Compilare: main.cpp: In function 'int main()': main.cpp:19:33: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<double>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 19 | for(int j = 0;j < v.size();++j) | ~~^~~~~~~~~~ main.cpp:37:41: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<double>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 37 | for(int j = 0;j < v.size();++j) | ~~^~~~~~~~~~