diff --git a/I2.cpp b/I2.cpp
new file mode 100644
index 0000000..ab38436
--- /dev/null
+++ b/I2.cpp
@@ -0,0 +1,44 @@
+#include <iostream>
+
+long long Partition(long long a[], long long left, long long right) {
+  long long pivot = a[(left + right) / 2];
+  long long i = left;
+  long long j = right;
+  while(i <= j) {
+    while (a[i] < pivot) {
+      i++;
+    }
+    while (a[j] > pivot) {
+      j--;
+    }
+    if (i >= j) break;
+    std::swap(a[i], a[j]);
+    i++;
+    j--;
+  }
+  return j;
+}
+
+void QuickSort(long long a[], long long left, long long right) {
+  if (left < right) {
+    int pivot = Partition(a, left, right);
+    QuickSort(a, left, pivot);
+    QuickSort(a, pivot + 1, right);
+  }
+}
+
+int main() {
+  std::ios_base::sync_with_stdio(false);
+  std::cin.tie(NULL);
+  int n;
+  std::cin >> n;
+  long long* buffer = new long long[n];
+  for (int i = 0; i < n; i++) {
+    std::cin >> buffer[i];
+  }
+  QuickSort(buffer, 0, n - 1);
+  for (int i = 0; i < n; i++){
+    std::cout<<buffer[i]<<" ";
+  }
+  delete[] buffer;
+}
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