diff --git a/.DS_Store b/.DS_Store
new file mode 100644
index 0000000..911bcc8
Binary files /dev/null and b/.DS_Store differ
diff --git a/Number theory-1/.vscode/c_cpp_properties.json b/Number theory-1/.vscode/c_cpp_properties.json
new file mode 100644
index 0000000..980fd57
--- /dev/null
+++ b/Number theory-1/.vscode/c_cpp_properties.json	
@@ -0,0 +1,18 @@
+{
+  "configurations": [
+    {
+      "name": "macos-clang-arm64",
+      "includePath": [
+        "${workspaceFolder}/**"
+      ],
+      "compilerPath": "/usr/bin/clang",
+      "cStandard": "${default}",
+      "cppStandard": "${default}",
+      "intelliSenseMode": "macos-clang-arm64",
+      "compilerArgs": [
+        ""
+      ]
+    }
+  ],
+  "version": 4
+}
\ No newline at end of file
diff --git a/Number theory-1/.vscode/launch.json b/Number theory-1/.vscode/launch.json
new file mode 100644
index 0000000..cbe52a3
--- /dev/null
+++ b/Number theory-1/.vscode/launch.json	
@@ -0,0 +1,13 @@
+{
+  "version": "0.2.0",
+  "configurations": [
+    {
+      "name": "C/C++ Runner: Debug Session",
+      "type": "lldb",
+      "request": "launch",
+      "args": [],
+      "cwd": "/Users/amitgoel/Documents/open source contributions/Coding-Ninjas-Competitive-Programming/Number theory-1",
+      "program": "/Users/amitgoel/Documents/open source contributions/Coding-Ninjas-Competitive-Programming/Number theory-1/build/Debug/outDebug"
+    }
+  ]
+}
\ No newline at end of file
diff --git a/Number theory-1/.vscode/settings.json b/Number theory-1/.vscode/settings.json
new file mode 100644
index 0000000..3ad35cc
--- /dev/null
+++ b/Number theory-1/.vscode/settings.json	
@@ -0,0 +1,35 @@
+{
+  "C_Cpp_Runner.cCompilerPath": "clang",
+  "C_Cpp_Runner.cppCompilerPath": "clang++",
+  "C_Cpp_Runner.debuggerPath": "lldb",
+  "C_Cpp_Runner.cStandard": "",
+  "C_Cpp_Runner.cppStandard": "",
+  "C_Cpp_Runner.msvcBatchPath": "",
+  "C_Cpp_Runner.useMsvc": false,
+  "C_Cpp_Runner.warnings": [
+    "-Wall",
+    "-Wextra",
+    "-Wpedantic",
+    "-Wshadow",
+    "-Wformat=2",
+    "-Wconversion",
+    "-Wnull-dereference"
+  ],
+  "C_Cpp_Runner.enableWarnings": true,
+  "C_Cpp_Runner.warningsAsError": false,
+  "C_Cpp_Runner.compilerArgs": [],
+  "C_Cpp_Runner.linkerArgs": [],
+  "C_Cpp_Runner.includePaths": [],
+  "C_Cpp_Runner.includeSearch": [
+    "*",
+    "**/*"
+  ],
+  "C_Cpp_Runner.excludeSearch": [
+    "**/build",
+    "**/build/**",
+    "**/.*",
+    "**/.*/**",
+    "**/.vscode",
+    "**/.vscode/**"
+  ]
+}
\ No newline at end of file
diff --git a/Number theory-1/GCD.cpp b/Number theory-1/GCD.cpp
index c9fbb46..338ec88 100644
--- a/Number theory-1/GCD.cpp	
+++ b/Number theory-1/GCD.cpp	
@@ -34,8 +34,14 @@ ll gcd(ll x, ll y)
     return gcd(y, x%y);   
 }
 int main()
-{
-    ll x, y;
-    cin>>x>>y;
-    cout<<gcd(x, y)<<endl;
+{   
+    int numTest;
+    cin>> numTest;
+
+    for(int i = 0; i< numTest; i++){
+        ll x, y;
+        cin>>x>>y;
+        cout<<gcd(x, y)<<endl;
+    }
+    
 }
\ No newline at end of file