摘要：
struct Matrix { int a[2][2]; Matrix() { memset(a,0,sizeof(a)); } void init() { for(int i=0;i<2;i++) for(int j=0;j<2;j++) a[i][j]=(i==j); } Matrix oper 阅读全文
摘要：
Sasha and Array time limit per test 5 seconds memory limit per test 256 megabytes input standard input output standard output Sasha and Array time lim 阅读全文
摘要：
Efim and Strange Grade time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output Efim and Strange G 阅读全文