「自作Python100本ノック」14日目（91本〜95本目） ref: https://qiita.com/ahpjop/items/dc68cc02bc2b2ac30669

q91.py

def count_one(n):
    counts = 0
    for i in range(1,n+1):
        str_i = str(i)
        count = str_i.count("1")
        counts += count
    return counts



count_one(100)

q92.py

def remocon(a,b):
    target = b - a
    min_count = 100
    for o in range(100):
        for f in range(100):
            for t in range(100):
                if o + 5 * f + 10 * t == target or  -1 * o + -5 * f + -10 * t == target:
                    count = o + f + t
                    if min_count > count:
                        min_count = count
                        a_o = o
                        a_f = f
                        a_t = t

    print(a_o, a_f, a_t)

remocon(10,5)

q93.py

ans = set([])
for i in l:
    while i % 2 == 0:
        i = i // 2

  　 ans.add(i)

print(len(ans))

q94.py

def substract_game(n, ng_words):
    count = 0
    flag = 0
    a = ng_words[0]
    b = ng_words[1]
    c = ng_words[2]
    while count < 100 and n != (a or b or c) and n >=4:
        if not (n-3 in ng_words):
            count += 1
            n = n-3
        elif not (n-2 in ng_words):
            count += 1
            n = n-2
        elif not (n-1 in ng_words):
            count += 1
            n = n-1
        else:
            flag = 0
            break

    if (n == 1 or n == 2 or n ==3) and count<=99:
        n = 0
        flag = 1

    if n > 0:
        flag = 0

    if flag == 1:
        print('YES')
    else:
        print('NO')

substract_game(100, [29,54,43])

q95.py

from datetime import date, timedelta

def check_date(today):
    Y, M, D = [int(n) for n in today.split('/')]
    dt = date(Y, M, D)
    while True:
        if Y % M == 0 and (Y / M) % D == 0:
            break
        dt += timedelta(days=1)
        Y = dt.year
        M = dt.month
        D = dt.day

    print(dt.strftime('%Y/%m/%d'))


check_date("2017/05/11")