#!/usr/bin/env python3
# from typing import *


import io
import sys

# _INPUT = """\
# 4 2 1
# 1 2
# 2 3
# 2 4
# """
# sys.stdin = io.StringIO(_INPUT)


def dfs_car(N, roads_car, pos, seen_car):
    seen_car[pos] = True
    for road in roads_car:
        if road[0] == pos and not seen_car[road[1]]:
            dfs_car(N, roads_car, road[1], seen_car)
        elif road[1] == pos and not seen_car[road[0]]:
            dfs_car(N, roads_car, road[0], seen_car)

def dfs_walk(N, roads_walk, pos, seen_walk, seen_car_walk):
    seen_walk[pos] = True
    seen_car_walk[pos] = True
    for road in roads_walk:
        if road[0] == pos and not seen_walk[road[1]]:
            dfs_walk(N, roads_walk, road[1], seen_walk, seen_car_walk)
        elif road[1] == pos and not seen_walk[road[0]]:
            dfs_walk(N, roads_walk, road[0], seen_walk, seen_car_walk)




# def solve(N: int, D: int, W: int, a: List[int], b: List[int], c: List[int], d: List[int]) -> int:
def solve(N, roads_car, roads_walk):

    count = 0
    seen_car_grand = [False] * N

    for pos in range(N):

        if seen_car_grand[pos]:
            continue

        seen_car = [False] * N
        dfs_car(N, roads_car, pos, seen_car)

        seen_car_walk = [seen for seen in seen_car]

        for pos1 in [i for i, x in enumerate(seen_car) if x]:
            seen_walk = [False] * N
            dfs_walk(N, roads_walk, pos1, seen_walk, seen_car_walk)

        n_car = len([1 for seen in seen_car if seen])
        n_car_walk = len([1 for seen in seen_car_walk if seen])
        count += n_car * (n_car_walk - 1)
        seen_car_grand = [seen_car_grand[i] or seen_car[i] for i in range(N)]

    return count


def main():
    N, D, W = map(int, input().split())
    roads_car = []
    roads_walk = []
    for i in range(D):
        a, b = map(int, input().split())
        roads_car.append((a - 1, b - 1))
    for i in range(W):
        c, d = map(int, input().split())
        roads_walk.append((c - 1, d - 1))
    a1 = solve(N, roads_car, roads_walk)
    print(a1)

if __name__ == '__main__':
    main()