Compilare: main.cpp: In function 'void solve(int, int)': main.cpp:36:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<point>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 36 | for(int i=0;i<vec.size();i++) | ~^~~~~~~~~~~ main.cpp:37:32: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<point>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 37 | for(int j=i+1;j<vec.size();j++) | ~^~~~~~~~~~~