一堆对于 code 来说有用的东西

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一堆对于 code 来说有用的东西：

代码

方便/加快用的宏：

namespace IO {
        char buf[1 << 20], *p1 = buf, *p2 = buf;
        char out[1 << 20], *p3 = out;
        #define getchar() (p1 == p2 && (p2 = (p1 = buf) + fread(buf, 1, 1 << 20, stdin), p1 == p2) ? EOF : *p1++)
        #define putchar(ch) (p3 == out + (1 << 20) && fwrite(p3 = out, 1, 1 << 20, stdout), *p3++ = (ch))
        class Flusher {
        public:
            ~Flusher() {
                fwrite(p3 = out, 1, 1 << 20, stdout);
            }
        } flusher;
        template<typename T>
        inline int read(T &x)
        {
            x = 0;
            int op = 1;
            char ch = getchar();
            while (!isdigit(ch)) {
                if (ch == EOF) {
                    return EOF;
                }
                if (ch == '-') {
                    op = -1;
                }
                ch = getchar();
            }
            while (isdigit(ch)) {
                x = (x << 1) + (x << 3) + (ch ^ 48);
                ch = getchar();
            }
            x *= op;
            return 0;
        }
        template<typename T>
        inline void write(T x)
        {
            if (x < 0) {
                x = -x;
                putchar('-');
            }
            static short obuf[50], top = 0;
            do {
                obuf[++top] = x % 10;
                x /= 10;
            } while(x);
            while (top) {
                putchar(obuf[top--] | 48);
            }
        }
    };

手搓 STL

stack:

对拍器：

#include <bits/stdc++.h>
using namespace std;

#define LL long long
#define Pii pair<int, int>
#define ULL unsigned long long

namespace gdb7
{
    int main() {
        int f1 = system("g++.exe mine.cpp -o mine -O2 -std=c++14 > nul");
        int f2 = system("g++.exe tj.cpp -o tj -O2 -std=c++14 > nul");
        int f3 = system("g++.exe data.cpp -o data -O2 -std=c++14 > nul");
        if (f1 || f2 || f3) {
            printf("Not Found mine.cpp, tj.cpp or data.cpp");
            system("pause");
            exit(0);
        }
        int num = 0;
        while (true) {
            ++num;
            printf("Generating data\r");
            system("data.exe > data.in");
            system("tj.exe < data.in > data.out");
            clock_t start2 = clock();
            printf("Running on Test %d\r", num);
            int retur = system("mine.exe < data.in > mine.out");
            clock_t end2 = clock();
            if (retur) { // RE
                printf("Runtime Error on Test %d\nThe data is:\n input:\n", num);
                system("type data.in");
                printf("output:\n");
                system("type data.out");
                printf("Your Program return %d\n", retur);
                system("pause");
            } else if ((double)(end2 - start2) / CLOCKS_PER_SEC > 1000) { // TLE
                printf("Time Limit Exceeded on Test %d\nThe data is:\ninput:\n", num);
                system("type data.in");
                printf("output:\n");
                system("type data.out");
                printf("Your Program used %.2lf s\n", (double)(end2 - start2) / CLOCKS_PER_SEC * 1000);
                system("pause");
            } else if (system("fc data.out mine.out > nul")) { // WA
                printf("Wrong Answer on Test %d\nThe data is:\ninput:\n", num);
                system("type data.in");
                printf("output:\n");
                system("type data.out");
                printf("your output:\n");
                system("type mine.out");
                printf("diffrent: \n");
                system("fc data.out mine.out");
                putchar('\n');
                system("pause");
            } else { // AC
                printf("Accepted on Test %d\n", num);
            }
        }
        return 0;
    }
};

int main()
{
    return gdb7::main();
}

文档：

不常见但有用的函数：