fread 快速读入挂

浅浅的花香味﹌ 2022-01-28 05:04 218阅读 0赞

struct FastIO {
        static const int S = 1e7;
        int wpos;
        char wbuf[S];
        FastIO() : wpos(0) {}
        inline int xchar() {
            static char buf[S];
            static int len = 0, pos = 0;
            if (pos == len)
                pos = 0, len = fread(buf, 1, S, stdin);
            if (pos == len) exit(0);
            return buf[pos++];
        }
        inline int xuint() {
            int c = xchar(), x = 0;
            while (c <= 32) c = xchar();
            for (; '0' <= c && c <= '9'; c = xchar()) x = x * 10 + c - '0';
            return x;
        }
        inline int xint()
        {
            int s = 1, c = xchar(), x = 0;
            while (c <= 32) c = xchar();
            if (c == '-') s = -1, c = xchar();
            for (; '0' <= c && c <= '9'; c = xchar()) x = x * 10 + c - '0';
            return x * s;
        }
        inline void xstring(char *s)
        {
            int c = xchar();
            while (c <= 32) c = xchar();
            for (; c > 32; c = xchar()) * s++ = c;
            *s = 0;
        }
        inline void wchar(int x)
        {
            if (wpos == S) fwrite(wbuf, 1, S, stdout), wpos = 0;
            wbuf[wpos++] = x;
        }
        inline void wint(ll x)
        {
            if (x < 0) wchar('-'), x = -x;
            char s[24];
            int n = 0;
            while (x || !n) s[n++] = '0' + x % 10, x /= 10;
            while (n--) wchar(s[n]);
            wchar('\n');
        }
        inline void wstring(const char *s)
        {
            while (*s) wchar(*s++);
        }
        ~FastIO()
        {
            if (wpos) fwrite(wbuf, 1, wpos, stdout), wpos = 0;
        }
    } io;