r=int(input())
mr=r*1000
mv=100/60*1000
mt=(mr/mv)
if mt>=60:
    h=int(mt//60)
    m=int(mt-h*60)
else:
    h=""
    m=int(mt)
if m<10:
    c="0"
else:
    c=""
print(str(h+10)+":"+c+str(m))