Compilare: user.cpp: In function ‘int main()’: user.cpp:30:33: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses] if (v[0]==v[1] || v[0]!=v[1]&& v[0]!=v[2]) ^ user.cpp:46:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0;i<vs.size();i++) ^ user.cpp:58:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0;i<vs.size();i++) fout<<vs[i]<<" "; ^