Compilare: main.cpp: In function 'int main()': main.cpp:32:35: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 32 | for (int k = 0; k < desc.size(); k++) | ~~^~~~~~~~~~~~~ main.cpp:44:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 44 | for (int j = 0; j < desc.size(); j++) | ~~^~~~~~~~~~~~~ main.cpp:53:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 53 | for (int j = 0; j < desc.size(); j++) | ~~^~~~~~~~~~~~~