Compilare: user.cpp: In function ‘int main()’: user.cpp:54:41: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0;i<comp[y].size();i++) ^ user.cpp:62:41: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0;i<comp[x].size();i++) ^ user.cpp:40:25: warning: unused variable ‘j’ [-Wunused-variable] int x,y,rad1,rad2,i,j; ^