天行健，君子以自强不息

Sumsets Time Limit: 2000MS   Memory Limit: 200000K Total Submissions: 17159   Accepted: 6760 Description Farmer John commanded his cows to search for different sets of nu

Investment Time Limit: 1000MS   Memory Limit: 30000K Total Submissions: 10434   Accepted: 3668 Description John never knew he had a grand-uncle, until he received the not

Dollar Dayz Time Limit: 1000MS Memory Limit: 65536K Total Submissions: 6735 Accepted: 2523 DescriptionFarmer John goes to Dollar Days at The Cow Store and discovers an unlimited number of t

分析一：把其中一个属性值看做value,另一个看做weight,便成了01背包的变形 设dp[j]为前i个cow放入容量为j的背包中所获取的最大weight,可以找到递推公式 dp[j] = max(dp[j]+dp[j-value[i]]+weight[i]); 分析二：在分析一的基础上，可以看成是求填满容量分别为0,1,.....的01背包所获得最大价值中的最大值

Piggy-Bank Time Limit: 1000MS Memory Limit: 10000K Total Submissions: 11329 Accepted: 5495 DescriptionBefore ACM can do anything, a budget must be prepared and the necessary financial su

Balance Time Limit: 1000MS   Memory Limit: 30000K Total Submissions: 14035   Accepted: 8825 Description Gigel has a strange "balance" and he wants to poise it. Actually,

Charm Bracelet Time Limit: 1000MS   Memory Limit: 65536K Total Submissions: 34882   Accepted: 15440 Description Bessie has gone to the mall's jewelry store and spies a ch

Milking Time Time Limit: 1000MS   Memory Limit: 65536K Total Submissions: 8267   Accepted: 3454 Description Bessie is such a hard-working cow. In fact, she is so focused

Cheapest Palindrome Time Limit: 2000MS   Memory Limit: 65536K Total Submissions: 8864   Accepted: 4299 Description Keeping track of all the cows can be a tricky task so F

Apple Catching Time Limit: 1000MS   Memory Limit: 65536K Total Submissions: 11435   Accepted: 5514 Description It is a little known fact that cows love apples. Farmer Joh

Face The Right Way Time Limit: 2000MS   Memory Limit: 65536K Total Submissions: 5709   Accepted: 2641 Description Farmer John has arranged his N (1 ≤ N ≤ 5,000) cows in a