特性介绍

Engine Model: VR38DETT

年度迭代升级，主要在以下方面做出更新：

1. 新增支持常用数据类型：char 数组，以及浮点型
2. 扩大 bufl = 1 << 20 ，防止部分 RE 情况
3. 常数优化，增强易用性

源代码

namespace GTR {
    const int bufl = 1 << 15;
    char buf[bufl], *s = buf, *t = buf;
    inline int fetch() {
        if (s == t) { t = (s = buf) + fread(buf, 1, bufl, stdin); if (s == t) return EOF; }
        return *s++;
    }
    inline int read() {
        int a = 0, b = 1, c = fetch();
        while (c < 48 || c > 57) b ^= c == '-', c = fetch();
        while (c >= 48 && c <= 57) a = (a << 1) + (a << 3) + c - 48, c = fetch();
        return b ? a : -a;
    }
    inline double readLf() {
        int b = 1, c = fetch(); double a = 0.00;
        while (c < 48 || c > 57) b ^= c == '-', c = fetch();
        while (c >= 48 && c <= 57) a = a * 10.00 + c - 48, c = fetch();
        if (c == '.') {
            c = fetch(); double t = 1.00;
            while (c >= 48 && c <= 57) a = a * 10.00 + c - 48, c = fetch(), t *= 10.000;
            a /= t;
        }
        return b ? a : -a;
    }

    inline int readStr(char *s) {    
        int n = 0; char c;
        for (n = 1; (c = fetch()) != '\n' && c != ' ' && c != EOF; ++ n) s[n] = c;
        return n - 1;
    }
} using GTR::read;

20211026 中期改款

Engine Model: VR46DETT

新增特性

增加 template 模板类功能，支持整形读入自定义数据类型(int/long long)

此外建议一般情况下将 bufl 调成 1 << 15

源代码

namespace GTR {
    const int bufl = 1 << 15;
    char buf[bufl], *s = buf, *t = buf;
    inline int fetch() {
        if (s == t) { t = (s = buf) + fread(buf, 1, bufl, stdin); if (s == t) return EOF; }
        return *s++;
    }
    template < class T >
    inline T read() {
        T a = 0, b = 1, c = fetch();
        while (c < 48 || c > 57) b ^= c == '-', c = fetch();
        while (c >= 48 && c <= 57) a = (a << 1) + (a << 3) + c - 48, c = fetch();
        return b ? a : -a;
    }
} using GTR::read;