Compilare: main.cpp: In function 'int main()': main.cpp:41:18: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 41 | if (v.size() < k) { | ~~~~~~~~~^~~ main.cpp:52:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 52 | if (last + 1 < v.size() && v[last + 1] == i) { | ~~~~~~~~~^~~~~~~~~~