a = int(input())

K = (a // 100) * 60 + (a % 100)/100 * 60

A = 10 + int(K) // 60

if int(K) % 60  < 10:
    H = '0' + str(int(K) % 60)
else:
    H = int(K) % 60

Y = str(A) + ':' + str(H)

print(Y)