diff --git a/lab_2/Makefile b/lab_2/Makefile
index d2e096a..294e6b9 100644
--- a/lab_2/Makefile
+++ b/lab_2/Makefile
@@ -1,27 +1,37 @@
-# Makefile
 CC = gcc
 CFLAGS = -Wall -Wextra -std=c99
-LDFLAGS = -ldl
+LDFLAGS =
 
-# Цель по умолчанию
-all: task12 libtextlib.so
+# Static build
+static: main_static
 
-# Основная программа
-task12: task12.c
-	$(CC) $(CFLAGS) -o $@ $< $(LDFLAGS)
+main_static: main_static.o textlib_static.o
+	$(CC) $(CFLAGS) -o $@ main_static.o textlib_static.o
 
-# Динамическая библиотека
-libtextlib.so: textlib.c
-	$(CC) $(CFLAGS) -fPIC -shared -o $@ $<
+main_static.o: main_static.c textlib_static.h
+	$(CC) $(CFLAGS) -c -o $@ main_static.c
 
-# Очистка
+textlib_static.o: textlib_static.c textlib_static.h
+	$(CC) $(CFLAGS) -c -o $@ textlib_static.c
+
+# Dynamic build
+dynamic: main_dynamic libtextlib.so
+
+main_dynamic: main_dynamic.o
+	$(CC) $(CFLAGS) -o $@ main_dynamic.o -ldl
+
+main_dynamic.o: main_dynamic.c
+	$(CC) $(CFLAGS) -c -o $@ main_dynamic.c
+
+libtextlib.so: textlib_dynamic.c
+	$(CC) $(CFLAGS) -fPIC -shared -o $@ textlib_dynamic.c
+
+# Build both
+all: static dynamic
+
+# Clean
 clean:
-	rm -f task12 libtextlib.so input.txt output.txt
+	rm -f *.o main_static main_dynamic libtextlib.so out.txt
+	@echo "Cleaned build artifacts."
 
-# Тест
-test: all
-	echo -e "Hello world\ntest line\nanother" > input.txt
-	./task12 input.txt output.txt 5 ./libtextlib.so
-	cat output.txt
-
-.PHONY: all clean test
+.PHONY: all static dynamic clean
\ No newline at end of file
diff --git a/lab_2/in.txt b/lab_2/in.txt
new file mode 100644
index 0000000..2d15f49
--- /dev/null
+++ b/lab_2/in.txt
@@ -0,0 +1,5 @@
+abbaabbaabbaabbaabbaabbaabbaabba
+xyzx
+ ..
+.. ./.
+----
diff --git a/lab_2/main_dynamic.c b/lab_2/main_dynamic.c
new file mode 100644
index 0000000..cc2d435
--- /dev/null
+++ b/lab_2/main_dynamic.c
@@ -0,0 +1,47 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <dlfcn.h>
+
+#define MAX_LINE 4096
+
+typedef int (*replace_func_t)(char*, int, int*);
+
+int main(int argc, char *argv[]) {
+    if (argc != 5) {
+        fprintf(stderr, "Usage: %s <input.txt> <output.txt> <max_replacements> <libpath>\n", argv[0]);
+        return 1;
+    }
+    FILE *fin = fopen(argv[1], "r");
+    if (!fin) { perror("fopen input"); return 1; }
+    FILE *fout = fopen(argv[2], "w");
+    if (!fout) { perror("fopen output"); fclose(fin); return 1; }
+    int cap = atoi(argv[3]);
+    if (cap < 0) { fprintf(stderr, "invalid cap\n"); fclose(fin); fclose(fout); return 1; }
+
+    void *lib = dlopen(argv[4], RTLD_LAZY);
+    if (!lib) { fprintf(stderr, "dlopen error: %s\n", dlerror()); fclose(fin); fclose(fout); return 1; }
+    replace_func_t replace = (replace_func_t) dlsym(lib, "replace_char_line");
+    if (!replace) { fprintf(stderr, "dlsym error: %s\n", dlerror()); fclose(fin); fclose(fout); dlclose(lib); return 1; }
+
+    int total = 0;
+    char line[MAX_LINE];
+    while (fgets(line, sizeof(line), fin) && cap > 0) {
+        if (line[0] == '\0' || line[0] == '\n') {
+            fputs(line, fout);
+            continue;
+        }
+        int key = (unsigned char)line[0];
+        int repl_line = replace(line + 1, key, &cap);
+        total += repl_line;
+        fputc(line[0], fout);
+        fputs(line + 1, fout);
+    }
+    while (fgets(line, sizeof(line), fin)) {
+        fputs(line, fout);
+    }
+    fclose(fin); fclose(fout);
+    dlclose(lib);
+    printf("total_replacements: %d\n", total);
+    return 0;
+}
\ No newline at end of file
diff --git a/lab_2/main_static.c b/lab_2/main_static.c
new file mode 100644
index 0000000..c2b645c
--- /dev/null
+++ b/lab_2/main_static.c
@@ -0,0 +1,39 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include "textlib_static.h"
+
+#define MAX_LINE 4096
+
+int main(int argc, char *argv[]) {
+    if (argc != 4) {
+        fprintf(stderr, "Usage: %s <input.txt> <output.txt> <max_replacements>\n", argv[0]);
+        return 1;
+    }
+    FILE *fin = fopen(argv[1], "r");
+    if (!fin) { perror("fopen input"); return 1; }
+    FILE *fout = fopen(argv[2], "w");
+    if (!fout) { perror("fopen output"); fclose(fin); return 1; }
+    int cap = atoi(argv[3]);
+    if (cap < 0) { fprintf(stderr, "invalid cap\n"); fclose(fin); fclose(fout); return 1; }
+
+    int total = 0;
+    char line[MAX_LINE];
+    while (fgets(line, sizeof(line), fin) && cap > 0) {
+        if (line[0] == '\0' || line[0] == '\n') {
+            fputs(line, fout);
+            continue;
+        }
+        int key = (unsigned char)line[0];
+        int repl_line = replace_char_line(line + 1, key, &cap);
+        total += repl_line;
+        fputc(line[0], fout);
+        fputs(line + 1, fout);
+    }
+    while (fgets(line, sizeof(line), fin)) {
+        fputs(line, fout);
+    }
+    fclose(fin); fclose(fout);
+    printf("total_replacements: %d\n", total);
+    return 0;
+}
\ No newline at end of file
diff --git a/lab_2/old/Makefile b/lab_2/old/Makefile
new file mode 100644
index 0000000..d2e096a
--- /dev/null
+++ b/lab_2/old/Makefile
@@ -0,0 +1,27 @@
+# Makefile
+CC = gcc
+CFLAGS = -Wall -Wextra -std=c99
+LDFLAGS = -ldl
+
+# Цель по умолчанию
+all: task12 libtextlib.so
+
+# Основная программа
+task12: task12.c
+	$(CC) $(CFLAGS) -o $@ $< $(LDFLAGS)
+
+# Динамическая библиотека
+libtextlib.so: textlib.c
+	$(CC) $(CFLAGS) -fPIC -shared -o $@ $<
+
+# Очистка
+clean:
+	rm -f task12 libtextlib.so input.txt output.txt
+
+# Тест
+test: all
+	echo -e "Hello world\ntest line\nanother" > input.txt
+	./task12 input.txt output.txt 5 ./libtextlib.so
+	cat output.txt
+
+.PHONY: all clean test
diff --git a/lab_2/task12.c b/lab_2/old/task12.c
similarity index 100%
rename from lab_2/task12.c
rename to lab_2/old/task12.c
diff --git a/lab_2/textlib.c b/lab_2/old/textlib.c
similarity index 100%
rename from lab_2/textlib.c
rename to lab_2/old/textlib.c
diff --git a/lab_2/textlib_dynamic.c b/lab_2/textlib_dynamic.c
new file mode 100644
index 0000000..950efc9
--- /dev/null
+++ b/lab_2/textlib_dynamic.c
@@ -0,0 +1,15 @@
+#include <string.h>
+
+int replace_char_line(char *buf, int key, int *replacements_left) {
+    int replaced = 0;
+    for (size_t i = 0; buf[i] != '\0'; i++) {
+        if ((unsigned char)buf[i] == (unsigned char)key &&
+            *replacements_left > 0 &&
+            buf[i] != '\n') {
+            buf[i] = ' ';
+            replaced++;
+            (*replacements_left)--;
+            }
+    }
+    return replaced;
+}
diff --git a/lab_2/textlib_static.c b/lab_2/textlib_static.c
new file mode 100644
index 0000000..c3bba60
--- /dev/null
+++ b/lab_2/textlib_static.c
@@ -0,0 +1,16 @@
+#include "textlib_static.h"
+#include <string.h>
+
+int replace_char_line(char *buf, int key, int *replacements_left) {
+    int replaced = 0;
+    for (size_t i = 0; buf[i] != '\0'; i++) {
+        if ((unsigned char)buf[i] == (unsigned char)key &&
+            *replacements_left > 0 &&
+            buf[i] != '\n') {
+            buf[i] = ' ';
+            replaced++;
+            (*replacements_left)--;
+            }
+    }
+    return replaced;
+}
diff --git a/lab_2/textlib_static.h b/lab_2/textlib_static.h
new file mode 100644
index 0000000..239b283
--- /dev/null
+++ b/lab_2/textlib_static.h
@@ -0,0 +1,6 @@
+#ifndef TEXTLIB_STATIC_H
+#define TEXTLIB_STATIC_H
+
+int replace_char_line(char *buf, int key, int *replacements_left);
+
+#endif // TEXTLIB_STATIC_H