diff --git a/dn2/Makefile b/dn2/Makefile
index 3ff03d1..530e632 100644
--- a/dn2/Makefile
+++ b/dn2/Makefile
@@ -1,5 +1,5 @@
 CC=gcc
-CFLAGS=-g -Wall -lpthread
+CFLAGS=-g -Wall -lpthread -fopenmp
 
 all: server
 
diff --git a/dn2/server b/dn2/server
index 99371ff..b07383f 100755
Binary files a/dn2/server and b/dn2/server differ
diff --git a/dn2/server.c b/dn2/server.c
index dbe7818..9ff2834 100644
--- a/dn2/server.c
+++ b/dn2/server.c
@@ -1,17 +1,20 @@
 #include<stdio.h>
 #include <pthread.h> 
+#include <omp.h>
+#include <stdlib.h>
+#include <unistd.h>
 
 #define N_THREADS 1
-#define N_STEPS 1
-#define N_NUMBERS_CALCULATED 2000
+#define N_STEPS 200
+#define N_NUMBERS_CALCULATED 100000
 
-typedef struct _IntervalInfo {
-  int start;
-  int end;
-} IntervalInfo;
+pthread_mutex_t lock = PTHREAD_MUTEX_INITIALIZER;
+pthread_spinlock_t alive_threads_lock;
+pthread_spinlock_t produced_numbers_lock;
 
-int friendly_numbers[N_NUMBERS_CALCULATED];
+int amicable_numbers[N_NUMBERS_CALCULATED];
 long produced = 0;
+int threads_alive = 0;
 
 int calculate_amicable_number(int number) {
     for(int i=1; i< number; i++){
@@ -23,15 +26,65 @@ int calculate_amicable_number(int number) {
 }
 
 void *calculate_amicable_number_invterval(void * arg) {
+	int *myrank = (int *)arg;
+	long mystart = (int)(N_NUMBERS_CALCULATED/ (double)N_THREADS * *myrank);
+	long myend = (int)(N_NUMBERS_CALCULATED / (double)N_THREADS * (*myrank + 1));
+  
+  for(int i = mystart; i < myend; i++) {
+    amicable_numbers[i] = calculate_amicable_number(i);
+  }
+
   return NULL;
 }
 
+int not_all_numbers_calculated() {
+  int ret = 0;
+  pthread_spin_lock(&produced_numbers_lock);
+  if(produced < N_NUMBERS_CALCULATED)
+    ret = 1;
+  pthread_spin_unlock(&produced_numbers_lock); 
+  return ret;
+}
+
+int is_there_space_for_new_thread() {
+  int ret = 0;
+  pthread_spin_lock(&alive_threads_lock);
+  if (threads_alive < N_THREADS)
+    ret = 1;
+  pthread_spin_unlock(&alive_threads_lock);
+  return ret;
+}
+
 int main() {
-	pthread_t threads[N_NUMBERS_CALCULATED];
+	pthread_spin_init(&alive_threads_lock, PTHREAD_PROCESS_PRIVATE);
+	pthread_spin_init(&produced_numbers_lock, PTHREAD_PROCESS_PRIVATE);
+	pthread_t t[N_THREADS];
+	int p[N_THREADS];
+
+	double dt = omp_get_wtime();
+
+	for (int i = 0; i<N_THREADS; i++)
+	{
+		p[i] = i;
+		pthread_create(&t[i], NULL, calculate_amicable_number_invterval, (void *)&p[i]);
+	}
+
+	for (int i = 0; i<N_THREADS; i++)
+		pthread_join(t[i], NULL);
   
-  for(int i = 0; i < N_THREADS; i++) {
-		 pthread_create(&threads[i], NULL, calculate_amicable_number_invterval, NULL);
+	dt = omp_get_wtime() - dt;
+  
+  for(int i = 0; i < N_NUMBERS_CALCULATED; i++){
+    printf("%d, ", amicable_numbers[i]);
   }
 
+	printf("\nExecution time: %lf\n",  dt);
   return 0;
+
+  /// 10 000 korakov
+  /// 1 THREAD: 14.173247
+  /// 2 THREADS: 10.877419
+  /// 4 THREADS:  6.838137
+  /// 8 THREADS:  5.327306
+  /// 16 THREADS: 3.964736
 }
diff --git a/dn2/server1.c b/dn2/server1.c
new file mode 100644
index 0000000..b85b0df
--- /dev/null
+++ b/dn2/server1.c
@@ -0,0 +1,115 @@
+#include<stdio.h>
+#include <pthread.h> 
+#include <omp.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+#define N_THREADS 5
+#define N_STEPS 200
+#define N_NUMBERS_CALCULATED 10000
+
+pthread_mutex_t lock = PTHREAD_MUTEX_INITIALIZER;
+pthread_spinlock_t alive_threads_lock;
+pthread_spinlock_t produced_numbers_lock;
+
+int amicable_numbers[N_NUMBERS_CALCULATED];
+long produced = 0;
+int threads_alive = 0;
+
+int calculate_amicable_number(int number) {
+    for(int i=1; i< number; i++){
+        if(number % i == 0){
+            number = number + i;
+        }
+    }
+    return number;
+}
+
+void *calculate_amicable_number_invterval(void * arg) {
+  int start = *((int *)arg);
+  int calculated = 0;
+  int h = 0;
+
+  for(int i = 0; i < N_STEPS; i++){ 
+    calculated = calculate_amicable_number(start + i);
+    h++;
+    if (start + i < N_NUMBERS_CALCULATED) {
+      amicable_numbers[start +i] = calculated;
+    } else {
+	    pthread_spin_lock(&alive_threads_lock);
+      threads_alive--;
+      printf("My thread start was: %d and I calculated %d numbers\n", start, h);
+	    pthread_spin_unlock(&alive_threads_lock);
+      free(arg);
+      return NULL;
+    }
+  }
+
+	pthread_spin_lock(&alive_threads_lock);
+  threads_alive--;
+	pthread_spin_unlock(&alive_threads_lock);
+  printf("my thread start was: %d and i calculated %d numbers\n", start, h);
+  free(arg);
+  return NULL;
+}
+
+int not_all_numbers_calculated() {
+  int ret = 0;
+  pthread_spin_lock(&produced_numbers_lock);
+  if(produced < N_NUMBERS_CALCULATED)
+    ret = 1;
+  pthread_spin_unlock(&produced_numbers_lock); 
+  return ret;
+}
+
+int is_there_space_for_new_thread() {
+  int ret = 0;
+  pthread_spin_lock(&alive_threads_lock);
+  if (threads_alive < N_THREADS)
+    ret = 1;
+  pthread_spin_unlock(&alive_threads_lock);
+  return ret;
+}
+
+int main() {
+	pthread_spin_init(&alive_threads_lock, PTHREAD_PROCESS_PRIVATE);
+	pthread_spin_init(&produced_numbers_lock, PTHREAD_PROCESS_PRIVATE);
+
+  pthread_t thread;
+	double dt = omp_get_wtime();
+  
+  while(not_all_numbers_calculated()){
+
+    if(is_there_space_for_new_thread()) {
+      int *arg = malloc(sizeof(*arg));
+      pthread_spin_lock(&produced_numbers_lock);
+      *arg = produced;
+      pthread_spin_unlock(&produced_numbers_lock);
+      pthread_create(&thread, NULL, calculate_amicable_number_invterval,(void *) arg);
+      pthread_spin_lock(&alive_threads_lock);
+      threads_alive += 1;
+      pthread_spin_unlock(&alive_threads_lock);
+      pthread_spin_lock(&produced_numbers_lock);
+      produced += N_STEPS;
+      pthread_spin_unlock(&produced_numbers_lock);
+    }
+  }
+	dt = omp_get_wtime() - dt;
+  
+  sleep(1);
+  printf("Sleeping 2 seconds, waiting for all threads to finish\n");
+  for(int i = 0; i < N_NUMBERS_CALCULATED; i++){
+    printf("%d, ", amicable_numbers[i]);
+  }
+
+	printf("\nExecution time: %lf\n",  dt);
+  return 0;
+
+  /// 10 000 korakov
+  /// 1 THREAD:  27.789431
+  /// 2 THREADS: 11.234548
+  /// 4 THREADS:  4.232311
+  /// 8 THREADS:  1.551455
+  /// 16 THREADS: 0.605447
+
+}