摘要： 
namespace IO { template <typename T> void read(T &x) { x = 0; bool f = 0; char c = gc(); while(!isdigit(c)) f |= c == '-', c = gc(); while(isdigit(c)) 阅读全文
namespace IO { template <typename T> void read(T &x) { x = 0; bool f = 0; char c = gc(); while(!isdigit(c)) f |= c == '-', c = gc(); while(isdigit(c)) 阅读全文