Well the president in a parliamentary system of government holds more power than the prime minister really but the first thing I'll do is to create an equality between the president and the prime minister so that there will be check and balance between two two rulership entities, thereby reducing any chance of abuse of power from the president.

The second thing I'll do is to focus on the constitution since I'll be staying only one day and the changes I'll make will last a long time, I'll make laws to apprehend corruption laws like death penalty for capital offences such as rape and murder and public embezzlement so that corrupt judges will never have a chance to vindicate criminals.

I'll make public grants so that brilliant students can go to school without fear of money and of course I'll entrench this in the constitution.

Lastly I'll make the system of government to be constitutional democracy so that every action of every leader must be according to the constitution, this way crime and corruption will reduce