difference between codes

[francheska]

What is the difference between these two codes?

while True:
    try:
        List1 = input()
        List2 = []
        correct = False
        P1 = 0
        P2 = 0
        for v in List1:
            if (v == '('):
                P1 += 1
                List2.append(v)
            if (v == ')'):
                P2 += 1
                List2.append(v)
        if(len(List2) % 2 != 0):
            correct = False
        else:
            if(List2[0] == ')'):
                correct = False
            else:
                if (List2[len(List2) - 1] == '('):
                    correct = False
                else:
                    if (P1 != P2):
                        correct = False
                    else:
                        correct = True
        if(correct):
            print("correct")
        else:
            print("incorrect")
    except (EOFError):
        break

while True:
    try:
        a = input()
        b = 0
        for i in range(len(a)):
            if(a[i] == '('):
                b += 1
            elif(a[i] == ')'):
                b -= 1
            if(b < 0):
                break
        if(b != 0):
            print('incorrect')
        else:
            print('correct')

    except EOFError:
        break

Yoriz write Nov-17-2021, 06:27 AM:
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[BashBedlam]

They appear to accomplish the same thing. So does this

while True:
	test = input()
	uneven = 0
	for character in test :
		if character == '(' :
			uneven += 1
		elif character == ')' :
			uneven -= 1
	print ('incorrect' if uneven else 'correct')