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题目：

题解：

class Solution {
public:bool PredictTheWinner(vector<int>& nums) {int length = nums.size();auto dp = vector<int>(length);for (int i = 0; i < length; i++) {dp[i] = nums[i];}for (int i = length - 2; i >= 0; i--) {for (int j = i + 1; j < length; j++) {dp[j] = max(nums[i] - dp[j], nums[j] - dp[j - 1]);}}return dp[length - 1] >= 0;}
};