Create 383. Ransom Note.md

383. Ransom Note.md

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+# [383. Ransom Note](https://leetcode.com/problems/ransom-note/description/)
+# 思路
+用一个大小为26的数组count记录magazine中26个字母的出现次数，只要每个字母出现次数不小于ransomNote对应字母次数就行了。
+# C++
+```
+class Solution {
+public:
+    bool canConstruct(string ransomNote, string magazine) {
+        vector<int>count(26);
+        for(char c: magazine) count[c - 'a']++;
+        for(char c: ransomNote)
+            if(0 > --count[c - 'a']) return false;
+        return true;
+    }
+};
+```