foo.cc: In function 'int main()':
foo.cc:59:19: warning: format '%d' expects argument of type 'int', but argument 2 has type 'll {aka long long int}' [-Wformat=]
    printf("%d\n",i);
                   ^
foo.cc:44:7: warning: unused variable 'j' [-Wunused-variable]
  ll i,j,m;
       ^
foo.cc:44:9: warning: unused variable 'm' [-Wunused-variable]
  ll i,j,m;
         ^

自豪的采用HydroJudge(https://github.com/hydro-dev/Hydro)进行评测。