diff --git a/du6/program.c b/du6/program.c
new file mode 100644
index 0000000..1854a69
--- /dev/null
+++ b/du6/program.c
@@ -0,0 +1,88 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#define SIZE 100
+
+int get_index(char* students[],int size, const char* name){
+	for(int i=0; i<size; i++){
+		if(!strcmp(students[i], name)){
+			return i;
+		}
+	}
+    return -1;
+}
+
+int compare_func(const void * a, const void * b){
+	return (strcmp(*(char**)a, *(char**)b));
+}
+
+int main(int argc, char const *argv[])
+{
+	char line[SIZE];
+	memset(line,0,SIZE);
+	char* r = fgets(line,SIZE,stdin);
+	if(r==NULL){
+		puts("Nespravny vstup");
+		return 0;
+	}
+	char* pEnd= NULL;
+	int size = strtol(line, &pEnd, 10);
+	if(size<=0){ //TODO check for trailing chars //there is newline
+		puts("Nespravny vstup");
+		return 0;
+	}
+
+	char* students[SIZE];
+	for(int i=0; i<SIZE; i++)
+	{
+		students[i] = calloc(SIZE, sizeof(char));
+	}
+	//memset(students,0,SIZE*sizeof(char*));
+
+	int loaded = 0;
+	while(1){
+		memset(line,0,SIZE);
+		char* r = fgets(line,SIZE,stdin);
+		if (r == NULL){
+			break;
+		}
+		if(line[0]=='\n'){
+			break;
+		}
+		char tmp[SIZE];
+		memset(tmp, 0, SIZE);
+		memcpy(tmp, line, strlen(line)-1);
+		int idx = get_index(students, loaded, tmp);
+		if(idx==-1){
+			memcpy(students[loaded], tmp, strlen(tmp));
+			loaded++;
+		}
+	}
+
+	if(loaded==0){
+		puts("Ziadne prihlasky");
+		for(int i=0; i<SIZE; i++){
+			free(students[i]);
+		}
+		return 0;
+	}
+
+
+	qsort(students, loaded, sizeof(char*), compare_func);
+
+	puts("Prijati studenti:");
+	for(int i=0; i<size; i++)
+		puts(students[i]);
+
+	if(size!=loaded){
+		puts("Neprijati studenti:");
+		for(int i=size; i<loaded; i++)
+			puts(students[i]);
+	}
+
+	for(int i=0; i<SIZE; i++){
+		free(students[i]);
+	}
+	return 0;
+}