Replace
this with below what you want:
#define ADMIN_ALL 0 //Everyone
#define ADMIN_IMMUNITY 1 //Flag "a", immunity
#define ADMIN_RESERVATION 2 //Flag "b", reservation
#define ADMIN_KICK 4 //Flag "c", kick
#define ADMIN_BAN 8 //Flag "d", ban
#define ADMIN_SLAY 16 //Flag "e", slay
#define ADMIN_MAP 32 //Flag "f", map change
#define ADMIN_CVAR 64 //Flag "g", cvar change
#define ADMIN_CFG 128 //Flag "h", config execution
#define ADMIN_CHAT 256 //Flag "i", chat
#define ADMIN_VOTE 512 //Flag "j", vote
#define ADMIN_PASSWORD 1024 //Flag "k", sv_password
#define ADMIN_RCON 2048 //Flag "l", rcon access
#define ADMIN_LEVEL_A 4096 //Flag "m", custom
#define ADMIN_LEVEL_B 8192 //Flag "n", custom
#define ADMIN_LEVEL_C 16384 //Flag "o", custom
#define ADMIN_LEVEL_D 32768 //Flag "p", custom
#define ADMIN_LEVEL_E 65536 //Flag "q", custom
#define ADMIN_LEVEL_F 131072 //Flag "r", custom
#define ADMIN_LEVEL_G 262144 //Flag "s", custom
#define ADMIN_LEVEL_H 524288 //Flag "t", custom
#define ADMIN_MENU 1048576 //Flag "u", menus
#define ADMIN_ADMIN 16777216 //Flag "y", default admin
#define ADMIN_USER 33554432 //Flag "z", default user