Compilare: main.cpp: In function 'int longest(const std::vector<int>&)': main.cpp:7:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 7 | for (int i = 0; i < a.size(); i++) { | ~~^~~~~~~~~~ main.cpp:21:17: warning: 'poz' may be used uninitialized [-Wmaybe-uninitialized] 21 | return a[poz]; | ^ main.cpp:4:9: note: 'poz' was declared here 4 | int poz; | ^~~