题解 | #完全数计算#

def checknature(x): #确认是否是完美数
    elem = []
    for i in range(1,x): #搜集因数
        if x%i == 0:
            elem.append(i)
    sum = 0
    for i in elem: #求和判断
        sum += i
    if x == sum:
        return True
    else:
        return False

while True:
    try:
        a = int(input())
    except:
        break
    else:
        count = 0
        for i in range(1,a+1):
            if checknature(i):
                count += 1
        print(count)