Compilare: main.cpp: In function 'Poly cutPoly(Poly, HalfPlane)': main.cpp:45:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < v.size(); ++i) { ~~^~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:101:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0 ;i < p1.size(); ++i) { ~~^~~~~~~~~~~ main.cpp:60:32: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("arie.in", "r", stdin); ^ main.cpp:61:34: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("arie.out", "w", stdout); ^