add: 230227-CN

cpp/2302/230227-CN.cpp

@@ -0,0 +1,32 @@
+#include <vector>
+
+/**
+ * 1144. Decrease Elements To Make Array Zigzag
+ *
+ * Given an array nums of integers, a move consists of choosing any element and decreasing it by 1.
+ * An array A is a zigzag array if either:
+ * Every even-indexed element is greater than adjacent elements, ie. A[0] > A[1] < A[2] > A[3] < A[4] > ...
+ * OR, every odd-indexed element is greater than adjacent elements, ie. A[0] < A[1] > A[2] < A[3] > A[4] < ...
+ * Return the minimum number of moves to transform the given array nums into a zigzag array.
+ */
+
+class Solution {
+public:
+    static int movesToMakeZigzag(const std::vector<int>& nums) {
+        int tmp, c1 = 0, c2 = 0;
+        const int n = nums.size();
+        for (int i = 0; i < n; ++i) {
+            tmp = 0x7FFFFFFF;
+            if (i > 0)
+                tmp = std::min(tmp, nums[i - 1]);
+            if (i + 1 < n)
+                tmp = std::min(tmp, nums[i + 1]);
+            if (nums[i] >= tmp)
+                if (i & 1)
+                    c1 += nums[i] - (tmp - 1);
+                else
+                    c2 += nums[i] - (tmp - 1);
+        }
+        return std::min(c1, c2);
+    }
+};