Mike added all positive integers from 1 to n on his calculator and obtained a total of 2015. By mistake, however, he had entered one number twice. Find the correct total $$a$$ that Mike should have obtained and the number $$b$$ that he added twice.

Write the answers separated by a period, $$(a.b)$$.

For example, if you think that $$a = 100, b= 35$$ is the solution, submit your answer as 100.35.

×