Compilare: main.cpp: In function 'int main()': main.cpp:50:13: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<Circle> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 50 | while(j < order.size() && !areColinear(c.m, order[j][0].m)) | ~~^~~~~~~~~~~~~~ main.cpp:53:10: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<Circle> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 53 | if(j == order.size()){ | ~~^~~~~~~~~~~~~~~ main.cpp:63:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<Circle> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 63 | for(int i = 0; i < order.size(); i++){ | ~~^~~~~~~~~~~~~~ main.cpp:68:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<Circle>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 68 | for(int j = 0; j < order[i].size(); j ++){ | ~~^~~~~~~~~~~~~~~~~ main.cpp:81:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<Circle>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 81 | for(int j = 0; j < order[i].size(); j ++) | ~~^~~~~~~~~~~~~~~~~