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- #include <iostream>
- using namespace std;
- int main() {
- long long a;
- cin >> a;
- if(a == 1) {
- cout << 1 << endl;
- }
- else {
- long long poceten_broj = (a - 2) / 4 * 20;
- poceten_broj += 2;
- long long desetka = (a / 10) % 10;
- long long cifra = a % 10;
- if(desetka % 2 == 1) {
- if(cifra == 0 or cifra == 4 or cifra == 8) {
- cout << poceten_broj << endl;
- }
- else if(cifra == 1 or cifra == 5 or cifra == 9) {
- cout << poceten_broj + 2 << endl;
- }
- else if(cifra == 2 or cifra == 6) {
- cout << poceten_broj + 6 << endl;
- }
- else {
- cout << poceten_broj + 14 << endl;
- }
- }
- else {
- if(cifra == 0 or cifra == 4 or cifra == 8) {
- cout << poceten_broj + 6 << endl;
- }
- else if(cifra == 1 or cifra == 5 or cifra == 9) {
- cout << poceten_broj + 14 << endl;
- }
- else if(cifra == 2 or cifra == 6) {
- cout << poceten_broj << endl;
- }
- else {
- cout << poceten_broj + 2 << endl;
- }
- }
- }
- return 0;
- }
- // 1, 2, 4, 8, 16, 22, 24, 28, 36, 42, 44, 48, 56
- // 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13
- // 2, 6, 10, 14, 18, 22, 26, 30, 34, 38, 42, 44, 48, 52
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