4/191 perechi

#include <iostream>
#include <fstream>
using namespace std;

ifstream fin("PERECHI.txt");

typedef struct
{
    unsigned x, y;
} PER;

int main()
{
    PER p[100];
    unsigned n, i;
    fin >> n;
    for (i = 0; i < n; i++)
        fin >> p[i].x >> p[i].y;

    for (i = 0; i < n; i++)
    {
        int x = p[i].x;
        int y = p[i].y;
        int inv = 0;

        while (y)
        {
            inv = 10 * inv + y % 10;
            y /= 10;
        }

        if (x == inv)
            cout << p[i].x << ' ' << p[i].y << endl;
    }

    return 0;
}