Compilare: main.cpp: In function 'bool e_convex(std::vector<punct>&)': main.cpp:45:21: 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] 45 | for(ll i = 2; i < v.size(); i++){ | ~~^~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:96:33: 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] 96 | for(ll k = 0; k + 1 < st.size(); k++){ | ~~~~~~^~~~~~~~~~~ main.cpp:102:33: 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] 102 | for(ll k = 0; k + 1 < dr.size(); k++){ | ~~~~~~^~~~~~~~~~~ main.cpp:113:33: 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] 113 | for(ll k = 0; k < st.size(); k++) s[ st[k].idx ] = 'I'; | ~~^~~~~~~~~~~ main.cpp:114:33: 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] 114 | for(ll k = 0; k < dr.size(); k++) s[ dr[k].idx ] = 'V'; | ~~^~~~~~~~~~~