Compilare: main.cpp: In function 'int main()': main.cpp:119:45: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<std::pair<long long int, std::pair<long long int, std::pair<long long int, long long int> > > >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 119 | if(vec[mij].first>=x && (mij==vec.size()-1 || vec[mij-1].first<x)) | ~~~^~~~~~~~~~~~~~ main.cpp:126:26: warning: 'mij' may be used uninitialized [-Wmaybe-uninitialized] 126 | fout<<vec[mij].second.first<<" "; | ^ main.cpp:113:23: note: 'mij' was declared here 113 | int st,dr,mij; | ^~~