Eroare de compilare: main.cpp: In function 'int main()': main.cpp:39:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 39 | for (int i=0;i<citys.size();i++) { | ~^~~~~~~~~~~~~ main.cpp:40:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 40 | for (int j=0;j<citys.size();j++) { | ~^~~~~~~~~~~~~ main.cpp:41:18: error: 'sqrt' was not declared in this scope 41 | float dist=sqrt((citys[i].first-citys[j].first)*(citys[i].first-citys[j].first)+ | ^~~~ Non zero exit status: 1