solve 13

1 files changed, 33 insertions, 0 deletions

diff --git a/src/bin/p0013.rs b/src/bin/p0013.rs
new file mode 100644
index 0000000..b5f8a62
--- /dev/null
+++ b/src/bin/p0013.rs
@@ -0,0 +1,33 @@
+impl Solution {
+    fn char_to_int(c: char) -> i32 {
+        match c {
+            'I' => 1,
+            'V' => 5,
+            'X' => 10,
+            'L' => 50,
+            'C' => 100,
+            'D' => 500,
+            'M' => 1000,
+            _ => 0,
+        }
+    }
+    pub fn roman_to_int(s: String) -> i32 {
+        let mut sum = 0;
+        for i in 0..s.len() {
+            if i < s.len() - 1 {
+                if Self::char_to_int(s.as_bytes()[i as usize] as char)
+                        < Self::char_to_int(s.as_bytes()[i+1 as usize] as char) {
+                    sum = sum - Self::char_to_int(s.as_bytes()[i as usize] as char);
+                    continue;
+                }
+            }
+            sum = sum + Self::char_to_int(s.as_bytes()[i as usize] as char);
+        }
+        sum
+    }
+}
+
+struct Solution {}
+fn main() {
+    println!("{}", Solution::roman_to_int("MCMXCIV".to_string()));
+}
\ No newline at end of file