LeetCode-13ロマ数字変換整数
4006 ワード
"""
7 , :
ROMAN = {'M':1000,'D':500,'C':100,'L':50,'X':10,'V':5,'I':1}
hint1 ,
, :
四つのルール(http://blog.csdn.net/net_wolf_007/article/details/51770112)"""
class Solution: def romanToInt(self, s): """ :type s: str :rtype: int """ sum = 0 ROMAN = {'M':1000,'D':500,'C':100,'L':50,'X':10,'V':5,'I':1} for i in range(len(s)-1): if (ROMAN[s[i]] < ROMAN[s[i+1]]): sum = sum - ROMAN[s[i]] else: sum = sum + ROMAN[s[i]] return sum + ROMAN[s[-1]]
class Solution(object): def romanToInt(self, s): """ :type s: str :rtype: int I(1),V(5),X(10),L(50),C(100),D(500),M(1000) """ sum = 0 temp = 0 ROMAN = {'I':1,'V':5,'X':10,'L':50,'C':100,'D':500,'M':1000} for ch in s: ch_val = int(ROMAN[ch]) sum = sum + ch_val if temp < ch_val: sum -= temp*2 temp = ch_val return sum