Compilare: main.cpp: In function 'bool e_convex(std::vector<punct>&)': main.cpp:40:21: warning: comparison of integer expressions of different signedness: 'll' {aka 'long long int'} and 'std::vector<punct>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 40 | for(ll i = 2; i < v.size(); i++){ | ~~^~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:89:33: warning: comparison of integer expressions of different signedness: 'll' {aka 'long long int'} and 'std::vector<punct>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 89 | for(ll k = 0; k + 1 < st.size(); k++){ | ~~~~~~^~~~~~~~~~~ main.cpp:95:33: warning: comparison of integer expressions of different signedness: 'll' {aka 'long long int'} and 'std::vector<punct>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 95 | for(ll k = 0; k + 1 < dr.size(); k++){ | ~~~~~~^~~~~~~~~~~ main.cpp:106:33: warning: comparison of integer expressions of different signedness: 'll' {aka 'long long int'} and 'std::vector<punct>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 106 | for(ll k = 0; k < st.size(); k++) s[ st[k].idx ] = 'I'; | ~~^~~~~~~~~~~ main.cpp:107:33: warning: comparison of integer expressions of different signedness: 'll' {aka 'long long int'} and 'std::vector<punct>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 107 | for(ll k = 0; k < dr.size(); k++) s[ dr[k].idx ] = 'V'; | ~~^~~~~~~~~~~