Compilare: main.cpp: In function 'int main()': main.cpp:33:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 33 | for(int i = 0; i < perechi_input.size(); i++) { | ~~^~~~~~~~~~~~~~~~~~~~~~ main.cpp:42:12: warning: format '%d' expects argument of type 'int', but argument 2 has type 'std::vector<std::pair<int, long long int> >::size_type' {aka 'long unsigned int'} [-Wformat=] 42 | printf("%d\n", perechi_output.size()); | ~^ ~~~~~~~~~~~~~~~~~~~~~ | | | | int std::vector<std::pair<int, long long int> >::size_type {aka long unsigned int} | %ld