Palindromi

s = input()

l = len(s)

half, rem = divmod(len(s), 2)
left, right = s[:half], s[half + rem:]

#print(f"left = {left}")
#if rem != 0:
#    print(f"middle = {s[half]}")
#print(f"right = {right}")

muutokset = 0
for i in range(len(left)):
    #print(f"i = {i}")
    if not (left[i] == right[-(i+1)]):
        left = left[:i] + right[-(i+1)] + left[i + 1:]
        #print(left)
        #print(right)
        muutokset += 1
        #print(f"muutokset = {muutokset}")

print(muutokset)

#d  a   a  t
#0  1   0  1
#

Test 1 (public)

Verdict: ACCEPTED

Test 2 (public)

Verdict: ACCEPTED

Test 3 (public)

Verdict: ACCEPTED

Test 4 (public)

Verdict: ACCEPTED

Test 5 (public)

Verdict: ACCEPTED

Test 6 (public)

Verdict: ACCEPTED

Test 7 (public)

Verdict: ACCEPTED

Test 8 (public)

Verdict: ACCEPTED

Test 9 (public)

Verdict: ACCEPTED

Test 10 (public)

Verdict: ACCEPTED