diff --git a/du6/program.c b/du6/program.c
new file mode 100644
index 0000000..e11f303
--- /dev/null
+++ b/du6/program.c
@@ -0,0 +1,135 @@
+#include<stdio.h>
+#include<stdlib.h>
+#include<stdbool.h>
+#include<string.h>
+#include<errno.h>
+#include<inttypes.h>
+
+intmax_t readMaxCount(char *buffer, int size);
+bool readSttudent(char *buffer, int size);
+int findIndex(char *array[], char *match, int count);
+void swap(char **s1, char **s2);
+void sort(char *array[], int size);
+
+int main() {
+    char buffer[512];
+    char *sttudenti[1000];
+    int count = 0;
+    intmax_t maxCount = 0;
+
+    maxCount = readMaxCount(buffer, sizeof(buffer));
+
+    if (maxCount < 0) {
+        puts("Nespravny vstup");
+
+        return 0;
+    }
+
+    while (readSttudent(buffer, sizeof(buffer)) == true) {
+        char *sttudent;
+        int bl = strlen(buffer);
+        int l = (buffer[bl - 1] == '\n') ? (bl - 1) : bl;
+
+        if (l <= 0) {
+            continue;
+        }
+
+        sttudent = (char*) malloc(l + 1);
+        memcpy(sttudent, buffer, l);
+        sttudent[l] = '\0';
+
+        int index = findIndex(sttudenti, sttudent, count);
+
+        if (index > -1) {
+            free(sttudent);
+
+            continue;
+        }
+
+        sttudenti[count] = sttudent;
+        count++;
+    }
+
+    if (count == 0) {
+        puts("Ziadne prihlasky");
+
+        return 0;
+    }
+
+    sort(sttudenti, count);
+    puts("Prijati studenti:");
+    
+    for (int i = 0; i < (maxCount > count ? count : maxCount); i++) {
+        puts(sttudenti[i]);
+    }
+
+    if (maxCount < count) {
+        puts("Neprijati studenti:");
+
+        for (int i = maxCount; i < count; i++) {
+            puts(sttudenti[i]);
+        }
+    }
+
+    for (int i = 0; i < count; i++) {
+        free(sttudenti[i]);
+    }
+
+    return 0;
+}
+
+intmax_t readMaxCount(char *buffer, int size) {
+    char *retValPtr = fgets(buffer, size, stdin);
+    int l = strlen(buffer);
+
+    if (retValPtr == 0 || ferror(stdin) != 0 || l == 0 || (l == 1 && buffer[0] == '\n')) {
+        return -1;
+    }
+
+    char *endPtr;
+    intmax_t result = strtoimax(buffer, &endPtr, 10);
+
+    if (errno == ERANGE || endPtr != buffer + (l - 1)) {
+        return -1;
+    }
+
+    return result;
+}
+
+bool readSttudent(char *buffer, int size) {
+    char *retValPtr = fgets(buffer, size, stdin);
+    int l = strlen(buffer);
+
+    if (retValPtr == 0 || ferror(stdin) != 0 || l == 0 || (l == 1 && buffer[0] == '\n')) {
+        return false;
+    }
+
+    return true;
+}
+
+int findIndex(char *array[], char *match, int count) {
+    for (int i = 0; i < count; i++) {
+        if (strcmp(array[i], match) == 0) {
+            return i;
+        }
+    }
+
+    return -1;
+}
+
+void swap(char **s1, char **s2) {
+    char *tmp = *s1;
+
+    *s1 = *s2;
+    *s2 = tmp;
+}
+
+void sort(char *array[], int size) {
+    for (int i = 0; i < size - 1; i++) {
+        for (int j = 0; j < size - i - 1; j++) {
+            if (strcmp(array[j], array[j + 1]) > 0) {
+                swap(&array[j], &array[j + 1]);
+            }
+        }
+    }
+}