题目:
题解:
- class Solution {
- public:
- int maxCoins(vector<int>& nums) {
- int n = nums.size();
- vector<vector<int>> rec(n + 2, vector<int>(n + 2));
- vector<int> val(n + 2);
- val[0] = val[n + 1] = 1;
- for (int i = 1; i <= n; i++) {
- val[i] = nums[i - 1];
- }
- for (int i = n - 1; i >= 0; i--) {
- for (int j = i + 2; j <= n + 1; j++) {
- for (int k = i + 1; k < j; k++) {
- int sum = val[i] * val[k] * val[j];
- sum += rec[i][k] + rec[k][j];
- rec[i][j] = max(rec[i][j], sum);
- }
- }
- }
- return rec[0][n + 1];
- }
- };
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