Compilare: main.cpp: In function 'bool e_convex(std::vector<punct>&)': main.cpp:39:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<punct>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 39 | for(int i = 2; i < v.size(); i++){ | ~~^~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:86:34: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<punct>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 86 | for(int k = 0; k + 1 < st.size(); k++){ | ~~~~~~^~~~~~~~~~~ main.cpp:92:34: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<punct>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 92 | for(int k = 0; k + 1 < dr.size(); k++){ | ~~~~~~^~~~~~~~~~~ main.cpp:105:34: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<punct>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 105 | for(int k = 0; k < st.size(); k++) s[ st[k].idx ] = 'I'; | ~~^~~~~~~~~~~ main.cpp:106:34: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<punct>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 106 | for(int k = 0; k < dr.size(); k++) s[ dr[k].idx ] = 'V'; | ~~^~~~~~~~~~~