minimse the rows

// link https://leetcode.com/discuss/interview-question/1371222/Google-Questions
void f(vector<int> &v){
    map<int,int> m;
    for(auto &c: v){
        auto t=m.upper_bound(c);
        if(t!=m.end()) m.erase(t->first);
        m[c]=1;
    }
    cout<<m.size()<<" ";
}