Euler02

#include <iostream>
using namespace std;
    int main() {

        int i = 1;
        int j = 1;
        int k;
        int sum = 0;

        while (j <= 4000000) {

            if (j % 2 == 0)
                sum += j;

            k = j;
            j += i;
            i = k;

        }

        cout << sum << endl;

        return 0;


    }