No captcha required for preview. Please, do not write just a link to original writeup here.#include<stdio.h>#include<stdlib.h>int main(){  char s[] = "O`EbNgQDfB{FKdHuiSx``F";  int seed = 0x42;  srand(seed);  int v6;  int chas[] = {25,9,38,22,33,21,40,2,9,48,47,46,46,34,33,7,26,39,26,15,18,40,33};    for (int i = 0; ; ++i )  {     v6 = strlen(s);    if ( v6 < i )      break;     printf("%c",(int)s[i]^chas[i]);  }}生成key，运行文件输入得到flag