-
Notifications
You must be signed in to change notification settings - Fork 0
Expand file tree
/
Copy pathLeetcode13.cpp
More file actions
45 lines (37 loc) · 1.37 KB
/
Leetcode13.cpp
File metadata and controls
45 lines (37 loc) · 1.37 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
// Leetcode13.cpp : This file contains the 'main' function. Program execution begins and ends there.
//
#include <iostream>
#include <string>
#include <unordered_map>
using namespace::std;
int romanToInt(string s)
{
int sum = 0;
unordered_map<char, pair<int, int>> ch = { {'I',{1,1}},{'V',{2,5}},{'X',{3,10}},{'L',{4,50}},{'C',{5,100}},{'D',{6,500}},{'M',{7,1000}} };
auto last = *s.rbegin();
for (auto it = s.rbegin(); it != s.rend(); ++it)
{
auto cur = *it;
if (ch[cur].first < ch[last].first)
sum -= ch[cur].second;
else
sum += ch[cur].second;
last = cur;
}
return sum;
}
int main()
{
string s = "MCMXCIV";
int res = romanToInt(s);
std::cout << "Hello World!\n";
}
// Run program: Ctrl + F5 or Debug > Start Without Debugging menu
// Debug program: F5 or Debug > Start Debugging menu
// Tips for Getting Started:
// 1. Use the Solution Explorer window to add/manage files
// 2. Use the Team Explorer window to connect to source control
// 3. Use the Output window to see build output and other messages
// 4. Use the Error List window to view errors
// 5. Go to Project > Add New Item to create new code files, or Project > Add Existing Item to add existing code files to the project
// 6. In the future, to open this project again, go to File > Open > Project and select the .sln file