59. A bus is carrying sixth-grade students to visit a science and technology museum, buying 99 tickets, spending 280 yuan, where a one-way ticket costs 2 yuan per ticket, and a round-trip ticket costs 3 yuan per ticket. Therefore, among the 99 tickets, there are $\qquad$ one-way tickets and $\qqaud$ round-trip tickets.
Reference answer: $17 ; 82$