为了防止被 D，代码进行了格式化（

#include <bits/stdc++.h>
using namespace std;
inline bool digit(char c) { return c >= 48 && c <= 57; }
static char BUF[1000000], *P1 = BUF, *P2 = BUF, OBUF[1000000], *P3 = OBUF;
inline char gc() { return P1 == P2 && (P2 = (P1 = BUF) + fread(BUF, 1, 1000000, stdin), P1 == P2) ? EOF : *P1++; }
inline void pc(register char x) { (P3 - OBUF < 1000000) ? (*P3++ = x) : (fwrite(OBUF, P3 - OBUF, 1, stdout), P3 = OBUF, *P3++ = x); }
template <typename item>
inline void uread(register item &x)
{
    register char c;
    for (; !digit(c = gc());)
        ;
    for (x = c ^ 48; digit(c = gc());)
        x = (x << 3) + (x << 1) + (c ^ 48);
}
template <typename item>
inline void read(register item &x)
{
    register char c;
    bool f = 0;
    for (; !digit(c = gc());)
        if (c == 45)
            f = 1;
    for (x = c ^ 48; digit(c = gc());)
        x = (x << 3) + (x << 1) + (c ^ 48);
    f && (x = -x);
}
static char STACK[20];
template <typename item>
inline void uwrite(register item x)
{
    if (!x)
        return pc(48);
    register short len = 0;
    for (; x; x /= 10)
        STACK[len++] = x % 10 ^ 48;
    for (; len--;)
        pc(STACK[len]);
}
template <typename item>
inline void write(item x)
{
    if (!x)
        return pc(48);
    if (x < 0)
        pc(45), x = -x;
    short len = 0;
    for (; x; x /= 10)
        STACK[len++] = x % 10 ^ 48;
    for (; len--;)
        pc(STACK[len]);
}
inline void endl() { pc(10); }
inline void space() { pc(32); }
inline void close() { fwrite(OBUF, P3 - OBUF, 1, stdout); }
int main()
{

    return close(), 0;
}