688脑筋急转弯困难derivationlong
Shifted-Congruence Block 3
题目
Given 15 integers y_1, ..., y_15, show that some nonempty consecutive block has sum congruent to twice its length modulo 13.
解题计时
0:00
提交作答时记录，用于后续平均用时统计。
题目
Given 15 integers y_1, ..., y_15, show that some nonempty consecutive block has sum congruent to twice its length modulo 13.
解题计时
0:00
提交作答时记录，用于后续平均用时统计。