提供一份非常优秀的快读模板

namespace IN {
    const int MAX_INPUT = 1000000;
    #define getc() (p1 == p2 && (p2 = (p1 = buf) + inbuf -> sgetn(buf, MAX_INPUT), p1 == p2) ? EOF : *p1++)
    char buf[MAX_INPUT], *p1, *p2;
    template <typename T> inline bool redi(T &x) {
        static streambuf *inbuf = cin.rdbuf();
        x = 0;
        register int f = 0, flag = false;
        register char ch = getc();
        while (!isdigit(ch)) {
            if (ch == '-') f = 1;
        ch = getc();
        }
        if (isdigit(ch)) x = x * 10 + ch - '0', ch = getc(),flag = true;
        while (isdigit(ch)) {
            x = x * 10 + ch - 48;
            ch = getc();
        }
        x = f ? -x : x ;
        return flag;
    }
    template <typename T,typename ...Args> inline bool redi(T& a,Args& ...args) {
       return redi(a) && redi(args...);
    }
    #undef getc
}

using IN::redi;

读入用redi(...)

我的TLE代码1.70s->1.44s