题目

法1：DP

基础算法，必须掌握！！！

class Solution {public int longestCommonSubsequence(String text1, String text2) {int m = text1.length() + 1, n = text2.length() + 1;int[][] dp = new int[m][n];for (int i = 1; i < m; ++i) {for (int j = 1; j < n; ++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 - 1][j], dp[i][j - 1]);}}}return dp[m - 1][n - 1];}
}