add: 220430-CN [cpp]

cpp/2204/220430-CN.cpp

@@ -0,0 +1,17 @@
+#include <vector>
+#include <algorithm>
+
+/**
+ * 908. Smallest Range I
+ * You are given an integer array nums and an integer k.
+ * In one operation, you can choose any index i where 0 <= i < nums.length and change nums[i] to nums[i] + x where x is an integer from the range [-k, k]. You can apply this operation at most once for each index i.
+ * The score of nums is the difference between the maximum and minimum elements in nums.
+ * Return the minimum score of nums after applying the mentioned operation at most once for each index in it.
+ */
+
+class Solution {
+public:
+	static int smallestRangeI(const std::vector<int>& nums, int k) {
+		return std::max(0, *std::max_element(nums.begin(), nums.end()) - *std::min_element(nums.begin(), nums.end()) - (k << 1));
+	}
+};