Leetcode 132 Solution

This article provides solution to leetcode question 132 (palindrome-partitioning-ii)
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https://leetcode.com/problems/palindrome-partitioning-ii

Solution

class Solution {
public:
    int minCut(string s) {
        if (s.size() == 0)
            return 0;

        vector<int> dp(s.size(), INT_MAX);
        bool ispar[s.size()][s.size()];

        memset((void*)ispar, 0, s.size() * s.size());

        for (int j = 0; j < s.size(); j++)
        {
            for (int i = 0; i <= j; i++)
            {
                if (s[i] == s[j])
                    ispar[i][j] = j - 1 <= i + 1 || ispar[i + 1][j - 1];
            }
        }

        for (int i = 0; i < s.size(); i++)
        {
            for (int j = 0; j <= i; j++)
            {
                if (ispar[j][i])
                    dp[i] = min(dp[i], (j > 0 ? dp[j - 1] + 1 : 1));
            }
        }

        return dp.back() - 1;
    }
};