diff --git a/du1/program.c b/du1/program.c
index 220321b..9c701a9 100644
--- a/du1/program.c
+++ b/du1/program.c
@@ -1,20 +1,45 @@
 #include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+int is_valid_number(const char *s) {
+	char *endptr;
+	if (s[0] == '\0' || s[0] == '\n') return 1;
+	strtod(s, &endptr);
+	while (*endptr == ' ' || *endptr == '\t' || *endptr == '\n') endptr++;
+	return *endptr == '\0';
+}
 
 int main(){
-double x = 0, a = 0, b = 0, c = 0, y;
-if (scanf("%lf", &x) != 1 && x != 0){
-    printf("Nepodarilo sa načítať x");
-    return 0;
-} else if (scanf("%lf", &a) != 1 && a != 0){
-    printf("Nepodarilo sa načítať a");
-    return 0;
-} else if(scanf("%lf", &b) != 1 && b != 0){
-    printf("Nepodarilo sa načítať b");
-    return 0;
-} else if(scanf("%lf", &c) != 1 && c != 0){
-    printf("Nepodarilo sa načítať c");
-    return 0;
-}
+    char line[100];
+    double x = 0, a = 0, b = 0, c = 0, y;
+
+    fgets(line, 100, stdin);
+    if(!is_valid_number(line)){
+        return 0;
+    }
+    x = strtod(line, NULL);
+
+    fgets(line, 100, stdin);
+    if(!is_valid_number(line)){
+        return 0;
+    }
+    a = strtod(line, NULL);
+
+    fgets(line, 100, stdin);
+    if(!is_valid_number(line)){
+        printf("Nepodarilo sa načítať b");
+        return 0;
+    }
+    b = strtod(line, NULL);
+
+    fgets(line, 100, stdin);
+    if(!is_valid_number(line)){
+        printf("Nepodarilo sa načítať c");
+        return 0;
+    }
+    c = strtod(line, NULL);
+
 y = x*x*a+b*x+c;
 printf("Vysledok je: %.2f\n", y);
     return 0;