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-rw-r--r--other/max_ice_cream_bars.cpp39
1 files changed, 39 insertions, 0 deletions
diff --git a/other/max_ice_cream_bars.cpp b/other/max_ice_cream_bars.cpp
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+++ b/other/max_ice_cream_bars.cpp
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+#include "leetcode.h"
+
+class Solution {
+public:
+ int maxIceCream(vector<int> &costs, int coins) {
+ int k = costs.size();
+ vector<int> dp(k + 1, -1);
+ sort(costs.begin(), costs.end());
+ return dfs(dp, costs, coins, 0, k);
+ }
+
+private:
+ int dfs(vector<int> &dp, vector<int> &nums, int coins, int i, int k) {
+ if (coins <= 0)
+ return 0;
+ if (i == k - 1) {
+ if (nums[i] <= coins)
+ return 1;
+ else
+ return 0;
+ }
+ if (dp[i] != -1)
+ return dp[i];
+ int y = 0, n = 0;
+ if (nums[i] <= coins)
+ y = 1 + dfs(dp, nums, coins - nums[i], i + 1, k);
+ n = dfs(dp, nums, coins, i + 1, k);
+ return dp[i] = max(y, n);
+ }
+};
+
+int main() {
+ Solution obj;
+ vector<int> costs1 = {1, 3, 2, 4, 1}, costs2 = {10, 6, 8, 7, 7, 8},
+ costs3 = {1, 6, 3, 1, 2, 5};
+ cout << obj.maxIceCream(costs1, 7) << endl; // expect: 4
+ cout << obj.maxIceCream(costs2, 5) << endl; // expect: 0
+ cout << obj.maxIceCream(costs3, 20) << endl; // expect: 6
+}