foo.cc: In function 'int main()':
foo.cc:7:10: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
  if(a>=60&&b>=60||a<60&&b<60) cout<<0;
     ~~~~~^~~~~~~

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