Compilare: main.cpp: In function 'int main()': main.cpp:21:29: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 21 | for(int i = 0, j = 1; i < mycoef.size(); i += 2, j += 1) { | ~~^~~~~~~~~~~~~~~ main.cpp:22:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 22 | if(i < mycoef.size()) { | ~~^~~~~~~~~~~~~~~ main.cpp:25:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 25 | if(i + 1 < mycoef.size()) { | ~~~~~~^~~~~~~~~~~~~~~ main.cpp:30:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 30 | for(int i = 0; i < mycoef.size(); i++) { | ~~^~~~~~~~~~~~~~~