diff --git a/du3/program.c b/du3/program.c
index 2168d46..6531677 100644
--- a/du3/program.c
+++ b/du3/program.c
@@ -10,11 +10,11 @@ int main() {
 	fgets(input, 11, stdin);
 
 	for(int i = 0; i < 11; i++){
-		if(!isdigit(input[i]) && input[i] != '.' && input[i] != '\n'){
+		if(!isdigit(input[i]) && input[i] != '.' && input[i] != '\0' && input[i] != '\n'){
 			break;	
 		}
 
-		if(input[i] != '.' && input[i] != '\n'){
+		if(input[i] != '.' && input[i] != '\n' && input[i] != '\0'){
 			numbers[counter1++] = input[i];
 		}
 		else {