diff --git a/main/main.cpp b/main/main.cpp
index fcf1da7..a6bf8e7 100644
--- a/main/main.cpp
+++ b/main/main.cpp
@@ -54,18 +54,22 @@ int main() {
     cout << endl;
 
     if (isParsed) {
-        QDateTime start = QDateTime::currentDateTime();
-        start.setTime(QTime(start.time().hour(), start.time().minute(), 0));
-        Calculator calculator(start);
-        QList<int> timeSteps = calculator.GetTimeSteps(&cfg);
+        int minParkingTime = get_minimal_parkingtime(&cfg);
+        QList<int> timeSteps = Calculator::GetInstance().GetTimeSteps(&cfg);
         qCritical() << timeSteps;
+        int Down = 0;
+        int Up = 1;
+        //compute_next_timestep(&cfg, )
 
         for (int i=0; i<timeSteps.size(); ++i) {
-            uint32_t price = calculator.GetPriceForTimeStep(&cfg, timeSteps.at(i));
-            uint32_t duration = calculator.GetDurationForPrice(&cfg, price);
-            qCritical() << "nextTimeStep relative to start:"
-                        << duration << start.addSecs(duration * 60)
-                        << "(price so far:" << price << ")";
+            int nextTimeStep = compute_next_timestep(&cfg, timeSteps.at(i), Up);
+            qCritical() << "nextTimeStep" << nextTimeStep;
+
+//            uint32_t price = calculator.GetPriceForTimeStep(&cfg, timeSteps.at(i));
+//            uint32_t duration = calculator.GetDurationForPrice(&cfg, price);
+//            qCritical() << "nextTimeStep relative to start:"
+//                        << duration << start.addSecs(duration * 60)
+//                        << "(price so far:" << price << ")";
         }
     }
 #endif