警示后人

H_dream @ 2024-04-13 15:41:37

by Judy039 @ 2024-04-13 15:44:50

好

by Chizuru_Ichinose @ 2024-04-19 20:31:39

%%%

by WZwangchongming @ 2024-05-02 14:52:51

补一个：

ios::sync_with_stdio(0);
cin.tie(0); cout.tie(0);

喜欢cin的可以加上，相当于取消cincout缓冲区，可以极大提升cincout的效率。注意加上上面两行后，就不要cin和scanf，cout和printf混用了

另外，我喜欢快读快写[doge]

贴一个板子在这儿

namespace fastIO {
    inline int read() {
        int res = 0, f = 1;
        char ch = getchar();
        while( !(ch >= '0' && ch <= '9') ) {
            if(ch == '-') f = -1;
            ch = getchar();
        }
        while(ch >= '0' && ch <= '9') {
            res = (res << 1) + (res << 3) + (ch ^ 48);
            ch = getchar();
        }
        return res * f;
    }

    void write(int x) {
        static int sta[35];
        int top = 0;
        do {
            sta[top++] = x % 10;
            x /= 10;
        } while(x);
        while(top) putchar(sta[--top] ^ 48);
    }

    void writeln(int x) {
        write(x);
        putchar('\n');
    }
}