added app.py

app.py

@@ -0,0 +1,31 @@
+import gradio as gr
+def romanToInt(s):
+    """
+    :type s: str
+    :rtype: int
+    """
+    num = {
+        'I':1, 'V':5, 'X':10, 'L':50, 'C':100, 'D':500, 'M':1000
+    }
+    value = 0
+    i = 0
+    while i < len(s)-1:
+        
+        if num[s[i]] < num[s[i+1]]:
+            value += num[s[i+1]] - num[s[i]]
+            i += 2
+        else:
+            value += num[s[i]]
+            i += 1
+    if i == len(s)-1:
+        value += num[s[i]]
+    return value
+
+interface = gr.Interface(
+    fn=romanToInt,
+    inputs=gr.Textbox(label="Roman Number"),
+    outputs=gr.Number(label="Integer"),
+    title="Roman to Integer",
+    description="Please enter Roman numerals (I, V, X, L, C, D, M) in uppercase."
+)
+interface.launch()