04. Sum of Two Numbers

start = int(input())
end = int(input())
magic =int(input())
combinations = 0
is_magic = False

for i in range(start, end + 1):
    for j in range(start, end + 1):
        combinations += 1
        if i + j == magic:
            print(f"Combination N:{combinations} ({i} + {j} = {magic})")
            is_magic = True
            break
    if is_magic:
        break

if not is_magic:
    print(f"{combinations} combinations - neither equals {magic}")

Или:

start = int(input())
end = int(input())
magic = int(input())
combinations = 0

for i in range(start, end + 1):
    for j in range(start, end + 1):
        combinations += 1
        if i + j == magic:
            print(f"Combination N:{combinations} ({i} + {j} = {magic})")
            exit(0)

print(f"{combinations} combinations - neither equals {magic}")