Compilare: main.cpp: In function 'void recursivitate(int, int)': main.cpp:45:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 45 | for(i=0;i<c.size();++i) | ~^~~~~~~~~ main.cpp:47:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 47 | for(j=i+1;((j<c.size())&&(c[j].second-c[i].second)*(c[j].second-c[i].second)<=dis*dis);++j) | ~^~~~~~~~~