Compilare: main.cpp: In function 'int main()': main.cpp:70:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<coord[index].size();i++) ~^~~~~~~~~~~~~~~~~~~~ main.cpp:104:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<coord[index].size();i++) ~^~~~~~~~~~~~~~~~~~~~ main.cpp:100:9: warning: variable 'kf' set but not used [-Wunused-but-set-variable] int ki,kf; ^~