Compilare: user.cpp: In function ‘void solve()’: user.cpp:64:29: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses] while(v.size() >= 2 && det(v[v.size()-2], v[v.size()-1], pct[i]) < -0.00000001 ^ user.cpp: In function ‘void afisare()’: user.cpp:77:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < v.size(); i++) ^ user.cpp: In function ‘void citire()’: user.cpp:45:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &n); ^ user.cpp:47:46: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%lf%lf", &pct[i].x, &pct[i].y); ^ user.cpp: In function ‘int main()’: user.cpp:83:44: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("infasuratoare.in", "r", stdin); ^ user.cpp:84:46: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("infasuratoare.out", "w", stdout); ^