View Code 486. Predict the Winner https://leetcode.com/problems/predict-the-winner/description/ View Code 二维DP,一维亦可,二维DP易于理解。两个维度坐标含义相同,填表方式是沿对角线填表,这取决于子问题的结构。子问题结构比较容易看出来,对于dp[i][j],取头剩dp[i+1][j],取尾剩dp[i][j-1],但是...
Explanation: "a" does not match the entire string "aa". Example 2: Input: s = "aa" p = "*" Output: true Explanation: '*' matches any sequence. Example 3: Input: s = "cb" p = "?a" Output: false Explanation: '?' matches 'c', but the second letter is 'a', which does n...
Example 1:Input: n = 2 Output: 2 Explanation: There are two ways to climb to the top. 1....
那么当然会被先拿纸牌的人拿走, 所以返回 arr[i]。 (2)如果 i != j,那么当前拿纸牌的人有两个选择,要么拿走 arr[i], 要么拿走 arr[j]。如果拿走了 arr[i],那么排列剩下了 arr[i+1 ..j],对当前的玩家来说,面对 arr[i+1 .. j] 排列的纸牌,他成了后拿的人,所以他后续能获得的分数是 s(i+...