Buggy python submission (verdict: Runtime Error):
import sys

class UnionFind():
    def __init__(self, N):
        self.N = N
        self.par = [n for n in range(N)]
        self.rank = [0 for _ in range(N)]

    def find(self, x):
        if self.par[x] == x:
            return x
        self.par[x] = self.find(self.par[x])
        return self.par[x]

    def union(self, x, y):
        x = self.par[x]
        y = self.par[y]
        if self.rank[x] < self.rank[y]:
            self.par[x] = y
        else:
            self.par[y] = x
            if self.rank[x] == self.rank[y]:
                self.rank[x] += 1

    def isSame(self, x, y):
        return self.par[x] == self.par[y]

    def refresh(self):
        for p in range(N):
            self.find(p)

N, K, L = [int(x) for x in input().strip().split()]
road = UnionFind(N)
train = UnionFind(N)

for ｋ in range(K):
    p, q = [int(x) - 1 for x in input().strip().split()]
    road.union(p, q)
for l in range(L):
    r, s = [int(x) - 1 for x in input().strip().split()]
    train.union(r, s)

road.refresh()
train.refresh()

ans = [1] * N
for i in range(N - 1):
    for j in range(i + 1, N):
        if i == j:
            continue
        if road.par[i] == road.par[j] and train.par[i] == train.par[j]:
            ans[i] += 1
            ans[j] += 1

print(*ans)

Fixed submission:
import sys
from collections import defaultdict
sys.setrecursionlimit(10**7)

N, K, L = [int(x) for x in input().strip().split()]
road_par = [n for n in range(N)]
road_rank = [0 for _ in range(N)]
train_par = [n for n in range(N)]
train_rank = [0 for _ in range(N)]

def find(par, x):
    if par[x] == x:
        return x
    par[x] = find(par, par[x])
    return par[x]

def union(par, rank, x, y):
    x = find(par, par[x])
    y = find(par, par[y])
    if x == y:
        return
    if rank[x] < rank[y]:
        par[x] = y
    else:
        par[y] = x
        if rank[x] == rank[y]:
            rank[x] += 1

for ｋ in range(K):
    p, q = [int(x) - 1 for x in input().strip().split()]
    union(road_par, road_rank, p, q)
for l in range(L):
    r, s = [int(x) - 1 for x in input().strip().split()]
    union(train_par, train_rank, r, s)

d = defaultdict(int)
for n in range(N):
    r = find(road_par, n)
    t = find(train_par, n)
    d[(r, t)] += 1

for n in range(N):
    print(d[(road_par[n], train_par[n])], end=' ')

Buggy python submission (verdict: Runtime Error):
import sys

class UnionFind():
    def __init__(self, N):
        self.N = N
        self.par = [n for n in range(N)]
        self.rank = [0 for _ in range(N)]

    def find(self, x):
        if self.par[x] == x:
            return x
        self.par[x] = self.find(self.par[x])
        return self.par[x]

    def union(self, x, y):
        x = self.par[x]
        y = self.par[y]
        if self.rank[x] < self.rank[y]:
            self.par[x] = y
        else:
            self.par[y] = x
            if self.rank[x] == self.rank[y]:
                self.rank[x] += 1

    def isSame(self, x, y):
        return self.par[x] == self.par[y]

    def refresh(self):
        for p in range(N):
            self.find(p)

N, K, L = [int(x) for x in input().strip().split()]
road = UnionFind(N)
train = UnionFind(N)

for ｋ in range(K):
    p, q = [int(x) - 1 for x in input().strip().split()]
    road.union(p, q)
for l in range(L):
    r, s = [int(x) - 1 for x in input().strip().split()]
    train.union(r, s)

road.refresh()
train.refresh()

ans = [0] * N
for i in range(N):
    c = 1
    for j in range(N):
        if i == j:
            continue
        if road.par[i] == road.par[j] and train.par[i] == train.par[j]:
            c += 1
    ans[i] = c
print(*ans)

Fixed submission:
import sys
from collections import defaultdict
sys.setrecursionlimit(10**7)

N, K, L = [int(x) for x in input().strip().split()]
road_par = [n for n in range(N)]
road_rank = [0 for _ in range(N)]
train_par = [n for n in range(N)]
train_rank = [0 for _ in range(N)]

def find(par, x):
    if par[x] == x:
        return x
    par[x] = find(par, par[x])
    return par[x]

def union(par, rank, x, y):
    x = find(par, par[x])
    y = find(par, par[y])
    if x == y:
        return
    if rank[x] < rank[y]:
        par[x] = y
    else:
        par[y] = x
        if rank[x] == rank[y]:
            rank[x] += 1

for ｋ in range(K):
    p, q = [int(x) - 1 for x in input().strip().split()]
    union(road_par, road_rank, p, q)
for l in range(L):
    r, s = [int(x) - 1 for x in input().strip().split()]
    union(train_par, train_rank, r, s)

d = defaultdict(int)
for n in range(N):
    r = find(road_par, n)
    t = find(train_par, n)
    d[(r, t)] += 1

for n in range(N):
    print(d[(road_par[n], train_par[n])], end=' ')

Buggy python submission (verdict: Runtime Error):
import sys

class UnionFind():
    def __init__(self, N):
        self.N = N
        self.par = [n for n in range(N)]
        self.rank = [0 for _ in range(N)]

    def find(self, x):
        if self.par[x] == x:
            return x
        self.par[x] = self.find(self.par[x])
        return self.par[x]

    def union(self, x, y):
        x = self.par[x]
        y = self.par[y]
        if self.rank[x] < self.rank[y]:
            self.par[x] = y
        else:
            self.par[y] = x
            if self.rank[x] == self.rank[y]:
                self.rank[x] += 1

    def isSame(self, x, y):
        return self.par[x] == self.par[y]

    def refresh(self):
        for p in range(N):
            self.find(p)

N, K, L = [int(x) for x in input().strip().split()]
road = UnionFind(N)
train = UnionFind(N)

for ｋ in range(K):
    p, q = [int(x) - 1 for x in input().strip().split()]
    road.union(p, q)
for l in range(L):
    r, s = [int(x) - 1 for x in input().strip().split()]
    train.union(r, s)

road.refresh()
train.refresh()

ans = [0] * N
for i in range(N):
    c = 1
    for j in range(N):
        if i == j:
            continue
        if road.par[i] == road.par[j] and train.par[i] == train.par[j]:
            c += 1
    ans[i] = c
print(*ans)

Fixed submission:
import sys
from collections import defaultdict
sys.setrecursionlimit(10**7)

N, K, L = [int(x) for x in input().strip().split()]
road_par = [n for n in range(N)]
road_rank = [0 for _ in range(N)]
train_par = [n for n in range(N)]
train_rank = [0 for _ in range(N)]

def find(par, x):
    if par[x] == x:
        return x
    par[x] = find(par, par[x])
    return par[x]

def union(par, rank, x, y):
    x = find(par, par[x])
    y = find(par, par[y])
    if x == y:
        return
    if rank[x] < rank[y]:
        par[x] = y
    else:
        par[y] = x
        if rank[x] == rank[y]:
            rank[x] += 1

for ｋ in range(K):
    p, q = [int(x) - 1 for x in input().strip().split()]
    union(road_par, road_rank, p, q)
for l in range(L):
    r, s = [int(x) - 1 for x in input().strip().split()]
    union(train_par, train_rank, r, s)

d = defaultdict(int)
for n in range(N):
    r = find(road_par, n)
    t = find(train_par, n)
    d[(r, t)] += 1

for n in range(N):
    print(d[(road_par[n], train_par[n])], end=' ')