diff --git a/OS/server b/OS/server
new file mode 100644
index 0000000..2d7a7c1
Binary files /dev/null and b/OS/server differ
diff --git a/OS/server.c b/OS/server.c
new file mode 100644
index 0000000..6f18e74
--- /dev/null
+++ b/OS/server.c
@@ -0,0 +1,63 @@
+#include <netinet/in.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/socket.h>
+#include <unistd.h>
+
+#define LINESIZE 128
+
+void error(char *msg){
+    perror(msg);
+    exit(1);
+}
+
+int main (int argc, char *argv[]){
+    int sockfd;
+    int newsockfd;
+    int portno;
+    int clilen;
+    int n;
+    char buffer[LINESIZE];
+    struct sockaddr_in serv_addr;
+    struct sockaddr_in cli_addr;
+    if (argc < 2){
+        fprintf(stderr, "ERROR, no port provided\n");
+        exit(1);
+    }
+
+    sockfd = socket(PF_INET, SOCK_STREAM, 0);
+    if (sockfd < 0){
+        error("ERROR opening socket");
+    }
+
+    bzero((char *)&serv_addr, sizeof(serv_addr));
+    portno = atoi(argv[1]);
+    serv_addr.sin_family = AF_INET;
+    serv_addr.sin_addr.s_addr = INADDR_ANY;
+    serv_addr.sin_port = htons(portno);
+    printf("Server is waiting for the message, please wait...\n");
+
+    if (bind(sockfd, (struct sockaddr *)&serv_addr, sizeof (serv_addr)) < 0){
+        error("ERROR on binding");
+    }
+
+    listen(sockfd, 5);
+    clilen = sizeof(cli_addr);
+
+    newsockfd = accept(sockfd, (struct sockaddr *)&cli_addr, &clilen);
+    if (newsockfd < 0){
+        error("ERROR on accept");
+    }
+    bzero(buffer, LINESIZE);
+    n = read(newsockfd, buffer, LINESIZE);
+    if (n < 0){
+        error("ERROR reading from socket");
+    }
+    printf("The message is: %s", buffer);
+    fprintf(stderr, "The mesaage contains %d bytes.\n", n);
+
+    close(sockfd);
+
+    return 0;
+}
\ No newline at end of file
diff --git a/a2/program b/a2/program
new file mode 100644
index 0000000..dcebd64
Binary files /dev/null and b/a2/program differ
diff --git a/a4/program b/a4/program
new file mode 100644
index 0000000..4457898
Binary files /dev/null and b/a4/program differ
diff --git a/a4/program.c b/a4/program.c
index c0915b9..33b4fc5 100644
--- a/a4/program.c
+++ b/a4/program.c
@@ -2,8 +2,8 @@
 #include<stdlib.h>
 #define LINESIZE 100
 struct heap {
-    int* array;
     int size;
+    int* line;
     int capacity;
 };
 
@@ -21,7 +21,7 @@ int pravy_syn(int i){
 
 struct heap* create_heap(int capacity){
     struct heap* h = calloc(1,sizeof(struct heap));
-    h->array = calloc(capacity,sizeof(int));
+    h->line = calloc(capacity,sizeof(int));
     h->capacity =capacity;
     h->size = 0;
     return h;
@@ -37,7 +37,7 @@ void check_heap_property(struct heap* h){
             break;
         }
 
-        if(h->array[i] > h->array[pravy] || h->array[i] > h->array[lavy]){
+        if(h->line[i] > h->line[pravy] || h->line[i] > h->line[lavy]){
             printf("%s\n","Niejekopa.");
             exit(0);
         }
@@ -46,15 +46,15 @@ void check_heap_property(struct heap* h){
 }
 
 void delete_heap(struct heap* h){
-    free(h->array);
+    free(h->line);
     free(h);
 }
 
-void swap(int arr[],int a, int b){
-    int temp = arr[a];
-    arr[a] = arr[b];
-    arr[b] = temp;
-}
+//void vymen(int arr[],int a, int b){
+//    int pom = arr[a];
+//    arr[a] = arr[b];
+//    arr[b] = pom;
+//}
 
 void add(struct heap* h,int value){
 
@@ -64,7 +64,7 @@ void add(struct heap* h,int value){
     }
 
     h->size += 1;
-    h->array[i] = value;
+    h->line[i] = value;
 
 
 }
@@ -79,7 +79,7 @@ void print(struct heap* h,int count_spaces,int index){
     for(int i =0;i<count_spaces;i++){
         printf(" ");
     }
-    printf("%d\n",h->array[index]);
+    printf("%d\n",h->line[index]);
     print(h,count_spaces+1,lavy_syn(index));
     print(h,count_spaces+1,pravy_syn(index));
 
@@ -91,24 +91,28 @@ void sort(struct heap *h){
     int i = h->size-1;
     int p = parent(i);
 
-    while(h->array[i] < h->array[p]) {
-        swap(h->array,i, p);
+    while(h->line[i] < h->line[p]) {
+        int arr[] = h->line;
+        int pom = arr[i];
+        arr[i] = arr[p];
+        arr[p] = pom;
+        //vymen(h->line,i, p);
         i = parent(i);
     }
 }
 
 int main(){
-    int i  =0;
-    int temp_array[LINESIZE] = {0};
+    int i  = 0;
+    int temp_line[LINESIZE] = {0};
 
-    while(scanf("%d",&temp_array[i]) == 1) {
+    while(scanf("%d",&temp_line[i])== 1)  {
         i++;
     }
 
     struct heap* h = create_heap(i);
 
     for(int j =0;j<i;j++){
-        add(h,temp_array[j]);
+        add(h,temp_line[j]);
     }
 
     check_heap_property(h);
diff --git a/cv8/program b/cv8/program
new file mode 100644
index 0000000..5b91a87
Binary files /dev/null and b/cv8/program differ
diff --git a/sk1a/Makefile b/sk1a/Makefile
new file mode 100644
index 0000000..ae923d1
--- /dev/null
+++ b/sk1a/Makefile
@@ -0,0 +1,14 @@
+all: program
+
+maze.o: maze.c
+	gcc -c -g -Wall maze.c -o maze.o
+
+main.o: main.c
+	gcc -c -g -Wall main.c -o main.o
+
+program: maze.o main.o
+	gcc -g -Wall maze.o main.o  -o program
+
+clean:
+	rm program
+	rm *.o
diff --git a/sk1a/main.c b/sk1a/main.c
new file mode 100644
index 0000000..091005a
--- /dev/null
+++ b/sk1a/main.c
@@ -0,0 +1,39 @@
+#define SZ 5
+#include <stdio.h>
+#include <string.h>
+#include "maze.h"
+
+void print_solution(char* matrix,int sz){
+    for (int i = 0; i < sz * sz; i++){
+        printf("%c ",matrix[i]);
+        if (i % sz == (sz-1)){
+            printf("\n");
+        }
+    }
+}
+
+int main(){
+    char tmaze[SZ+1][SZ+1]={
+        "*x   ",
+        "  x  ",
+        "  x  ",
+        "  x  ",
+        "     ",
+    };
+    char maze[SZ*SZ];
+    memset(maze,' ',SZ*SZ);
+    for (int i= 0; i < SZ; i++){
+        for (int j= 0; j < SZ; j++){
+            if (tmaze[i][j] == 'x'){
+                maze[i*SZ+j] = 'x';
+            }
+        }
+    }
+    int r = solve_maze(maze,SZ);
+    if (!r){
+        printf("Nenasiel som riesenie\n");
+    }
+    print_solution(maze,SZ);
+
+    return 0;
+}
diff --git a/sk1a/main.o b/sk1a/main.o
new file mode 100644
index 0000000..330aa67
Binary files /dev/null and b/sk1a/main.o differ
diff --git a/sk1a/maze.c b/sk1a/maze.c
new file mode 100644
index 0000000..5f09bc8
--- /dev/null
+++ b/sk1a/maze.c
@@ -0,0 +1,8 @@
+#include <stdio.h>
+#include <string.h>
+#include "maze.h"
+#include <assert.h>
+
+int solve_maze(char* maze,int size){
+    return 0;
+}
diff --git a/sk1a/maze.h b/sk1a/maze.h
new file mode 100644
index 0000000..2e34662
--- /dev/null
+++ b/sk1a/maze.h
@@ -0,0 +1,22 @@
+#ifndef _MAZEH
+#define _MAZEH
+
+/**
+ * Funkcia by mala zobrať vstupnú mriežku a 
+ * vyznačiť na nej cestu z ľavého horného rohu do pravého dolného rohu. 
+ * Mriežka je uložená do jednorozmerného poľa, pričom najprv ide prvý riadok,
+ * za ním druhý a tak ďalej. 
+ *
+ * Na mriežke sa nachádzajú znaky: 
+ * ' ' - voľné miesto
+ * 'x' - stena. Stena nesmie byť prepísaná.
+ * '*' - poloha potkana. Na začiatku je na 0,0.
+ *
+ * @param maze Štvorcová mriežka rozmeru size x size.
+ * @param size Rozmer mriežky
+ * @return 1 ak existuje riešenie, 0 inak.
+ */
+int solve_maze(char* maze,int size);
+
+
+#endif
diff --git a/sk1a/maze.o b/sk1a/maze.o
new file mode 100644
index 0000000..e73ecc2
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diff --git a/sk1a/program b/sk1a/program
new file mode 100644
index 0000000..6045c16
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