diff --git a/c++/pigeonholesort.cpp b/c++/pigeonholesort.cpp
new file mode 100644
index 0000000..06fa98e
--- /dev/null
+++ b/c++/pigeonholesort.cpp
@@ -0,0 +1,44 @@
+#include <bits/stdc++.h>
+using namespace std;
+#define fast ios_base::sync_with_stdio(0); cin.tie(NULL);cout.tie(NULL);
+
+void pigeonsort(int arr, int n){
+int min= *min_element(arr,arr+n);
+int max=*max_element(arr,arr+n);
+int range= max-min+1;
+vector <int> v;
+for (int i = 0; i < n; i++)
+        v[arr[i] - min].push_back(arr[i]);
+
+        int t=0;
+        for (int i = 0; i < range; i++) {
+        vector<int>::iterator it;
+        for (it = v[i].begin(); it != v[i].end(); ++it)
+            arr[index++] = *it;
+    }
+
+
+for(int i=0;i<n;i++){cout<<arr[i];}
+
+
+
+
+}
+
+
+
+
+
+int main(){
+fast
+int n;
+cin>>n;
+int arr[n];
+for(int i=0;i<n;i++){
+    cin>>arr[i];
+}
+pigeonsort(arr,n);
+
+
+    return 0;
+}
\ No newline at end of file
diff --git a/c++/pigeonholesorting.cpp b/c++/pigeonholesorting.cpp
new file mode 100644
index 0000000..e69de29
diff --git a/csoc-2021-algorithms b/csoc-2021-algorithms
new file mode 160000
index 0000000..98db0db
--- /dev/null
+++ b/csoc-2021-algorithms
@@ -0,0 +1 @@
+Subproject commit 98db0db7c4ec4c623ed7572927b79e4d0c6efbb6