Compilare: main.cpp: In function 'void reduce(std::vector<int>&)': main.cpp:60:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 60 | for(int i = 0; i < v.size(); i ++) | ~~^~~~~~~~~~ main.cpp:63:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 63 | while(i < v.size() - 1 && v[i] == v[i + 1]) | ~~^~~~~~~~~~~~~~