摘要： Arithmetic ProgressionsAn arithmetic progression is a sequence of the form a, a+b, a+2b, ..., a+nb where n=0,1,2,3,... . For this problem, a is a non-... 阅读全文

摘要： Ski Course DesignFarmer John has N hills on his farm (1 #include #include using namespace std;int main(){ freopen("skidesign.in","r",stdin); fre... 阅读全文

摘要： WormholesFarmer John's hobby of conducting high-energy physics experiments on weekends has backfired, causing N wormholes (2 B . Bessie will tra... 阅读全文

摘要： Combination LockFarmer John's cows keep escaping from his farm and causing mischief. To try and prevent them from leaving, he purchases a fancy combin... 阅读全文

摘要： Prime CryptarithmThe following cryptarithm is a multiplication problem that can be solved by substituting digits from a specified set of N digits into... 阅读全文

摘要： Barn RepairIt was a dark and stormy night that ripped the roof and gates off the stalls that hold Farmer John's cows. Happily, many of the cows were o... 阅读全文

摘要： Mixing MilkThe Merry Milk Makers company buys milk from farmers, packages it into attractive 1- and 2-Unit bottles, and then sells that milk to grocer... 阅读全文

摘要： Dual PalindromesMario Cruz (Colombia) & Hugo Rickeboer (Argentina)A number that reads the same from right to left as when read from left to right is c... 阅读全文

摘要： Palindromic SquaresRob KolstadPalindromes are numbers that read the same forwards as backwards. The number 12321 is a typical palindrome.Given a numbe... 阅读全文

摘要： Name That NumberAmong the large Wisconsin cattle ranchers, it is customary to brand cows with serial numbers to please the Accounting Department. The ... 阅读全文