Compilare: main.cpp:4:0: warning: ignoring #pragma GCC optimization [-Wunknown-pragmas] #pragma GCC optimization ("O3") main.cpp:5:0: warning: ignoring #pragma GCC optimization [-Wunknown-pragmas] #pragma GCC optimization ("unroll-loops") main.cpp: In function 'std::vector<P> create(std::vector<P>)': main.cpp:44:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 1; i < points.size(); ++i) { ~~^~~~~~~~~~~~~~~ main.cpp: In function 'int32_t main()': main.cpp:83:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < upper.size(); i++) { ~~^~~~~~~~~~~~~~ main.cpp:86:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < bottom.size(); i++) { ~~^~~~~~~~~~~~~~~