diff --git a/du3/program.c b/du3/program.c
new file mode 100644
index 0000000..6f839b3
--- /dev/null
+++ b/du3/program.c
@@ -0,0 +1,23 @@
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <assert.h>
+#define LINE_SIZE 10
+int main(){
+char riadok[LINE_SIZE];
+memset(riadok, 0,LINE_SIZE);
+char* r = fgets(riadok,LINE_SIZE,stdin);
+assert(r!=NULL);
+int r2 = atol(riadok);
+int stop = 0;
+if (r2 == 0){
+    printf("Konverzia sa nepodarila alebo v reťazci sa nachádza nula.");
+stop++;
+}
+if(stop == 0){
+printf("%d", r2);
+
+}
+
+
+}