Create guess-number-higher-or-lower-ii.cpp

C++/guess-number-higher-or-lower-ii.cpp

@@ -0,0 +1,18 @@
+// Time:  O(n^2)
+// Space: O(n^2)
+
+class Solution {
+public:
+    int getMoneyAmount(int n) {
+        vector<vector<int>> pay(n + 1, vector<int>(n));
+        for (int i = n - 1; i >= 0; --i) {
+            for (int j = i + 1; j < n; ++j) {
+                pay[i][j] = numeric_limits<int>::max();
+                for (int k = i; k <= j; ++k) {
+                    pay[i][j] = min(pay[i][j], k + 1 + max(pay[i][k - 1], pay[k + 1][j]));
+                }
+            }
+        }
+        return pay[0][n - 1];
+    }
+};