long long getm(long long k,vector<long long>r1,vector<long long>r2){
    long long rem = r1.size() - k;
    long long n = r1.size();
    vector<pair<long long,long long>>vp;
    for(long long i=0;i<n;i++){
        vp.push_back({abs(r1[i]-r2[i]),i});
    }
    sort(vp.begin(),vp.end());
    long long tt = 0;
    for(long long i=n-1;i>=0;i--){
        long long in = vp[i].second;
        if(r1[in]>r2[in]){
            if(k!=0){
                tt += r1[in];
                k--;
            }
            else {
                tt += r2[in];
                rem--;
            }
        }
        else{
             if(rem!=0){
                tt += r2[in];
                rem--;
            }
            else {
                tt += r1[in];
                k--;
            }
        }
    }
    return tt;
}