Devin的专栏

Description Programs executed concurrently on a uniprocessor system appear to be executed at the same time, but in reality the single CPU alternates between the programs, executing some number of i

Description There is a famous railway station in PopPush City. Country there is incredibly hilly. The station was built in last century. Unfortunately, funds were extremely limited that time. It wa

Description Problem B Broken Keyboard (a.k.a. Beiju Text) You're typing a long text with a broken keyboard. Well it's not so badly broken. The only problem with the keyboard is that sometimes

Description Suppose you have to evaluate an expression like A*B*C*D*E where A,B,C,D and E are matrices. Since matrix multiplication is associative, the order in which multiplications are performed

#include #include #include #include using namespace std; const int maxn = 100000+5; int n,m; int Left[maxn],Right[maxn]; void link(int L ,int R){ Right[L] = R,Left[R] = L; } int main(){