Compilare: user.cpp: In function ‘int main()’: user.cpp:31:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (sorted.size() < n) { ^ user.cpp:32:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < a.size(); i++) { ^ user.cpp:37:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < a.size(); i++) { ^ user.cpp:38:49: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0; j < graf[a[i]].size(); j++) { ^ user.cpp:47:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < sorted.size(); i++) { ^