Compilare: main.cpp: In function 'std::vector<std::pair<long double, long double> > ConvexHull(std::vector<std::pair<long double, long double> >)': main.cpp:55:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 1; i < points.size(); ++i) { ~~^~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:64:15: warning: 'indRight' may be used uninitialized in this function [-Wmaybe-uninitialized] return (i + 1) % N; ~~~^~~~ main.cpp:105:26: note: 'indRight' was declared here int indMid, indLeft, indRight; ^~~~~~~~ main.cpp:64:15: warning: 'indLeft' may be used uninitialized in this function [-Wmaybe-uninitialized] return (i + 1) % N; ~~~^~~~ main.cpp:105:17: note: 'indLeft' was declared here int indMid, indLeft, indRight; ^~~~~~~ main.cpp:64:15: warning: 'indMid' may be used uninitialized in this function [-Wmaybe-uninitialized] return (i + 1) % N; ~~~^~~~ main.cpp:105:9: note: 'indMid' was declared here int indMid, indLeft, indRight; ^~~~~~