diff options
| author | crupest <crupest@outlook.com> | 2021-02-23 21:07:19 +0800 |
|---|---|---|
| committer | crupest <crupest@outlook.com> | 2021-02-23 21:07:19 +0800 |
| commit | d8f3b40085619cb680c8f227c65a1f5acc393223 (patch) | |
| tree | 6a38e3a6c79276fc396259ef962d17236dbed569 /leetcode/cpp/13.cpp | |
| parent | b0162802ad9723c678e495f29ca2f0fc0af2eff1 (diff) | |
| download | solutions-d8f3b40085619cb680c8f227c65a1f5acc393223.tar.gz solutions-d8f3b40085619cb680c8f227c65a1f5acc393223.tar.bz2 solutions-d8f3b40085619cb680c8f227c65a1f5acc393223.zip | |
Move leetcode solutions to subdir.
Diffstat (limited to 'leetcode/cpp/13.cpp')
| -rw-r--r-- | leetcode/cpp/13.cpp | 54 |
1 files changed, 54 insertions, 0 deletions
diff --git a/leetcode/cpp/13.cpp b/leetcode/cpp/13.cpp new file mode 100644 index 0000000..9b7c5df --- /dev/null +++ b/leetcode/cpp/13.cpp @@ -0,0 +1,54 @@ +#include <string>
+
+using std::string;
+
+int romanDigitNumber(char romanDigit)
+{
+ switch (romanDigit)
+ {
+ case 'I':
+ return 1;
+ case 'V':
+ return 5;
+ case 'X':
+ return 10;
+ case 'L':
+ return 50;
+ case 'C':
+ return 100;
+ case 'D':
+ return 500;
+ case 'M':
+ return 1000;
+ };
+ return 0;
+}
+
+class Solution
+{
+public:
+ int romanToInt(string s)
+ {
+ int result = 0;
+
+ int count = s.size();
+
+ for (int i = 0; i < count; i++)
+ {
+ const char c = s[i];
+ int num = romanDigitNumber(c);
+ if (i < count - 1)
+ {
+ const char next = s[i + 1];
+ if ((c == 'I' && (next == 'V' || next == 'X')) || (c == 'X' && (next == 'L' || next == 'C')) || (c == 'C') && (next == 'D' || next == 'M'))
+ {
+ num = -num;
+ }
+ }
+
+ result += num;
+ }
+
+ return result;
+ }
+};
|