Reverse the Logic

Decompiled validator. The flag bytes are XOR-encrypted with key 0x2a. Recover the plaintext:

char key = 0x2a;
unsigned char enc[] = { 0x59, 0x4b, 0x43, 0x41, 0x45, 0x51, 0x59, 0x5e, 0x4b, 0x5e, 0x43, 0x49, 0x75, 0x4b, 0x44, 0x4b, 0x46, 0x53, 0x59, 0x43, 0x59, 0x75, 0x5d, 0x43, 0x44, 0x59, 0x75, 0x4b, 0x4d, 0x4b, 0x43, 0x44, 0x57 };
for (int i = 0; i < sizeof(enc); i++) putchar(enc[i] ^ key);