int migratoryBirds(vector<int> arr) {
    map<int, int> map;
    for(int i : arr){
        map[i]++;
    }
    int largest = 0;
    int bird;
    for(auto i : map){
        if(i.second > largest){
            largest = i.second;
            bird = i.first;
        }
    }
    int temp = 0;
    for(auto i : map){
        if(i.second == largest){
            temp++;
        }
    }
    if(temp > 1){
        for(auto i : map){
            if(i.second == largest){
                if(i.first < bird){
                    bird = i.first;
                }
            }
        }
    } 
    return bird;
}