11. Odd / Even Position

#include <iostream>
#include <cmath>
#include <string>
using namespace std;

int main() {
    int n;
    cin >> n;

    double a;
    double oddmin = 10000.0, oddmax = -10000.0, oddsum = 0, evenmin = 10000.0, evenmax = -10000.0, evensum = 0;
    bool haseven = false, hasodd = false;
    if (n > 0) {
        for (int i = 1; i <= n; i++)
        {
            cin >> a;
            if (i % 2 == 0)
            {
                if (a<evenmin) {
                    evenmin = a;
                }
                if (a>evenmax)
                {
                    evenmax = a;
                }
                evensum += a;
                haseven = true;
            }
            else
            {
                if (a<oddmin) {
                    oddmin = a;
                }
                if (a>oddmax)
                {
                    oddmax = a;
                }
                oddsum += a;
                hasodd = true;
            }
        }

    }
    cout << "OddSum=" << oddsum << ", ";
    if (!hasodd) {
        cout << "OddMin=" << "No, ";
        cout << "OddMax=" << "No, ";
    }
    else
    {
        cout << "OddMin=" << oddmin << ", ";
        cout << "OddMax=" << oddmax << ", ";
    }
    cout << "EvenSum=" << evensum << ", ";
    if (!haseven) {
        cout << "EvenMin=" << "No, ";
        cout << "EvenMax=" << "No";
    }
    else
    {
        cout << "EvenMin=" << evenmin << ", ";
        cout << "EvenMax=" << evenmax << endl;
    }
    return 0;
}