s0012

src/s0012_integer_to_roman.cpp

@@ -0,0 +1,19 @@
+#include "s0012_integer_to_roman.hpp"
+
+// 贪心哈希表
+// 先硬编码一个哈希表
+// 然后当数值大于一个值的时候，就直接把对应的字符串加上去
+
+string Solution::intToRoman(int num) {
+  int values[] = {1000, 900, 500, 400, 100, 90, 50, 40, 10, 9, 5, 4, 1};
+  string reps[] = {"M",  "CM", "D",  "CD", "C",  "XC", "L",
+                   "XL", "X",  "IX", "V",  "IV", "I"};
+  string res;
+  for (int i = 0; i < 13; i++) {
+    while (num >= values[i]) {
+      num -= values[i];
+      res += reps[i];
+    }
+  }
+  return res;
+}