diff --git a/du4/program.c b/du4/program.c
index 865d4a4..8b4609e 100644
--- a/du4/program.c
+++ b/du4/program.c
@@ -63,7 +63,7 @@ int main()
   	    str[i][j]=b;
   	    j++;
   	}
-  	for(int k=0;k<i;k++){
+  	for(int k=0;k<=i-1;k++){
     	char *new_str = compactString(str[k],strlen(str[k]));
     	double first =-5,second =-5,res=-5;
     	char c='E';