Compilare: main.cpp:1:2: warning: #import is a deprecated GCC extension [-Wdeprecated] #import<bits/stdc++.h> ^~~~~~ main.cpp:2:26: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type] using namespace std;main(){ifstream fin("scmax.in");ofstream fout("scmax.out");vector<int>v;int n,x;for(fin>>n;n--;){fin>>x;auto it=upper_bound(v.begin(),v.end(),x-1);if(it==v.end())v.push_back(x);else*it=x;}fout<<v.size()<<'\n';for(auto it:v)fout<<it<<' ';} ^