Sooner and later payment puzzle
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Question is simple. There are two persons. First person has payment in last day of the month. Second person has payment in 10th day of next month. Usually when we think farsighted both of them have same balance after few months.

I have made some calculation which show that first person is in more comfortable situation.
Problem is very simple and arose in conversation with my colleague, when he assume that we are in same position even I get payment earlier.
