a = int(input())
Time_h = 10
Time_m = 0

dt_h = a//100
dt_m = (a%100)*60/100

Time_h = int(Time_h + dt_h)
Time_m = int(Time_m + dt_m)

if len(str(Time_m)) == 1:
    print("".join([str(Time_h), ":", "0", str(Time_m)]))
else:
    print("".join([str(Time_h), ":", str(Time_m)]))