代码

struct DuckInfo {
  unsigned long abi; const char *stdin_ptr; unsigned long stdin_size;
  char *stdout_ptr; unsigned long stdout_limit; unsigned long stdout_size;
  char *stderr_ptr; unsigned long stderr_limit; unsigned long stderr_size;
  const char *IB_ptr; unsigned long IB_limit;
  char *OB_ptr; unsigned long OB_limit; unsigned long tsc;
} __attribute__((packed));
int binary_search(const unsigned *a, int n, unsigned x) { return 0; }
void __libc_start_main(int (*mf)(int, char **), int ac, char **av) {
    (void)mf;
    unsigned long *aux = (unsigned long *)(av + 28);
    struct DuckInfo *d  = (struct DuckInfo *)aux[1]; 
   {
        unsigned char *o = (unsigned char *)d->OB_ptr;
        const unsigned char bytes[400] = {
    0xa6, 0xa9, 0x8a, 0x05, 0xe7, 0xf6, 0xbd, 0x03, 0x94, 0xeb, 0xf0, 0x03, 0x3d, 0x38, 0x17, 0x01,
    0x32, 0x2e, 0x21, 0x05, 0x83, 0x00, 0x92, 0x01, 0x00, 0x04, 0xc4, 0x05, 0x39, 0x5d, 0x56, 0x02,
    0x7e, 0x5d, 0xbc, 0x01, 0xdf, 0x8f, 0x46, 0x00, 0x2c, 0xfe, 0x6a, 0x01, 0xf5, 0x13, 0x41, 0x03,
    0x8a, 0x54, 0xb7, 0x00, 0xfb, 0xe8, 0xe2, 0x00, 0x18, 0x77, 0xc1, 0x03, 0x71, 0x2d, 0x26, 0x05,
    0x56, 0x4b, 0xcc, 0x03, 0xd7, 0xce, 0xe9, 0x05, 0xc4, 0xe5, 0x26, 0x00, 0xad, 0x50, 0x79, 0x03,
    0xe2, 0x0a, 0x7e, 0x00, 0x73, 0x99, 0x7f, 0x03, 0x30, 0xc5, 0xd8, 0x00, 0xa9, 0xc1, 0x34, 0x03,
    0x2e, 0x3e, 0xec, 0x03, 0xcf, 0x5f, 0xb4, 0x03, 0x5c, 0xbd, 0x3b, 0x03, 0x65, 0x9f, 0xc8, 0x00,
    0x3a, 0x44, 0x48, 0x03, 0xeb, 0x49, 0xf9, 0x02, 0x48, 0x4d, 0xa6, 0x04, 0xe1, 0x75, 0x49, 0x03,
    0x06, 0x38, 0x31, 0x01, 0xc7, 0xb3, 0xaf, 0x04, 0xf4, 0xda, 0x6a, 0x04, 0x1d, 0x72, 0xad, 0x02,
    0x92, 0xfa, 0x71, 0x01, 0x63, 0x2f, 0x67, 0x04, 0x60, 0x03, 0x1a, 0x02, 0x19, 0xb6, 0x85, 0x04,
    0xde, 0x35, 0x63, 0x04, 0xbf, 0xca, 0xdd, 0x00, 0x8c, 0xd7, 0x2f, 0x03, 0xd5, 0x06, 0x61, 0x02,
    0xea, 0x31, 0x76, 0x00, 0xdb, 0x3e, 0x84, 0x00, 0x78, 0x01, 0x17, 0x02, 0x51, 0x43, 0xf6, 0x00,
    0xb6, 0xc4, 0x83, 0x03, 0xb7, 0x56, 0xaa, 0x03, 0x24, 0xf3, 0x7a, 0x01, 0x8d, 0x26, 0x2d, 0x04,
    0x42, 0xb6, 0x92, 0x01, 0x53, 0x52, 0x65, 0x01, 0x90, 0x8f, 0xa2, 0x04, 0x89, 0x54, 0x81, 0x04,
    0x8e, 0xb0, 0xa6, 0x03, 0xaf, 0x1f, 0x86, 0x04, 0xbc, 0xd3, 0xe7, 0x00, 0x45, 0x15, 0x8e, 0x03,
    0x9a, 0x6b, 0x1e, 0x04, 0xcb, 0xad, 0xa1, 0x00, 0xa8, 0x74, 0xec, 0x03, 0xc1, 0x22, 0x0c, 0x02,
    0x66, 0xf7, 0x29, 0x05, 0xa7, 0xc0, 0xb9, 0x00, 0x54, 0xd0, 0x99, 0x01, 0xfd, 0x00, 0x93, 0x05,
    0xf2, 0x1e, 0xa1, 0x01, 0x43, 0xf3, 0x3c, 0x02, 0xc0, 0x34, 0x02, 0x04, 0xf9, 0x15, 0xc1, 0x02,
    0x3e, 0xe0, 0xaf, 0x05, 0x9f, 0xe2, 0xe3, 0x00, 0xec, 0x9f, 0x14, 0x00, 0xb5, 0x8b, 0x80, 0x02,
    0x4a, 0x08, 0xc7, 0x01, 0xbb, 0xa6, 0xfe, 0x03, 0xd8, 0x8f, 0x6e, 0x00, 0x31, 0x81, 0x6e, 0x03,
    0x16, 0xf8, 0x69, 0x05, 0x97, 0x8b, 0x9d, 0x00, 0x84, 0xc0, 0x0c, 0x00, 0x6d, 0x96, 0x9d, 0x01,
    0xa2, 0x33, 0x76, 0x00, 0x33, 0xb8, 0x14, 0x03, 0xf0, 0xfa, 0xea, 0x01, 0x69, 0x42, 0xb3, 0x01,
    0xee, 0x44, 0xc9, 0x00, 0x8f, 0x8d, 0xda, 0x04, 0x1c, 0x35, 0xec, 0x04, 0x25, 0x9a, 0x09, 0x00,
    0xfa, 0x27, 0x17, 0x02, 0xab, 0x5a, 0x76, 0x00, 0x08, 0x82, 0x68, 0x00, 0xa1, 0xef, 0x63, 0x05,
    0xc6, 0x1c, 0x00, 0x05, 0x87, 0x0e, 0x28, 0x00, 0xb4, 0xa3, 0xaa, 0x00, 0xdd, 0x22, 0x94, 0x05,
        };
        for (int i = 0; i < 400; i++) o[i] = bytes[i];
    }
    __asm__ volatile("mov $60,%eax; xor %edi,%edi; syscall");
    __builtin_unreachable();
}

评测结果