Compilare: main.cpp: In function 'void radix(int*, int)': main.cpp:21:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 21 | for (int k = 0; k < buckets[j].size(); ++k) { | ~~^~~~~~~~~~~~~~~~~~~ main.cpp:34:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 34 | for (int k = 0; k < buckets[j].size(); ++k) { | ~~^~~~~~~~~~~~~~~~~~~