Compilare: main.cpp: In function 'int cadran(std::vector<std::pair<int, int> >)': main.cpp:13:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=1;i<v.size();i++) { ~^~~~~~~~~ main.cpp: In function 'int main()': main.cpp:46:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0;i<c2.size();i++) ~^~~~~~~~~~ main.cpp:49:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0;i<c3.size();i++) { ~^~~~~~~~~~ main.cpp:54:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0;i<c4.size();i++) ~^~~~~~~~~~