| Time Limit | $1$ 秒/Second(s) | Memory Limit | $512$ 兆字节/Megabyte(s) |
| 提交总数 | $0$ | 正确数量 | $0$ | "
| 裁判形式 | 标准裁判/Standard Judge | 我的状态 | 尚未尝试 |
| 难度 | 分类标签 | usaco |
An arithmetic progression is a sequence of the form a, a+b, a+2b, ..., a+nb where n=0,1,2,3,... . For this problem, a is a non-negative integer and b is a positive integer.
Write a program that finds all arithmetic progressions of length n in the set S of bisquares. The set of bisquares is defined as the set of all integers of the form p2 + q2 (where p and q are non-negative integers).
| Line 1: | N (3 <= N <= 25), the length of progressions for which to search |
| Line 2: | M (1 <= M <= 250), an upper bound to limit the search to the bisquares with 0 <= p,q <= M. |
If no sequence is found, a singe line reading `NONE'. Otherwise, output one or more lines, each with two integers: the first element in a found sequence and the difference between consecutive elements in the same sequence. The lines should be ordered with smallest-difference sequences first and smallest starting number within those sequences first.
There will be no more than 10,000 sequences.
5
7
1 4
37 4
2 8
29 8
1 12
5 12
13 12
17 12
5 20
2 24
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| 算法最快[$ $ms] | |||
| 内存最少[$ $KB] | |||
| 第一AC | |||
| 第一挑战 |
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