Compilare: main.cpp: In function 'std::vector<coord> infas(std::vector<coord>)': main.cpp:44:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<coord>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 44 | for(int i=0;i<a.size();i++) | ~^~~~~~~~~ main.cpp:54:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<coord>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 54 | for(int i=2;i<a.size();i++){ | ~^~~~~~~~~ main.cpp: In function 'int surf(std::vector<coord>)': main.cpp:73:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<coord>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 73 | for(int i=0;i<a.size()-1;i++){ | ~^~~~~~~~~~~