摘要：
S=a*h/2 (底*高/2)S=a*b*sinC/2 (两边和夹角)S=sqrt(p*(p-a)*(p-b)*(p-c)) p=(a+b+c)/2 (已知3边长)S=a*b*c/(4r) (已知3边长和外接圆半径r)S=|cross(A,B,C)|/2 (叉积的一半) 阅读全文
摘要：
K-th NumberTime Limit:20000MSMemory Limit:65536KTotal Submissions:34048Accepted:10810Case Time Limit:2000MSDescriptionYou are working for Macrohard company in data structures department. After failing your previous task about key insertion you were asked to write a new data structure that would be a 阅读全文