Compilare: main.cpp: In function 'int main()': main.cpp:33:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 33 | for (int j = 0; j < a.size(); ++j) { | ~~^~~~~~~~~~ main.cpp:35:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 35 | while (j + 1 < a.size() && a[j] == a[j + 1]) { | ~~~~~~^~~~~~~~~~