容斥原理 (共8题)
ID Problem Title Source AC Ratio Solved Tries
2450 PAROVI 双打(翻译:陈天祺) COCi 2015-2016 6th 100% 1 1
3995 Devu and Flowers Codeforces 451E 33% 6 18
4010 Sky Code SEERC 2008 100% 2 2
4096 开关(switch) ZJOI2019 100% 1 1
4626 小星星(star) ZJOI2016 100% 2 2
4639 树(tree) ZJOI2018 50% 2 4
4665 随机立方体(cube) CTS2019, CTSC2019 100% 1 1
4670 氪金手游(fgo) CTS2019,CTSC2019 100% 1 1