Compilare: main.cpp: In function 'int main()': main.cpp:72:31: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 72 | for(int l=0; l<vec.size(); l++) | ~^~~~~~~~~~~ main.cpp:75:28: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 75 | while(l<vec.size()-1 && vec[l].first==vec[l+1].first) | ~^~~~~~~~~~~~~ main.cpp:61:14: warning: 'cul' may be used uninitialized in this function [-Wmaybe-uninitialized] 61 | char cul; | ^~~ main.cpp:92:41: warning: 'indc' may be used uninitialized in this function [-Wmaybe-uninitialized] 92 | out<<indl+1<<" "<<indc+1<<"\n"<<cul; | ^~~ main.cpp:92:22: warning: 'indl' may be used uninitialized in this function [-Wmaybe-uninitialized] 92 | out<<indl+1<<" "<<indc+1<<"\n"<<cul; | ^~~