题库 - https://new.bzoj.org:88

	ID	题目显示标签隐藏标签	AC / 尝试	难度
	4974	P5974 [Usaco2021 Dec]Paired Up P	1 / 2	10
	4975	P5975 [USACO21DEC] HILO P	1 / 1	10
	4976	P5976 [USACO21DEC] Paired Up G	1 / 1	10
	4977	P5977 [USACO21DEC] HILO G	1 / 1	10
	4978	P5978 [USACO21DEC] Bracelet Crossings G	1 / 1	10
	4979	P5979 [Usaco2021 Dec]Closest Cow Wins S	1 / 1	10
	4980	P5980 [USACO21DEC] Connecting Two Barns S	1 / 1	10
	4981	P5981 [USACO21DEC] Convoluted Intervals S 算法基础差分	1 / 1	10
	4982	P5982 [Usaco2021 Open]United Cows of Farmer John P	1 / 1	10
	4983	P5983 [USACO2021 OPEN] Routing Schemes P 数学矩阵树定理 best定理	1 / 1	10
	4984	P5984 [USACO2021OPEN] Balanced Subsets P	1 / 1	10
	4985	P5985 [Usaco2021 Open]United Cows of Farmer John G	1 / 1	10
	4986	P5986 [USACO2021 OPEN] Portals G 图论最小生成树	1 / 1	10
	4987	P5987 [USACO2021 OPEN] Permutation G	1 / 1	10
	4988	P5988 [Usaco2021 Open]Maze Tac Toe S	1 / 1	10
	4989	P5989 [USACO2021 OPEN] Do You Know Your ABCs? S	1 / 1	10
	4990	P5990 [USACO2021 OPEN] Acowdemia S	1 / 1	10
	4991	P5991 [USACO2021 FEB] No Time to Dry P	1 / 1	10
	4992	P5992 [USACO2021 FEB] Minimizing Edges P	1 / 1	10
	4993	P5993 [USACO2021 FEB] Counting Graphs P	1 / 1	10
	4994	P5994 [USACO2021 FEB] Stone Game G	1 / 1	10
	4995	P5995 [USACO21 FEB] Modern Art 3 G	2 / 2	10
	4996	P5996 [USACO2021 FEB] Count the Cows G	1 / 1	10
	4997	P5997 [USACO2021 FEB] Comfortable Cows S	1 / 1	10
	4998	P5998 [USACO2021 FEB] Year of the Cow S	1 / 1	10
	4999	P5999 [USACO2021 FEB] Just Green Enough S	1 / 2	10
	5000	P6000 [Usaco2021 Jan]Sum of Distances P	1 / 1	10
	5001	P6001 [Usaco2021 Jan]Minimum Cost Paths P	1 / 1	10
	5002	P6002 [Usaco2021 Jan]Paint by Letters P	1 / 3	10
	5003	P6003 [Usaco2021 jan] Uddered but not Herd G	1 / 1	10

根据当前过滤条件随机选择一道题