Heron and His Triangle

A triangle is a Heron’s triangle if it satisfies that the side lengths of it are consecutive integers t−1, t, t+ 1 and thatits area is an integer. Now, for given n you need to find a Heron’s triangle associated with the smallest t bigger
than or equal to n.

The input contains multiple test cases. The first line of a multiple input is an integer T (1 ≤ T ≤ 30000) followedby T lines. Each line contains an integer N (1 ≤ N ≤ 10^30).

For each test case, output the smallest t in a line. If the Heron’s triangle required does not exist, output -1.

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2017ACM/ICPC亚洲区沈阳站-重现赛（感谢东北大学）