a=int(input())
time=[10,0]
time[1]=a/(100/60)
while time[1]>=60:
    time[1]=time[1]-60
    time[0]=time[0]+1
    if time[0]>=24:
        time[0]=time[0]-24
if time[1]<10:
    answer=str(time[0])+":0"+str(int(time[1]))
else:
    answer=str(time[0])+":"+str(int(time[1]))
print(answer)