Contest Corner Solutions: CC321–CC330

摘要

Six boxes are numbered 1; 2; 3; 4; 5 and 6. Suppose that there are Nballs distributed among these six boxes. Find the least N for which it is guaranteedthat for at least one k, box number k contains at least k2 balls.Originally Problem 4 from the 2015 Purple Comet! Math Meet.