1 files changed, 34 insertions, 0 deletions
diff --git a/13/main.cpp b/13/main.cpp
new file mode 100644
index 0000000..e306587
--- /dev/null
+++ b/13/main.cpp
@@ -0,0 +1,34 @@
+
+#include "header.hpp"
+#include <map>
+
+class Solution {
+public:
+  Solution() = default;
+  static int romanToInt(std::string s) {
+    std::map<unsigned char, int32_t> romanNumber = {
+        {'I', 1},   {'V', 5},   {'X', 10},  {'L', 50},
+        {'C', 100}, {'D', 500}, {'M', 1000}};
+    int result = 0;
+    int val = 0;
+    unsigned char prev;
+
+    for (int i = 0; i < s.length() - 1; ++i) {
+      val = romanNumber[s[i]];
+      if (romanNumber[s[i]] < romanNumber[s[i + 1]]) {
+        result = result - val;
+      } else {
+        result = result + val;
+      }
+    }
+
+    return result + romanNumber[s[s.length() - 1]];
+  }
+};
+
+int main(int argc, char **argv) {
+  std::string s;
+  std::cin >> s;
+  std::cout << Solution::romanToInt(s) << "\n";
+  return 0;
+}