diff --git a/LibrariesAndOptimizations/README.md b/LibrariesAndOptimizations/README.md
new file mode 100644
index 0000000..e6cf209
--- /dev/null
+++ b/LibrariesAndOptimizations/README.md
@@ -0,0 +1,10 @@
+# Instructions for building
+
+### Step-by-step building
+`gcc -c bubble_sort.s -o bubble_sort.o`
+`gcc -c main.c -o main.o`
+`gcc main.o bubble_sort.o -o program`
+`program`
+
+### Build with a single command
+`gcc main.c bubble_sort.s -o program && program`
diff --git a/LibrariesAndOptimizations/bubble_sort.s b/LibrariesAndOptimizations/bubble_sort.s
new file mode 100644
index 0000000..9ef9995
--- /dev/null
+++ b/LibrariesAndOptimizations/bubble_sort.s
@@ -0,0 +1,146 @@
+	.file	"bubble_sort.c"
+	.text
+	.globl	bubbleSort
+	.def	bubbleSort;	.scl	2;	.type	32;	.endef
+	.seh_proc	bubbleSort
+bubbleSort:
+	pushq	%rbp
+	.seh_pushreg	%rbp
+	movq	%rsp, %rbp
+	.seh_setframe	%rbp, 0
+	subq	$48, %rsp
+	.seh_stackalloc	48
+	.seh_endprologue
+	movl	%ecx, 16(%rbp)
+	movq	%rdx, 24(%rbp)
+	movq	%rsp, %rax
+	movq	%rax, %r8
+	movl	16(%rbp), %eax
+	subq	$1, %rax
+	movq	%rax, -32(%rbp)
+	movl	16(%rbp), %eax
+	salq	$2, %rax
+	addq	$15, %rax
+	shrq	$4, %rax
+	salq	$4, %rax
+	call	___chkstk_ms
+	subq	%rax, %rsp
+	movq	%rsp, %rax
+	addq	$3, %rax
+	shrq	$2, %rax
+	salq	$2, %rax
+	movq	%rax, -40(%rbp)
+	movl	$0, -4(%rbp)
+	jmp	.L2
+.L3:
+	movl	-4(%rbp), %eax
+	cltq
+	leaq	0(,%rax,4), %rdx
+	movq	24(%rbp), %rax
+	addq	%rdx, %rax
+	movl	(%rax), %ecx
+	movq	-40(%rbp), %rax
+	movl	-4(%rbp), %edx
+	movslq	%edx, %rdx
+	movl	%ecx, (%rax,%rdx,4)
+	addl	$1, -4(%rbp)
+.L2:
+	movl	-4(%rbp), %eax
+	cmpl	16(%rbp), %eax
+	jb	.L3
+	movl	$0, -8(%rbp)
+	jmp	.L4
+.L8:
+	movl	$0, -12(%rbp)
+	jmp	.L5
+.L7:
+	movl	-12(%rbp), %eax
+	cltq
+	leaq	0(,%rax,4), %rdx
+	movq	24(%rbp), %rax
+	addq	%rdx, %rax
+	movl	(%rax), %edx
+	movl	-12(%rbp), %eax
+	cltq
+	addq	$1, %rax
+	leaq	0(,%rax,4), %rcx
+	movq	24(%rbp), %rax
+	addq	%rcx, %rax
+	movl	(%rax), %eax
+	cmpl	%eax, %edx
+	jle	.L6
+	movl	-12(%rbp), %eax
+	cltq
+	leaq	0(,%rax,4), %rdx
+	movq	24(%rbp), %rax
+	addq	%rdx, %rax
+	movl	(%rax), %eax
+	movl	%eax, -44(%rbp)
+	movl	-12(%rbp), %eax
+	cltq
+	addq	$1, %rax
+	leaq	0(,%rax,4), %rdx
+	movq	24(%rbp), %rax
+	addq	%rdx, %rax
+	movl	-12(%rbp), %edx
+	movslq	%edx, %rdx
+	leaq	0(,%rdx,4), %rcx
+	movq	24(%rbp), %rdx
+	addq	%rcx, %rdx
+	movl	(%rax), %eax
+	movl	%eax, (%rdx)
+	movl	-12(%rbp), %eax
+	cltq
+	addq	$1, %rax
+	leaq	0(,%rax,4), %rdx
+	movq	24(%rbp), %rax
+	addq	%rax, %rdx
+	movl	-44(%rbp), %eax
+	movl	%eax, (%rdx)
+.L6:
+	addl	$1, -12(%rbp)
+.L5:
+	movl	-8(%rbp), %eax
+	movl	16(%rbp), %edx
+	subl	%eax, %edx
+	leal	-1(%rdx), %eax
+	movl	-12(%rbp), %edx
+	cmpl	%eax, %edx
+	jb	.L7
+	addl	$1, -8(%rbp)
+.L4:
+	movl	16(%rbp), %eax
+	subl	$1, %eax
+	movl	-8(%rbp), %edx
+	cmpl	%eax, %edx
+	jb	.L8
+	movl	$0, -16(%rbp)
+	movl	$0, -20(%rbp)
+	jmp	.L9
+.L11:
+	movq	-40(%rbp), %rax
+	movl	-20(%rbp), %edx
+	movslq	%edx, %rdx
+	movl	(%rax,%rdx,4), %edx
+	movl	-20(%rbp), %eax
+	cltq
+	leaq	0(,%rax,4), %rcx
+	movq	24(%rbp), %rax
+	addq	%rcx, %rax
+	movl	(%rax), %eax
+	cmpl	%eax, %edx
+	je	.L10
+	addl	$1, -16(%rbp)
+.L10:
+	addl	$1, -20(%rbp)
+.L9:
+	movl	-20(%rbp), %eax
+	cmpl	16(%rbp), %eax
+	jb	.L11
+	movl	-16(%rbp), %eax
+	movq	%r8, %rsp
+	movq	%rbp, %rsp
+	popq	%rbp
+	ret
+	.seh_endproc
+	.ident	"GCC: (Rev8, Built by MSYS2 project) 15.2.0"
diff --git a/LibrariesAndOptimizations/main.c b/LibrariesAndOptimizations/main.c
new file mode 100644
index 0000000..2205c76
--- /dev/null
+++ b/LibrariesAndOptimizations/main.c
@@ -0,0 +1,40 @@
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+
+extern int bubbleSort(unsigned int, int[]);
+
+int main(void) {
+    char userInput[2048];
+    scanf("%2047[^\n]", userInput);
+
+    int numbers[100];
+
+    unsigned short numbersLength = 0;
+    const char* token = strtok(userInput, " ");
+    while (token != NULL) {
+        char* endPtr;
+        numbers[numbersLength] = strtol(token, &endPtr, 10);
+        ++numbersLength;
+        token = strtok(NULL, " ");
+    }
+
+
+    printf("Original array: { ");
+    for (int index = 0; index < numbersLength; ++index) {
+        printf("%d ", numbers[index]);
+    }
+    printf("}\n");
+
+    const int permutations = bubbleSort(numbersLength, numbers);
+
+    printf("Sorted array: { ");
+    for (int index = 0; index < numbersLength; ++index) {
+        printf("%d ", numbers[index]);
+    }
+    printf("}\n");
+    printf("Number of permutations: %d\n", permutations);
+
+    return 0;
+}
+