#include <iostream>
using namespace std;
int main()
{
int k1, k2;
int a[5][2] = { 1,2,
2,1,
1,3,
3,4,
4,2 };
for (int i = 0; i < 5; i++)
cout << a[i][0] << " " << a[i][1] << "\n";
cout << "input 2 cities\n";
cin >> k1;
cin >> k2;
cout << k1 << " " << k2 << "?\n";
int p = 0;
for (int i = 0; i < 5; i++)
{
if ((a[i][0] == k1) && (a[i][1] == k2)) p = 1;
}
if (p == 1) cout << "yes!"; else cout << "no :(";
for (int i = 0; i < 5; i++)
for (int j= 0;j<5;j++)
{
if ((a[i][0] == k1) && (a[j][1] == k2) && (a[i][1] == a[j][0]))
cout <<"\n" << k1 << " -> " << a[i][1] << " -> " << k2 << "\n";
}
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