Блок-схема для кода

from itertools import permutations
card = []
cards = set()
correct_card = False
with open("INPUT.txt", "r") as f:
    inp = f.readline()
inp_card = [int(i) for i in inp.split()]
for card in permutations(inp_card):
    cards.add(card)
for card in cards:
    result = int()
    for first_oper in '*', '+', '-':
        for second_oper in '*', '+', '-':
            for third_oper in '*', '+', '-':
                if first_oper == '*':
                    result = card[0] * card[1]
                elif first_oper == '+':
                    result = card[0] + card[1]
                else:
                    result = card[0] - card[1]
                if second_oper == '*':
                    result *= card[2]
                elif second_oper == '+':
                    result += card[2]
                else:
                    result -= card[2]
                if third_oper == '*':
                    result *= card[3]
                elif third_oper == '+':
                    result += card[3]
                else:
                    result -= card[3]
                if result == 24:
                    correct_card = True
                    break
            if correct_card:
                break
        if correct_card:
            break
    if correct_card:
        break
if correct_card:
    with open("OUTPUT.txt", "w") as x:
        x.write("YES")
else:
    with open("OUTPUT.txt", "w") as x:
        x.write("NO")