hex = [0,1,2,3,4,5,6,7,8,9,"A","B","C","D","E","F"]
n = int(input("Digite um núemro inteiro: "))
r = []
while n > 0:
    r.append(hex[(n % 16)])
    n = n // 16
for i in range(len(r)-1,-1,-1):
    print(r[i],end="")