binary to decimal python

java/paranthesismatching.java

@@ -0,0 +1,33 @@
+package com.company.Stacks;
+
+import java.util.Scanner;
+
+public class ParenthesisMatching {
+
+    public static boolean parenthesisMatch(String exp, CharStack st){
+        for (int i = 0; i < exp.length(); i++) {
+            if (exp.charAt(i) == '('){
+                st.push("(");
+            }
+            else if (exp.charAt(i) == ')'){
+                if (st.isEmpty()){
+                    return false;
+                }
+                st.pop();
+            }
+        }
+        return st.isEmpty();
+    }
+
+    public static void main(String[] args) {
+        Scanner sc = new Scanner(System.in);
+        String exp = sc.nextLine();
+        CharStack st = new CharStack(exp.length());
+        if (parenthesisMatch(exp, st)){
+            System.out.println("Parenthesis Match");
+        }
+        else{
+            System.out.println("Parenthesis Missing");
+        }
+    }
+}

python/binarytodecimal.py

@@ -0,0 +1,10 @@
+def bin_to_dec(x):
+    l=list(x)
+    l=list(map(int,l))
+    bin=j=0
+    for i in range(len(l)-1,-1,-1):
+        bin+=l[i]*2**j
+        j+=1
+    return bin
+x=input("Enter a Binary Number: ")
+print(bin_to_dec(x))