diff --git a/Codes/1981 B - Turtle and an Infinite Sequence/1981B.cpp b/Codes/1981 B - Turtle and an Infinite Sequence/1981B.cpp
new file mode 100644
index 0000000..f7747e8
--- /dev/null
+++ b/Codes/1981 B - Turtle and an Infinite Sequence/1981B.cpp	
@@ -0,0 +1,32 @@
+#include <bits/stdc++.h>
+using namespace std;
+#define ll long long
+#define endl '\n'
+ll pow(ll x,ll y,ll m=1e9+7){ll ans=1;x%=m;while(y){if(y&1)ans=(ans*x)%m;x=(x*x)%m;y>>=1;}return ans;}
+
+void solve()
+{
+    ll n,m;
+    cin>>n>>m;
+    ll l=max(0LL,n-m), r= n+m, ans=0;
+    for(int i=0; i<32; ++i)
+    {
+        ll p=l/(1<<i);
+        ll q=r/(1<<i);
+        if(p&1 || q&1 || p!=q)
+            ans |= (1<<i);
+    }
+    cout<<ans<<endl;
+}
+
+signed main()
+{
+    ios_base::sync_with_stdio(false), cin.tie(nullptr);
+    int TCS = 1;
+    cin >> TCS;
+    for (int TC = 1; TC <= TCS; ++TC)
+    {
+        // cout<<"Case "<<TC<<": ";
+        solve();
+    }
+}
\ No newline at end of file
diff --git a/Readme.md b/Readme.md
index 8225da2..c9c0312 100644
--- a/Readme.md
+++ b/Readme.md
@@ -329,6 +329,7 @@ This repository contains my solutions of Codeforces problems. They are in C++ la
 | 317 | 1976 A | Verify Password | [Question](https://codeforces.com/problemset/problem/1976/A) | [Solution](https://github.com/ShazidMashrafi/Codeforces-Solutions/tree/master/Codes/1976%20A%20-%20Verify%20Password)
 | 318 | 1976 B | Increase Decrease Copy | [Question](https://codeforces.com/problemset/problem/1976/B) | [Solution](https://github.com/ShazidMashrafi/Codeforces-Solutions/tree/master/Codes/1976%20B%20-%20Increase%20Decrease%20Copy)
 | 319 | 1981 A | Turtle and Piggy Are Playing a Game | [Question](https://codeforces.com/problemset/problem/1981/A) | [Solution](https://github.com/ShazidMashrafi/Codeforces-Solutions/tree/master/Codes/1981%20A%20-%20Turtle%20and%20Piggy%20Are%20Playing%20a%20Game)
+| 320 | 1981 B | Turtle and an Infinite Sequence | [Question](https://codeforces.com/problemset/problem/1981/B) | [Solution](https://github.com/ShazidMashrafi/Codeforces-Solutions/tree/master/Codes/1981%20B%20-%20Turtle%20and%20an%20Infinite%20Sequence)