#include <iostream>
#include <queue>
#include <vector>
#include <functional>

int main() {
    std::priority_queue<int, std::vector<int>, std::greater<int>> departures;
    departures.push(35); departures.push(10); departures.push(25);
    while (!departures.empty()) {
        std::cout << "Departure: " << departures.top() << '\n';
        departures.pop();
    }
}