#include <iostream>
using namespace std;
 
int main() {
    int num, p, ep;
    cout << "Dwse arithmo: ";
    cin >> num;
    p = num - 1;
    ep = num + 1;
    cout << "Prohgoumenos arithmos: " << p << endl;
    cout << "Epomenos arithmos: " << ep << endl;
    return 0;
}
				I2luY2x1ZGUgPGlvc3RyZWFtPgp1c2luZyBuYW1lc3BhY2Ugc3RkOwoKaW50IG1haW4oKSB7CiAgICBpbnQgbnVtLCBwLCBlcDsKICAgIGNvdXQgPDwgIkR3c2UgYXJpdGhtbzogIjsKICAgIGNpbiA+PiBudW07CiAgICBwID0gbnVtIC0gMTsKICAgIGVwID0gbnVtICsgMTsKICAgIGNvdXQgPDwgIlByb2hnb3VtZW5vcyBhcml0aG1vczogIiA8PCBwIDw8IGVuZGw7CiAgICBjb3V0IDw8ICJFcG9tZW5vcyBhcml0aG1vczogIiA8PCBlcCA8PCBlbmRsOwogICAgcmV0dXJuIDA7Cn0=