摘要：
Dasha decided to have a rest after solving the problem. She had been ready to start her favourite activity — origami, but remembered the puzzle that s 阅读全文
摘要：
Description 有一张N×m的数表，其第i行第j列（1 < =i < =礼，1 < =j < =m）的数值为 能同时整除i和j的所有自然数之和。给定a，计算数表中不大于a的数之和。 有一张N×m的数表，其第i行第j列（1 < =i < =礼，1 < =j < =m）的数值为 能同时整除i和j 阅读全文