Integer to Roman
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定义罗马数字中的各个基本数字，然后从最高radix到最低radix，仿照进制转换的方法进行。
class Solution {public: string intToRoman(int num) { const int radix[] = {1000, 900, 500, 400, 100, 90, 50, 40, 10, 9, 5, 4, 1}; const string symbol[] = {"M", "CM", "D", "CD", "C", "XC", "L", "XL", "X", "IX", "V", "IV", "I"}; string roman; for (size_t i = 0; num > 0; ++i) { int count = num / radix[i]; num %= radix[i]; for (; count > 0; --count) roman += symbol[i]; } return roman; }}; 0 0
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