Compilare: user.cpp: In function ‘int cmp(const cerc&, const cerc&)’: user.cpp:17:64: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses] return a.tangenta < b.tangenta || a.tangenta == b.tangenta && a.x < b.x; ^ user.cpp: In function ‘void debug()’: user.cpp:68:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 0; i < drepte.size(); i++) ^ user.cpp:70:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (j = 0; j < drepte[i].size(); j++) ^ user.cpp: In function ‘int main()’: user.cpp:106:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 0; i < drepte.size(); i++) ^ user.cpp:110:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 0; i < drepte.size(); i++) ^