题解 | #取近似值#

n = input()
# n = '13.4999'
if len(n) > 1:
    n_1 = n.split('.')
    # print(n_1)
    # if int(n_1[1]) - 5>= 0:
    #     res = int(n[0]) + 1
    #     print(res)

    for i in n_1[1]:
        if int(i) < 5:
            print(n_1[0])
            break
        else:
            print(int(n_1[0])+1)
            break

else:
    print(n)