1143.最长公共子序列

Posted 2021-11-12 HardyDragon_CC

1143.最长公共子序列

思路

• dp:长度为[0, i - 1]的字符串text1与长度为[0, j - 1]的字符串text2的最长公共子序列为dp[i][j]

class Solution {
    public int longestCommonSubsequence(String text1, String text2) {
        int size1 = text1.length();
        int size2 = text2.length();
        int[][] dp = new int[size1 + 1][size2 + 1];
        for(int i = 1;i <= size1;i++){
            for(int j = 1;j <= size2;j++){
                if(text1.charAt(i-1) == text2.charAt(j-1)){
                    dp[i][j] = dp[i-1][j-1] + 1;
                }else{
                    dp[i][j] = Math.max(dp[i][j-1],dp[i-1][j]);
                }
            }
        }
        return dp[size1][size2];
    }
}