Compilare: user.cpp: In function ‘int main()’: user.cpp:29:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < still.size(); i ++) { ^ user.cpp:34:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < L[ies].size(); i ++) { ^ user.cpp:42:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < ans.size(); i ++) g << ans[i] << " "; ^