Compilare: user.cpp: In function ‘int main()’: user.cpp:26:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0;i<v.size();i++) ^ user.cpp:33:49: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (c[imax-1]==c[imax]&&imax<=v.size()&&imax-1>=0) ^ user.cpp:44:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0;i<c.size();i++) ^ user.cpp:10:25: warning: unused variable ‘ok’ [-Wunused-variable] int p,N,k=-1,ac,i,x,ok,j,nr,imax,maxi; ^