#include <iostream>
#include <cstring>

void set(int m[][4], int i, int j, int v)
{
    m[i][j] = v;
    m[j][i] = v;
}

int main()
{

    const int n = 4;

    int graph[n][n];
    memset(graph, -1, n * n * sizeof(int));

    std::string cities[] = { "Pordenone", "Udine", "Gorizia", "Trieste" };

    set(graph, 0, 1, 50);
    set(graph, 1, 2, 40);
    set(graph, 1, 3, 80);
    set(graph, 2, 3, 20);

    for (int i = 0; i < n; ++i)
        for (int j = 0; j < n; ++j)
            if (i != j)
                std::cout << (
                    graph[i][j] != -1
                        ? cities[i] + " -> " + cities[j] + " : " + std::to_string(graph[i][j]) + "\n"
                        : "");

}