2020-2021:teams:intrepidsword:2020.05.15-2020.05.21_周报
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2020-2021:teams:intrepidsword:2020.05.15-2020.05.21_周报 [2020/05/22 21:58] chielo 创建 |
2020-2021:teams:intrepidsword:2020.05.15-2020.05.21_周报 [2020/05/24 15:08] (当前版本) prime21 [pmxm] |
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| + | [[https://codeforces.com/contest/1355/|Codeforces Round #643 (Div. 2)]]: ''pro: 5/5/6'' ''rk: 711/8876'' | ||
| ==== pmxm ==== | ==== pmxm ==== | ||
| + | 没摸 | ||
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| + | topcoder srm 722 (vp: solved solved opened) | ||
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| ==== zzh ==== | ==== zzh ==== | ||
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| + | 科普一下解同余方程的基本思想吧。设 $f(\vec{x})\equiv a\pmod{m}$，而 $m=p_{1}^{e_{1}}\cdots p_{s}^{e_{s}}$，那么可以分别求解每个 $f(\vec{x})\equiv a\pmod{p_{i}^{e_{i}}}$，然后将所有解用中国剩余定理合并。值得注意的是，由于 $p_{i}^{e_{i}}$ 两两互质，因此原方程的解集与分解后各方程的解集的笛卡尔积一一对应。 | ||
| ==== pmxm ==== | ==== pmxm ==== | ||
| + | 推荐 | ||
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| + | 1. 基本状压dp: TopCoder SRM 722 div1 600 | ||
| + | 2. dp多写几道题 | ||
| ==== jsh ==== | ==== jsh ==== | ||
2020-2021/teams/intrepidsword/2020.05.15-2020.05.21_周报.1590155890.txt.gz · 最后更改: 2020/05/22 21:58 由 chielo
