code golf

input.txt

@@ -1,5 +1,15 @@
+1
+4
+5
+9
 43
+50
+51
 104
 243
 401
+510
+999
+1999
 3277
+3999

main.py

@@ -0,0 +1,18 @@
+import sys
+
+v = [[1], [9, 5, 4, 1], [9, 5, 4, 1], [9, 5, 4, 1]]
+s = [['M'], ['CM', 'D', 'CD', 'C'], ['XC', 'L', 'XL', 'X'], ['IX', 'V', 'IV', 'I']]
+with open(sys.argv[1], 'r') as f:
+    l = f.readline().strip()
+    while l != '':
+        r = ''
+        for i, c in enumerate(l.zfill(4)):
+            d = int(c)
+            if d == 0:
+                continue
+            for j in v[i]:
+                if d >= j:
+                    r += s[i][v[i].index(j)]
+                    d -= j
+        print(l, r)
+        l = f.readline().strip()