                        stack.append(vfnode)
                        if ans[vf] == -1 and c-1 >= geta:
                            ans[vf] = w
        
print('\n'.join(map(str, ans[1:])))