linesFormatted = []
with open("9 - input", 'r') as file:
    lines = file.readlines()
    for line in lines:
        linesFormatted.append(int(line.strip("\n")))

start = 0
while start+24 <= len(linesFormatted):
    stop = start + 25
    target = linesFormatted[stop]

    valid = False
    for num1 in linesFormatted[start:stop]:
        for num2 in linesFormatted[start:stop]:
            if num1+num2 == target and num1 != num2:
                print(f"Sum exists for {target}")
                valid = True
                break
        if valid:
            break
    if not valid:
        print(f"Sum does not exist for {target}!")
        break
    start += 1