Problem Set - HFOJ

	ID	Problem Show tags Hide tags	AC / Tried	Difficulty
	1856	P2804 神秘数字搜索数学线性数据结构二分递归	0 / 0	4
	1858	P2805 [NOI2009] 植物大战僵尸 2009 NOI 网络流图论建模拓扑排序最小割	0 / 0	6
	1854	P2807 三角形计数递推	0 / 2	2
	1859	P2808 小笼包动态规划,dp 2014	0 / 0	5
	1860	P2809 hzwer 爱折纸搜索 2016 福建省历届夏令营高级数据结构福建	0 / 0	5
	1868	P2810 Catch the theives 二分	0 / 0	4
	1869	P2811 Protect the school 图论	0 / 0	5
	1870	P2812 校园网络【[USACO] Network of Schools加强版】图论强连通分量,缩点	0 / 0	5
	1871	P2813 母舰模拟贪心广东排序	0 / 0	2
	1872	P2814 家谱字符串搜索图论线性数据结构并查集	1 / 1	3
	1875	P2815 IPv6地址压缩模拟字符串	0 / 0	4
	2436	P2816 宋荣子搭积木 2016 山东	0 / 0	4
	2437	P2817 宋荣子的城堡 2016 山东	0 / 0	3
	1874	P2818 天使的起誓高精度中国剩余定理,CRT	0 / 0	2
	1876	P2819 图的 m 着色问题模拟搜索递归	0 / 0	2
	1877	P2820 局域网图论并查集生成树	2 / 2	3
	1878	P2821 变幻数贪心	0 / 0	5
	1881	P2822 [NOIP2016 提高组] 组合数问题数学 2016 NOIp 提高组组合数学	2 / 3	3
	1861	P2823 时间表 2016 福建省历届夏令营网络流福建	0 / 0	6
	1884	P2824 [HEOI2016/TJOI2016] 排序 2016 线段树二分各省省选河北排序	1 / 3	6
	1885	P2825 [HEOI2016/TJOI2016] 游戏 2016 各省省选网络流河北连通块二分图天津	0 / 0	6
	1888	P2827 [NOIP2016 提高组] 蚯蚓 2016 堆 NOIp 提高组 O2优化队列	1 / 1	5
	1862	P2829 大逃离图论	0 / 0	6
	1863	P2830 写程序模拟	0 / 0	4
	1873	P2831 [NOIP2016 提高组] 愤怒的小鸟搜索 2016 NOIp 提高组状态压缩	0 / 0	5
	1890	P2832 行路难【疑似 std 复杂度有误】图论	0 / 0	5
	1895	P2833 等式数学洛谷原创	0 / 0	4
	8337	P2834 纸币问题 3	0 / 0	2
	1889	P2835 刻录光盘图论并查集强连通分量,缩点	4 / 15	4
	1882	P2836 加油问题动态规划,dp	0 / 0	5
	1879	P2837 [USACO08FEB] Dining Cows B 动态规划,dp 递推 2008 USACO	0 / 0	2
	1886	P2838 瓶子国的故事洛谷原创提交答案 Special Judge	0 / 0	7
	1887	P2839 [国家集训队] middle 二分 WC/CTSC/集训队可持久化线段树	2 / 2	6
	8336	P2840 纸币问题 2	0 / 0	2
	1893	P2841 A*B Problem 数学高精度递推进制	0 / 0	5
	8335	P2842 纸币问题 1	0 / 0	2
	1892	P2843 暗杀前缀和	0 / 0	5
	1796	P2845 [USACO15DEC] Switching on the Lights S 模拟搜索 2015 USACO 广度优先搜索,BFS	0 / 0	4
	1883	P2846 [USACO08NOV] Light Switching G 2008 线段树 USACO	1 / 1	4
	1894	P2847 [USACO16DEC] Moocast G 2016 USACO	0 / 0	4
	1896	P2848 [USACO16DEC] Cow Checklist G 2016 USACO	0 / 0	5
	1891	P2849 [USACO14DEC] Marathon S 2014 USACO	0 / 0	3
	1897	P2850 [USACO06DEC] Wormholes G 2006 USACO 深度优先搜索,DFS 负权环	1 / 1	4
	1898	P2851 [USACO06DEC] The Fewest Coins G 动态规划,dp 2006 USACO 背包进制	1 / 1	5
	1899	P2852 [USACO06DEC] Milk Patterns G 2006 二分 USACO 哈希,HASH 后缀数组,SA	0 / 0	4
	1900	P2853 [USACO06DEC] Cow Picnic S 搜索贪心 2006 USACO 深度优先搜索,DFS	1 / 1	3
	1901	P2854 [USACO06DEC] Cow Roller Coaster S 动态规划,dp 2006 USACO 背包	0 / 0	4
	1902	P2855 [USACO06DEC] River Hopscotch S 2006 二分 USACO	0 / 0	3
	1903	P2856 [USACO06FEB] Cellphones G 贪心 2006 线段树 USACO 前缀和	0 / 0	4
	1904	P2857 [USACO06FEB] Steady Cow Assignment G 贪心 2006 二分 USACO 枚举最大流双指针,two-pointer	0 / 0	6
	1905	P2858 [USACO06FEB] Treats for the Cows G/S 动态规划,dp 2006 USACO 区间 dp	3 / 3	3
	1906	P2859 [USACO06FEB] Stall Reservations S 贪心 2006 线段树 USACO Special Judge 前缀和	0 / 0	5
	1907	P2860 [USACO06JAN] Redundant Paths G 图论 2006 USACO 强连通分量,缩点位运算	0 / 0	5
	1908	P2861 [USACO06JAN] Roping the Field G 2006 USACO	0 / 0	5
	1909	P2862 [USACO06JAN] Corral the Cows G 2006 线段树二分 USACO	0 / 0	5
	1910	P2863 [USACO06JAN] The Cow Prom S 2006 USACO 强连通分量,缩点 Tarjan	5 / 5	4
	1911	P2864 [USACO06JAN] The Grove S 2006 USACO 广度优先搜索,BFS	0 / 0	5
	1912	P2865 [USACO06NOV] Roadblocks G 2006 USACO 最短路	2 / 2	5
	1913	P2866 [USACO06NOV] Bad Hair Day S 模拟 2006 USACO 栈	6 / 15	3
	1914	P2867 [USACO06NOV] Big Square S 动态规划,dp 2006 USACO 枚举深度优先搜索,DFS	0 / 0	4
	1915	P2868 [USACO07DEC] Sightseeing Cows G 搜索 2007 二分 USACO 最短路分数规划	0 / 0	6
	1916	P2869 [USACO07DEC] Gourmet Grazers G 2007 USACO	0 / 0	5
	1917	P2870 [USACO07DEC] Best Cow Line G 字符串贪心 2007 USACO 队列	1 / 1	5
	1918	P2871 [USACO07DEC] Charm Bracelet S 动态规划,dp 2007 USACO 枚举背包	1 / 1	2
	1919	P2872 [USACO07DEC] Building Roads S 图论 2007 USACO 生成树	0 / 0	3
	1920	P2873 [USACO07DEC] Mud Puddles S 2007 USACO	0 / 0	2
	1921	P2874 [USACO07FEB] Building A New Barn G 数学贪心 2007 USACO	0 / 0	5
	1922	P2875 [USACO07FEB] The Cow Lexicon S 字符串动态规划,dp 2007 USACO	0 / 0	5
	1923	P2876 [USACO07JAN] Problem Solving G 动态规划,dp 贪心 2007 USACO 最短路	0 / 0	5
	1924	P2877 [USACO07JAN] Cow School G 贪心 2007 USACO	0 / 0	6
	1925	P2878 [USACO07JAN] Protecting the Flowers S 模拟贪心 2007 USACO 排序	0 / 0	3
	1926	P2879 [USACO07JAN] Tallest Cow S 模拟 2007 USACO 哈希,HASH 前缀和	0 / 0	4
	1927	P2880 [USACO07JAN] Balanced Lineup G 2007 USACO 树状数组 RMQ st表	4 / 4	3
	1928	P2881 [USACO07MAR] Ranking the Cows G 2007 USACO	0 / 0	4
	1929	P2882 [USACO07MAR] Face The Right Way G 贪心 2007 USACO 枚举	0 / 0	5
	1930	P2883 [USACO07MAR] Cow Traffic S 动态规划,dp 递推 2007 USACO 深度优先搜索,DFS	0 / 0	5
	1931	P2884 [USACO07MAR] Monthly Expense S 2007 USACO	0 / 0	3
	1932	P2885 [USACO07NOV] Telephone Wire G 动态规划,dp 2007 USACO 最短路	0 / 0	5
	1933	P2886 [USACO07NOV] Cow Relays G 动态规划,dp 2007 USACO 最短路矩阵乘法	0 / 0	5
	1934	P2887 [USACO07NOV] Sunscreen G 动态规划,dp 贪心 2007 USACO	0 / 0	3
	1935	P2888 [USACO07NOV] Cow Hurdles S 2007 USACO 最短路	0 / 0	3
	1936	P2889 [USACO07NOV] Milking Time S 动态规划,dp 2007 USACO 排序背包	0 / 0	3
	1937	P2890 [USACO07OPEN] Cheapest Palindrome G 字符串动态规划,dp 递推 2007 USACO	0 / 0	5
	1938	P2891 [USACO07OPEN] Dining G 动态规划,dp 递推 2007 USACO 最大流	0 / 0	6
	3003	P2892 [NOI2007] 追捕盗贼 2007 NOI 提交答案 Special Judge O2优化	0 / 0	7
	1940	P2893 [USACO08FEB] Making the Grade G 动态规划,dp 递推 2008 USACO O2优化	1 / 1	5
	1941	P2894 [USACO08FEB] Hotel G 2008 线段树 USACO 栈	0 / 0	5
	1942	P2895 [USACO08FEB] Meteor Shower S 搜索 2008 USACO 广度优先搜索,BFS	4 / 44	3
	1943	P2896 [USACO08FEB] Eating Together S 动态规划,dp 递推 2008 USACO 队列	0 / 0	3
	1944	P2897 [USACO08JAN] Artificial Lake G 2008 USACO 栈	0 / 0	5
	1945	P2898 [USACO08JAN] Haybale Guessing G 2008 线段树二分 USACO 并查集	0 / 0	5
	1946	P2899 [USACO08JAN] Cell Phone Network G 2008 USACO 排序树形 dp 拓扑排序	0 / 0	3
	1947	P2900 [USACO08MAR] Land Acquisition G 动态规划,dp 2008 USACO 斜率优化	0 / 0	6
	1948	P2901 [USACO08MAR] Cow Jogging G 2008 USACO 广度优先搜索,BFS K 短路 A*算法	0 / 0	5
	1949	P2902 [USACO08MAR] Pearl Pairing G 贪心 2008 USACO Special Judge	0 / 0	3
	1950	P2903 [USACO08MAR] The Loathesome Hay Baler S 模拟搜索 2008 USACO 广度优先搜索,BFS	0 / 0	3
	1951	P2904 [USACO08MAR] River Crossing S 动态规划,dp 2008 USACO 背包	0 / 0	3
	1952	P2905 [USACO08OPEN] Crisis on the Farm G 字符串动态规划,dp 搜索 2008 USACO	0 / 0	5
	1953	P2906 [USACO08OPEN] Cow Neighborhoods G 2008 USACO 并查集平衡树生成树	0 / 0	6
	1954	P2907 [USACO08OPEN] Roads Around The Farm S 2008 USACO	0 / 0	1

Pick a problem randomly based on the current filter.