Compilare: main.cpp: In function 'int select(std::vector<int>&, int)': main.cpp:19:20: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 19 | if(left.size() == stat) { | ~~~~~~~~~~~~^~~~~~~ main.cpp:23:20: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 23 | if(left.size() > stat) { | ~~~~~~~~~~~~^~~~~~