foo.cc: In function 'void ssgs(int*, int)':
foo.cc:35:8: warning: ignoring return value of 'int system(const char*)', declared with attribute warn_unused_result [-Wunused-result]
  system("pause");
  ~~~~~~^~~~~~~~~
foo.cc:12:5: warning: 'j' may be used uninitialized in this function [-Wmaybe-uninitialized]
    j++;
    ~^~

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