[ACTF新生赛2020]easyre

#include <stdio.h>

#include <string.h>

int main()

{

    char v4[] = { 42, 70, 39, 34, 78, 44, 34, 40, 73, 63, 43, 64, 0 };

    int X;

    unsigned char _data_start_[] =

    {

        126, 125, 124, 123, 122, 121, 120, 119, 118, 117,

        116, 115, 114, 113, 112, 111, 110, 109, 108, 107,

        106, 105, 104, 103, 102, 101, 100, 99, 98, 97,

        96, 95, 94, 93, 92, 91, 90, 89, 88, 87,

        86, 85, 84, 83, 82, 81, 80, 79, 78, 77,

        76, 75, 74, 73, 72, 71, 70, 69, 68, 67,

        66, 65, 64, 63, 62, 61, 60, 59, 58, 57,

        56, 55, 54, 53, 52, 51, 50, 49, 48, 47,

        46, 45, 44, 43, 42, 41, 40, 39, 38, 37,

        36, 35, 32, 33, 34, 0

    };

    int v4_length = sizeof(v4) / sizeof(v4[0]);

    int data_start_length = sizeof(_data_start_) / sizeof(_data_start_[0]);

    for (int i = 0; i < v4_length; i++)

    {

        for (int j = 0; j < data_start_length; j++)

        {

            if (v4[i] == _data_start_[j])

            {

                X = j + 1;

                printf("%c", X);

            }

        }

    }

    return 0;

}