Compilare: main.cpp: In function 'int main()': main.cpp:121:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<Point>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 121 | for (i = 1; i < res.size(); i++) { | ~~^~~~~~~~~~~~ main.cpp:148:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<Point>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 148 | for (i = 0; i + 1 < hull.size(); i++) { | ~~~~~~^~~~~~~~~~~~~ main.cpp:152:31: warning: comparison of integer expressions of different signedness: 'std::vector<Point>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 152 | while(hull.size() > i + 2) hull.pop_back(); | ~~~~~~~~~~~~^~~~~~~ main.cpp:163:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<Point>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 163 | for (i = 0; i + 1 < hull.size(); i++) { | ~~~~~~^~~~~~~~~~~~~ main.cpp:164:31: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<Point>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 164 | for (j = i + 1; j + 1 < hull.size(); j++) { | ~~~~~~^~~~~~~~~~~~~ main.cpp:176:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<Point>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 176 | for (i = 0; i + 1 < hull.size(); i++) { | ~~~~~~^~~~~~~~~~~~~ main.cpp:186:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<Point>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 186 | for (i = 0; i + 1 < hull.size(); i++) { | ~~~~~~^~~~~~~~~~~~~ main.cpp:192:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<Point>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 192 | for (i = 0; i + 1 < hull.size(); i++) { | ~~~~~~^~~~~~~~~~~~~ main.cpp:204:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<Point>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 204 | for (i = 0; i + 1 < hull.size(); i++) { | ~~~~~~^~~~~~~~~~~~~