ФБТ БИ 2курс / global

s1 = input("First sequence: ")
s2 = input("Second sequence: ")

s1 = "_" + s1
s2 = "_" + s2


p = []
way = []
for i in s1:
    stolbik = []
    wayStolbik = []
    for j in s2:
        stolbik.append(0)
        wayStolbik.append("")
    p.append(stolbik)
    way.append(wayStolbik)

for i in range(len(s1)):
    p[i][0] = -2 * i

for j in range(len(s2)):
    p[0][j] = -2 * j

for x in range(1, len(s1)):
    for y in range(1, len(s2)):
        left = p[x-1][y] - 2
        up   = p[x][y-1] - 2

        if (s1[x] == s2[y]):
            slog =  1
        else:
            slog = -1

        diag = p[x-1][y-1] + slog

        p[x][y] = max(left, up, diag)

        if (p[x][y] == left):
            way[x][y] = "l"
        if (p[x][y] == up):
            way[x][y] = "u"
        if (p[x][y] == diag):
            way[x][y] = "d"
res1 = ""
res2 = ""

x = len(s1)-1
y = len(s2)-1

while (way[x][y] != ""):
    if (way[x][y] == "d"):
        res1 = s1[x] + res1
        res2 = s2[y] + res2
        x = x - 1
        y = y - 1

    if (way[x][y] == "u"):
        res1 = "_" + res1
        res2 = s2[y] + res2
        y = y - 1

    if (way[x][y] == "l"):
        res1 = s1[x] + res1
        res2 = "_" + res2
        x = x - 1


print("P matrix:")

for s in p:
    print(s)

print("Resulting sequence 1: " + res1)
print("Resulting sequence 2: " + res2)