/in/foo.cc: In function 'int main()':
/in/foo.cc:93:54: warning: format '%d' expects argument of type 'int', but argument 2 has type 'long int' [-Wformat=]
    printf("1\n%d",(unique(lv[1]+1,lv[1]+m+1)-lv[1]-1));
                                                      ^