diff --git a/du4/program.c b/du4/program.c
index 1b27d7d..152c4c7 100644
--- a/du4/program.c
+++ b/du4/program.c
@@ -47,6 +47,14 @@ double compare_percent(double a, double b, double eps)
   return diff < 0 ? -1 : diff > 0 ? +1 : 0;
 }
 
+int check(char *str){
+    for(int i =0;i<strlen(str);i++){
+        if(str[i]=='='&&str[i+1]=='='){
+            return 0;
+        }
+    }
+    return 1;
+}
 
 
 int main()
@@ -59,12 +67,10 @@ int main()
     	char *new_str = compactString(str[i],strlen(str[i]));
     	double first =-5,second =-5,res=-5;
     	char c='E';
-      	char ravno[3];
-      	ravno[1]='\n';
-    	sscanf(new_str,"%lf%c%lf%s%lf",&first,&c,&second,ravno,&res);
+    	sscanf(new_str,"%lf%c%lf%*[=]%lf",&first,&c,&second,&res);
     
     
-    	if(c=='E'||first==-5||second==-5||res==-5||(c!=43&&c!=42&&c!=45&&c!=47)||(ravno[1]!='\n'||ravno[0]!='=')){
+    	if(c!=43&&c!=42&&c!=45&&c!=47||check(new_str)==0){
     	    printf("CHYBA\n");
           	continue;
     	}