void Population::tournamentSelect(Population &lastPop){
    int k = 2, i, s1, s2;
    int size = lastPop.size();
    for(i = 0; i < size; i++){
        s1 = rand() % size;
        s2 = rand() % size;
        // cout << "Tournament:" << s1 << "<-->" << s2 << endl;
        mMembers.push_back(lastPop.getBetterOne(s1, s2));
        //mMembers.push_back(lastPop.getMember(i));
    }
    mMemberSize = size;
}