print("math: {d1}, physics: {d2}");
3014251410http://paper.people.com.cn/rmrb/pc/content/202602/27/content_30142514.htmlhttp://paper.people.com.cn/rmrb/pad/content/202602/27/content_30142514.html11921 让创新药离患者更近（实干显担当 同心启新程·代表委员履职故事）
。业内人士推荐新收录的资料作为进阶阅读
When a problem is discovered in production, it should be obvious what the problem was, and the internal signals for developers should make it easy to diagnose and fix.
We wanted a scenario where, say, 5 well-placed border points could efficiently represent an area with 5,000 internal points and 10,000 road edges. This would reduce those 10,000 edges to just 5*4/2 = 10 shortcuts for routing through that cluster at a high level – an incredible 1:1000 point ratio and a 30x reduction in edges to consider for the high-level path!
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