Count palindromes by expanding around all centers.
For each i, expand odd (i,i) and even (i,i+1) centers, adding 1 for each successful expansion.
Every palindromic substring has a unique center.
Count palindromes by expanding around all centers.
For each i, expand odd (i,i) and even (i,i+1) centers, adding 1 for each successful expansion.
Every palindromic substring has a unique center.