typedef struct {
NSString *activty;
NSString *place;
float latitude;
float longitude;
} event;
typedef struct {
event *thing;
Node *next;
} Node;
typedef struct {
NSString *activty;
NSStypedef struct {
NSString *activty;
NSString *place;
float latitude;
float longitude;
} event;
typedef struct {
event *thing;
Node *next;
} Node;
typedef struct {
NSString *activty;
NSS