Compilare: main.cpp: In function 'void Graham_scan(std::vector<Punct>&, std::vector<Punct>&)': main.cpp:31:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<Punct>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 31 | for( i = 1; i < v.size(); ++i) | ~~^~~~~~~~~~ main.cpp:32:51: warning: suggest parentheses around '&&' within '||' [-Wparentheses] 32 | if( v[i].y < Start.y or v[i].y == Start.y and v[i].x < Start.x) main.cpp:42:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<Punct>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 42 | for( i = 0; i < v.size(); ++i ) | ~~^~~~~~~~~~