Исполнитель Редактор

for _2 in range(1, 20):
    st = ('1' * 10) + ('2' * _2)
    # st = ('2' * _2) + ('1' * 10)
    # print(st)
    kol_st_2 = st.count('2')
    while '12' in st:
        st = st.replace('12', '4', 1)
    kol_1 = st.count('1')
    kol_2 = (st.count('2') * 2)
    kol_4 = (st.count('4') * 4)
    if kol_1 + kol_2 + kol_4 == 25:
        print(kol_st_2)

k = _2 = 1
res = (25 - 10 + 1) // 2
while True:
    st = ('4' * _2) + ('1' * (10 - _2))
    sum_st = sum(map(int, list(st)))
    k = (25 - sum_st) // 2
    cnt2 = _2 + k 
    
    if cnt2 < res:
        res = cnt2
    
    ##########
    print(st)
    print(sum_st)
    print(cnt2) 
    print()
    ##########
    
    if sum_st == 25 or _2 > 12:
        print(res)
        break
    _2 += 2

for x in range(50):
     s = ('1' * 10) + (x * '2')
     while '12' in s:
         s = s.replace('12', '4', 1)
     if sum(list(map(int, s))) == 25:
         print(x)

from math import inf
# a1 = b1 + b4 == 10
# a2 = b2 + b4 -> min
min_res = inf
for b1 in range(10+1):
    b4 = 10 - b1
    b2 = (25 - b1 - 4*b4)/2
    if b2.is_integer() and b2 >= 0:
        min_res = min(min_res, b2+b4)
print(min_res)