diff --git a/Sorting/9Ex/main.c b/Sorting/9Ex/main.c
new file mode 100644
index 0000000..8442986
--- /dev/null
+++ b/Sorting/9Ex/main.c
@@ -0,0 +1,96 @@
+#include <stdio.h>
+#include "seagwithsob.h"
+
+int main() {
+    // Тест 1: Набор чисел в обычном порядке
+    double array1[] = {10.0, 9.00001, 8.0001, 7.001, 6.01, 5.1};
+    int length1 = sizeof(array1) / sizeof(array1[0]);
+
+    printf("Test 1 - Original array:\n");
+    for (int i = 0; i < length1; i++) {
+        printf("%lf ", array1[i]);
+    }
+    printf("\n");
+
+    sort(array1, length1);
+
+    printf("Test 1 - Sorted array:\n");
+    for (int i = 0; i < length1; i++) {
+        printf("%lf ", array1[i]);
+    }
+    printf("\n\n");
+
+    // Тест 2: Все числа одинаковые
+    double array2[] = {1.0, 1.0, 1.0, 1.0};
+    int length2 = sizeof(array2) / sizeof(array2[0]);
+
+    printf("Test 2 - Original array:\n");
+    for (int i = 0; i < length2; i++) {
+        printf("%lf ", array2[i]);
+    }
+    printf("\n");
+
+    sort(array2, length2);
+
+    printf("Test 2 - Sorted array:\n");
+    for (int i = 0; i < length2; i++) {
+        printf("%lf ", array2[i]);
+    }
+    printf("\n\n");
+
+    // Тест 3: Набор чисел с отрицательными значениями
+    double array3[] = {-3.0, -1.5, -7.2, 2.1, 0.0};
+    int length3 = sizeof(array3) / sizeof(array3[0]);
+
+    printf("Test 3 - Original array:\n");
+    for (int i = 0; i < length3; i++) {
+        printf("%lf ", array3[i]);
+    }
+    printf("\n");
+
+    sort(array3, length3);
+
+    printf("Test 3 - Sorted array:\n");
+    for (int i = 0; i < length3; i++) {
+        printf("%lf ", array3[i]);
+    }
+    printf("\n\n");
+
+    // Тест 4: Набор чисел с разной экспонентой
+    double array4[] = {1e-10, 1e+10, 1.0, 1e-5, 1e+5};
+    int length4 = sizeof(array4) / sizeof(array4[0]);
+
+    printf("Test 4 - Original array:\n");
+    for (int i = 0; i < length4; i++) {
+        printf("%e ", array4[i]);
+    }
+    printf("\n");
+
+    sort(array4, length4);
+
+    printf("Test 4 - Sorted array:\n");
+    for (int i = 0; i < length4; i++) {
+        printf("%e ", array4[i]);
+    }
+    printf("\n\n");
+
+    // Тест 5: Граничные значения (минимальное и максимальное double)
+    double array5[] = {1e-308, 1e+308, 0.0, -1e-308, -1e+308};
+    int length5 = sizeof(array5) / sizeof(array5[0]);
+
+    printf("Test 5 - Original array:\n");
+    for (int i = 0; i < length5; i++) {
+        printf("%e ", array5[i]);
+    }
+    printf("\n");
+
+    sort(array5, length5);
+
+    printf("Test 5 - Sorted array:\n");
+    for (int i = 0; i < length5; i++) {
+        printf("%e ", array5[i]);
+    }
+    printf("\n");
+
+    return 0;
+}
diff --git a/Sorting/9Ex/makefile b/Sorting/9Ex/makefile
new file mode 100644
index 0000000..1141a15
--- /dev/null
+++ b/Sorting/9Ex/makefile
@@ -0,0 +1,4 @@
+all:
+	gcc -c main.c seagwithsob.c
+	gcc main.o seagwithsob.o && del *.o
+	a.exe
\ No newline at end of file
diff --git a/Sorting/9Ex/seagwithsob.c b/Sorting/9Ex/seagwithsob.c
new file mode 100644
index 0000000..d3a1c29
--- /dev/null
+++ b/Sorting/9Ex/seagwithsob.c
@@ -0,0 +1,33 @@
+#include "seagwithsob.h"
+
+void sort(double * array, int length) {
+       double zero[length];
+       double unit[length];
+       int index;
+       
+       for (int j = 0; j < 63; ++j) {
+	       index = 0;	
+
+	       for (int i = 0; i < length; ++i) {
+		       if ((*(unsigned long long*)&array[i] >> j) & 1) unit[index++] = array[i];
+		       else zero[i - index] = array[i];
+	       }
+
+	       rewrite(array, zero, length - index, unit, index);
+       }
+       
+       index = 0;	
+
+       for (int i = 0; i < length; ++i) {
+	       if ((*(unsigned long long*)&array[i] >> 63) & 1) unit[index++] = array[i];
+	       else zero[i - index] = array[i];
+       }
+
+       for (int i = 0; i < index; ++i) array[i] = unit[index - i - 1];
+       for (int i = index; i < length; ++i) array[i] = zero[i - index];
+}
+
+void rewrite(double * array, double * zero, int len_zero, double * unit, int len_unit) {
+	for (int i = 0; i < len_zero; ++i) array[i] = zero[i];
+	for (int i = len_zero; i < len_zero + len_unit; ++i) array[i] = unit[i - len_zero];
+}
diff --git a/Sorting/9Ex/seagwithsob.h b/Sorting/9Ex/seagwithsob.h
new file mode 100644
index 0000000..ada5c4a
--- /dev/null
+++ b/Sorting/9Ex/seagwithsob.h
@@ -0,0 +1,9 @@
+#ifndef SEAGWITHSOB
+#define SEAGWITHSOB
+
+#include <string.h>
+
+void sort(double * array, int length);
+void rewrite(double * array, double * zero, int len_zero, double * unit, int len_unit);
+
+#endif