Ответ:

Не понятно : |

h = int(input())

a = int(input())

b = int(input())

if a > 0:

   current_zero = h - a

else:

   current_zero = h + a

if current_zero < 1:

   current_zero = current_zero + 24

current_b = current_zero + b

if current_b < 1:

   current_b = current_b+24

print(current_b)