diff --git a/sapfor/experts/Sapfor_2017/_src/Transformations/set_implicit_none.cpp b/sapfor/experts/Sapfor_2017/_src/Transformations/set_implicit_none.cpp
index c7c6eb9..1aaa4c5 100644
--- a/sapfor/experts/Sapfor_2017/_src/Transformations/set_implicit_none.cpp
+++ b/sapfor/experts/Sapfor_2017/_src/Transformations/set_implicit_none.cpp
@@ -7,13 +7,13 @@ using std::set;
 
 static const char commonIntLetters[6] = {'i', 'j', 'k', 'm', 'n', 'l'};
 
-static void InitTypes(map<char, SgType*> types)
+static void InitTypes(map<char, SgType*>& types)
 {
 	for (char letter = 'a'; letter <= 'z'; letter++)
 		types[letter] = NULL;
 }
 
-static void FillCommonTypes(map<char, SgType*> types)
+static void FillCommonTypes(map<char, SgType*>& types)
 {
 	for (char letter : commonIntLetters)
 		if (types[letter] == NULL)
@@ -24,13 +24,13 @@ static void FillCommonTypes(map<char, SgType*> types)
 			types[letter.first] = new SgType(T_FLOAT);
 }
 
-static void FindAllVars(SgExpression* expr, set<SgSymbol*>* allVars)
+static void FindAllVars(SgExpression* expr, set<SgSymbol*>& allVars)
 {
 	if (expr == NULL)
 		return;
 
 	if (expr->variant() == VAR_REF || expr->variant() == ARRAY_REF)
-		allVars->insert(expr->symbol());
+		allVars.insert(expr->symbol());
 
 	FindAllVars(expr->lhs(), allVars);
 	FindAllVars(expr->rhs(), allVars);
@@ -114,7 +114,7 @@ static map<char, SgType*> FunctionImplicitCheck(SgStatement* function, map<SgSta
 		statement != NULL && statement->variant() != CONTAINS_STMT; statement = statement->lexNext())
 	{
 		for (int expressionNumber = 0; expressionNumber < 3; expressionNumber++)
-			FindAllVars(statement->expr(expressionNumber), &allVars);
+			FindAllVars(statement->expr(expressionNumber), allVars);
 
 		if (statement == function->lastExecutable())
 			break;
@@ -174,6 +174,4 @@ void ImplicitCheck(SgFile* file)
 	}
 
 	typesByFunctions.clear();
-
-	printf("%s", file->firstStatement()->unparse());
 }
\ No newline at end of file