摘要：没想到哈希表insert插入是性能这么差，把哈希表该为数组后，运行时间减少了100msclass Solution {public: typedef pair Sdata; string intToRoman(int num) { Sdata pattern[] = { ... 阅读全文

摘要：class Solution {public: int romanToInt(string s) { int data[26] = {0}; data['I'-'A'] = 1; data['V'-'A'] = 5; data['X'-'A'] = 10; data['L'-'... 阅读全文

摘要：class Solution {public: enum { down = 0, up = 1, }; string convert(string s, int numRows) { string result; int index = 0; in... 阅读全文