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    namespace FastIO {
        char buf[1 << 21], buf2[1 << 21], a[20], *p1 = buf, *p2 = buf, hh = '
    ';
        int p, p3 = -1;
    
        void read() {}
    
        void print() {}
    
        inline int getc() {
            return p1 == p2 && (p2 = (p1 = buf) + fread(buf, 1, 1 << 21, stdin), p1 == p2) ? EOF : *p1++;
        }
    
        inline void flush() {
            fwrite(buf2, 1, p3 + 1, stdout), p3 = -1;
        }
    
        template<typename T, typename... T2>
        inline void read(T &x, T2 &... oth) {
            int f = 0;
            x = 0;
            char ch = getc();
            while (!isdigit(ch)) {
                if (ch == '-')
                    f = 1;
                ch = getc();
            }
            while (isdigit(ch)) {
                x = x * 10 + ch - 48;
                ch = getc();
            }
            x = f ? -x : x;
            read(oth...);
        }
    
        template<typename T, typename... T2>
        inline void print(T x, T2... oth) {
            if (p3 > 1 << 20)
                flush();
            if (x < 0)
                buf2[++p3] = 45, x = -x;
            do {
                a[++p] = x % 10 + 48;
            } while (x /= 10);
            do {
                buf2[++p3] = a[p];
            } while (--p);
            buf2[++p3] = hh;
            print(oth...);
        }
    } // namespace FastIO
    #define read FastIO::read
    #define print FastIO::print
    //======================================
    int main() {
    #ifndef ONLINE_JUDGE
        freopen("1.txt", "r", stdin);
        //freopen("2.txt", "w", stdout);
    #endif
        //======================================
    
        //======================================
        FastIO::flush();
        return 0;
    }
    
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  • 原文地址:https://www.cnblogs.com/Accpted/p/12826651.html
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