foo.cc: In function 'void TJ(long long int*, long long int, long long int*)':
foo.cc:42:5: warning: suggest explicit braces to avoid ambiguous 'else' [-Wdangling-else]
   if(a[i]!=a[i+1])
     ^

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