int selects3_construct(selects3 *select, int n, uint *buf);
int selects3_select(selects3 *select, int i);
int selects3_rank(selects3 *select, int i);
int selects3_construct(selects3 *select, int n, uint *buf);
int selects3_select(selects3 *select, int i);
int selects3_rank(selects3 *select, int i);