From b6bb8782169bc0287a404780ee17ea24191633ef Mon Sep 17 00:00:00 2001
From: fabianrobin123 <115490451+fabianrobin123@users.noreply.github.com>
Date: Mon, 10 Oct 2022 22:03:10 +0530
Subject: [PATCH 1/3] Add Binary

Given two binary strInput: a = "11", b = "1"
Output: "100"ings a and b, return their sum as a binary string.
---
 Add Binary | 51 +++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 51 insertions(+)
 create mode 100644 Add Binary

diff --git a/Add Binary b/Add Binary
new file mode 100644
index 0000000..5ec9b8b
--- /dev/null
+++ b/Add Binary	
@@ -0,0 +1,51 @@
+class Solution
+{
+public:
+    string addBinary(string a, string b)
+    {
+        int n1 = a.length();
+        int n2 = b.length();
+        int carry = 0;
+        string s = "";
+        while (n1 > 0 || n2 > 0)
+        {
+            int sum = 0;
+            if (n1 > 0)
+            {
+                sum += a[n1 - 1] - '0';
+                n1--;
+            }
+            if (n2 > 0)
+            {
+                sum += b[n2 - 1] - '0';
+                n2--;
+            }
+            sum += carry;
+            switch (sum)
+            {
+            case 0:
+                carry = 0;
+                s.push_back('0');
+                break;
+            case 1:
+                carry = 0;
+                s.push_back('1');
+                break;
+            case 2:
+                carry = 1;
+                s.push_back('0');
+                break;
+            case 3:
+                carry = 1;
+                s.push_back('1');
+                break;
+            }
+        }
+        if (carry != 0)
+        {
+            s.push_back('1');
+        }
+        reverse(s.begin(), s.end());
+        return s;
+    }
+};

From cf1663227578d64fe994993e269d31bc68e1b5e2 Mon Sep 17 00:00:00 2001
From: fabianrobin123 <115490451+fabianrobin123@users.noreply.github.com>
Date: Mon, 10 Oct 2022 22:06:32 +0530
Subject: [PATCH 2/3] Final Value of Variable After Performing Operations

---
 ...Value of Variable After Performing Operations | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)
 create mode 100644 Final Value of Variable After Performing Operations

diff --git a/Final Value of Variable After Performing Operations b/Final Value of Variable After Performing Operations
new file mode 100644
index 0000000..0e0eb48
--- /dev/null
+++ b/Final Value of Variable After Performing Operations	
@@ -0,0 +1,16 @@
+class Solution {
+public:
+int finalValueAfterOperations(vector& operations) {
+
+    int res = 0 ;
+    
+    for( auto operation : operations ) {
+        if( operation[1] == '+' )
+            res++ ;
+        else
+            res-- ;
+    }
+    
+    return res ;
+}
+};

From 47e4f63ba986cd5596cda10fd48f5020f6e9f703 Mon Sep 17 00:00:00 2001
From: fabianrobin123 <115490451+fabianrobin123@users.noreply.github.com>
Date: Mon, 10 Oct 2022 22:07:47 +0530
Subject: [PATCH 3/3] Sort Characters By Frequency

---
 Sort Characters By Frequency | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)
 create mode 100644 Sort Characters By Frequency

diff --git a/Sort Characters By Frequency b/Sort Characters By Frequency
new file mode 100644
index 0000000..ec58f0b
--- /dev/null
+++ b/Sort Characters By Frequency	
@@ -0,0 +1,22 @@
+class Solution {
+public:
+    string frequencySort(string s) {
+        unordered_map<char,int> mp;
+        for(int i= 0;i< s.length(); i++){
+            mp[s[i]]++;
+        }
+        priority_queue<pair<int,char>>pq;
+        for(auto i : mp){
+            pq.push({i.second,i.first});
+        }
+        string ans = "";
+        while(!pq.empty()){
+            pair<int,char> p = pq.top();
+            pq.pop();
+            while(p.first--){
+                ans+=p.second;
+            }
+        }
+        return ans;
+    }
+};