//Bismillahirrahmanirrahim
#include<bits/stdc++.h>
using namespace std;
int main(){
// tipe data : (int, double, float) (string & char)
// int : hanya dapat menyimpan angka bulat (1, 2, 100, 0)
// double & float : dapat menyimpan angka bulat dan desimal (1.3, 19.0, 0.2)
// float -> desimal max 6 angka dibelakang koma
// double -> desimal max 12 angka dibelakang koma
// boolean -> hanya menyimpan nilai true (1) atau false (0)
//
// string : dapat menyimpan kata dan kalimat (fariji ganteng)
// char : dapat menyimpan huruf
//
// <tipe data> <nama data>;
// int n;
//
// cin >> n; input : 3
// cout << n; output : 3
// operator bilangan
// + = jumlah
// - = kurangi
// * = mengalikan
// / = membagi
// % = modulo
// a *= 2 -> a = a * 2
// a += 2 -> a = a + 2
// a -= 2 -> a = a - 2
// menyediakan 1 tipe data yg bisa kumasukin
// 8 56 8 * 7
// 7 42 7 * 6
// 1 0 1 * 0
// int k; -> 20, 60, 72
// cin >> k;
// k - 2
// cout << k; -> 18, 58, 70
// int rarw = 5;
// int p = 3.5;
// cin >> rarw;
// rarw %= 3 + 10 - 2;
// cout << rarw * p;
int tyan;
cin >> tyan;
if (tyan % 2 == 1) {
cout << tyan;
}
return 0;
// 1 : sediakan embernya (sesuai tipe data yg ingin dimasukan)
// 2 : sediakan fungsi untuk memasukan data
// 3 : operasikan data yg dimasukan
// 4 : keluarkan datanya
}
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