Compilare: main.cpp: In function 'void cc(std::vector<std::pair<int, int> >)': main.cpp:20:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 20 | for(int i = 0; i < a.size(); i++) | ~~^~~~~~~~~~ main.cpp: In function 'void afisare()': main.cpp:27:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 27 | for(int i = 1; i < v.size(); i += 2) | ~~^~~~~~~~~~ main.cpp:30:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 30 | for(int i = 1; i < v.size(); i += 2) | ~~^~~~~~~~~~