/in/foo.cc: In function 'int main()':
/in/foo.cc:4:28: warning: unused variable 'now_index' [-Wunused-variable]
     int n,m,z[3],c[3],v[3],now_index=0,sum=0,index,i,j,b[101],zz[101],k,h_v,h_c,now_c,last_c;
                            ^~~~~~~~~
/in/foo.cc:4:40: warning: unused variable 'sum' [-Wunused-variable]
     int n,m,z[3],c[3],v[3],now_index=0,sum=0,index,i,j,b[101],zz[101],k,h_v,h_c,now_c,last_c;
                                        ^~~
/in/foo.cc:4:46: warning: unused variable 'index' [-Wunused-variable]
     int n,m,z[3],c[3],v[3],now_index=0,sum=0,index,i,j,b[101],zz[101],k,h_v,h_c,now_c,last_c;
                                              ^~~~~