diff --git a/du4/program.c b/du4/program.c
index 655ee97..cdffea0 100644
--- a/du4/program.c
+++ b/du4/program.c
@@ -1,55 +1,56 @@
 #include <stdio.h>
 #include <stdbool.h>
-
-int main(){
-	int c[2];
-	int a = 0;
-	int vysledok;
-	char riadok[999];
-	char *endptr = NULL;
+int main ()
+{
+	int c, vysledok, i = 0;
+	int b[99];
 	bool first = true;
 	bool second = false;
 	while(1){
-		char* r = fgets(riadok,999,stdin);
-		if(*r == '\n'){
-			break;
-		}else if(*r == ' ')
-			continue;
-		else if(*r == '+'){
-			first = true;
-			second = true;;
-			continue;
-		}else if(*r == '-'){
-			first = false;
-			second = false;
-			continue;
-		}else if(*r == '/'){
-			first = true;
-			second = false;
-			continue;
-		}else if(*r == '*'){
-			first = false;
-			second = true;
-			continue;
+		c = getchar();
+		if(c <= 255 && c >= 0){
+			if(c == '\n'){
+				break;
+			}else if(c == ' '){
+				continue;
+			}else if(c == '='){
+				continue;
+			}else if(c == '+'){
+				first = true;
+				second = true;
+				continue;
+			}else if(c == '-'){
+				first = false;
+				second = false;
+				continue;
+			}else if(c == '/'){
+				first = true;
+				second = false;
+				continue;
+			}else if(c == '*'){
+				first = false;
+				second = true;
+				continue;
+			}
 		}else{
-			int v = strtod(riadok,&endptr);
-			c[a] = v;
-			printf("%d, %d\n", v, c[a];
-			a++;
-			continue;
+			if(i == 2)
+				break;
+			c = 0;
+			int r = scanf("%d",&c);
+			b[i++] = c;
 		}
 	}
 	if(first == true && second == true)
-		vysledok = c[0] + c[1];
+		vysledok = b[0] + b[1];
 	else if(first == false && second == false)
-		vysledok = c[0] - c[1];
+		vysledok = b[0] - b[1];
 	else if(first == true && second == false)
-		vysledok = c[0] / c[1];
+		vysledok = b[0] / b[1];
 	else if(first == false && second == true)
-		vysledok = c[0] * c[1];
-	if(vysledok == c[2])
+		vysledok = b[0] * b[1];
+	if(vysledok == b[2])
 		printf("OK\n");
 	else
 		printf("ZLE\n");
 	return 0;
-}
+}
\ No newline at end of file