Sum of two num 5/11

start_int = int(input())
end_int = int(input())
magic_num = int(input())

combination_cnt = 0

is_combination_found = False
for n_1 in range (start_int, end_int +1):
    for n_2 in range (start_int, end_int +1):
        num_sum = n_1 +n_2
        combination_cnt += 1

        if num_sum == magic_num:
            is_combination_found = True
            break

    if is_combination_found:
        break

if is_combination_found:
    print(f'Combination N:{combination_cnt} ({n_1} + {n_2} = {magic_num})')
else:
    print(f'{combination_cnt} combinations - neither equals {magic_num}')