Compilare: main.cpp: In function 'int main()': main.cpp:23:14: warning: comparison of integer expressions of different signedness: 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 23 | if(v.size() == n / 2) | ~~~~~~~~~^~~~~~~~ main.cpp:24:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 24 | for(int i = 0;i < v.size();++i) | ~~^~~~~~~~~~