摘要： Description The French author Georges Perec (1936–1982) once wrote a book, La disparition, without the letter 'e'. He was a member of the Oulipo group 阅读全文

摘要： Problem Description This is a simple problem. Given two triangles A and B, you should determine they are intersect, contain or disjoint. (Public edge 阅读全文

摘要： Problem Description Therearex frogs and y chicken in a garden. Kim found there are n heads and m legs in the garden. Please tell Kim how many frogs an 阅读全文