Problem p03017 (python)

Fixed submission:
n,a,b,c,d = [int(i) for i in input().split()]
s = input()


flag1 = False
block = 0
for i in range(b, len(s)):
    if block == 2:
        flag1 = False
        break
    elif i == d-1:
        flag1 = True
        break
    elif s[i] == ".":
        block = 0
    elif s[i] == "#":
        block += 1

if flag1 == True:
    s2 = s[:d-1]+'#'+s[d:]
    flag1 = False
    block = 0
    for i in range(a, len(s)):
        if block == 2:
            flag1 = False
            break
        elif i == c-1:
            flag1 = True
            break
        elif s2[i] == ".":
            block = 0
        elif s2[i] == "#":
            block += 1


flag2 = False
flag3 = False
temp = 0
block = 0
for i in range(b-2,c-2):
    if temp == 3:
        flag2 = True
        temp = i-1
        break
    elif s[i] == "#":
        temp = 0
    elif s[i] == ".":
        temp += 1

if flag2 == True:
    flag3 = False
    block = 0
    s1 = s[:temp-1]+'#'+s[temp:]
    for i in range(a, len(s)):
        if block == 2:
            flag3 = False
            break
        elif i == c-1:
            flag3 = True
            break
        elif s1[i] == ".":
            block = 0
        elif s1[i] == "#":
            block += 1

    if flag3 == True:
        s3 = s1[:c - 1] + '#' + s1[c:]
        flag3 = False
        block = 0
        for i in range(temp, len(s)):
            if block == 2:
                flag3 = False
                break
            elif i == d-1:
                flag3 = True
                break
            elif s3[i] == ".":
                block = 0
            elif s3[i] == "#":
                block += 1

if flag1 or flag3:
    print("Yes")
else:
    print("No")

Buggy submission (verdict: Runtime Error):
print("Yes")n,a,b,c,d = [int(i) for i in input().split()]
s = input()


flag1 = False
block = 0
for i in range(b, len(s)):
    if block == 2:
        flag1 = False
        break
    elif i == d-1:
        flag1 = True
        break
    elif s[i] == ".":
        block = 0
    elif s[i] == "#":
        block += 1

if flag1 == True:
    s2 = s[:d-1]+'#'+s[d:]
    flag1 = False
    block = 0
    for i in range(a, len(s)):
        if block == 2:
            flag1 = False
            break
        elif i == c-1:
            flag1 = True
            break
        elif s2[i] == ".":
            block = 0
        elif s2[i] == "#":
            block += 1


flag2 = False
flag3 = False
temp = 0
block = 0
for i in range(b-2,c-1):
    if temp == 3:
        flag2 = True
        temp = i-1
        break
    elif s[i] == "#":
        temp = 0
    elif s[i] == ".":
        temp += 1

if flag2 == True:
    flag3 = False
    block = 0
    s1 = s[:temp-1]+'#'+s[temp:]
    for i in range(a, len(s)):
        if block == 2:
            flag3 = False
            break
        elif i == c-1:
            flag3 = True
            break
        elif s1[i] == ".":
            block = 0
        elif s1[i] == "#":
            block += 1

    if flag3 == True:
        s3 = s1[:c - 1] + '#' + s1[c:]
        flag3 = False
        block = 0
        for i in range(temp + 1, len(s)):
            if block == 2:
                flag3 = False
                break
            elif i == c-1:
                flag3 = True
                break
            elif s3[i] == ".":
                block = 0
            elif s3[i] == "#":
                block += 1

if flag1 or flag3:
    print("Yes")
else:
    print("No")

Buggy submission (verdict: Runtime Error):
print(Yes)