Compilare: main.cpp: In function 'void AddPoint(PII, int)': main.cpp:76:113: warning: comparison of constant '0' with boolean expression is always false [-Wbool-compare] while (D.size() > 1 && PantaMare(v[D[D.size()-2]].first, v[D[D.size()-1]].first, v[D[D.size()-1]].first, p) < 0) ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~ main.cpp: In function 'void FindAnswer(PIII)': main.cpp:83:102: warning: comparison of constant '0' with boolean expression is always false [-Wbool-compare] while (D.size() > 1 && PantaMare(v[D[D.size()-2]].first, v[D[D.size()-1]].first, {0,0}, x.first) < 0) ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~ main.cpp: In function 'void Solve()': main.cpp:92:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < v.size(); ++ i ) { ~~^~~~~~~~~~ main.cpp:93:14: warning: variable 'p' set but not used [-Wunused-but-set-variable] PIII p = v[i]; ^