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718.Maximum-Length-of-Repeated-Subarray

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718.Maximum-Length-of-Repeated-Subarray

本题的本质就是Longest Common Subarray,和Longest Common Subsequence属于同一类的题目,双序列DP是最常规的解法。本题的状态转移方程更直观。

根据双序列DP的套路,令dp[i][j]表示以i结尾的subarray和以j结尾的subarray相等的最大长度,则有:

dp[i][j] = dp[i-1][j-1]+1 if A[i]==B[j] else 0