#include <iostream>
using namespace std;
int main() {
    int sum = 0;
    for(int i = 1; i <= 5; i++){
        if(i % 2 == 0){
            continue;
        }
        if(i == 5){
            break;
        }
        sum += i;
    }
    cout << sum;
    return 0;
}