foo.cc: In function 'int main()':
foo.cc:12:5: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
     for(j=0;j<=n;j++)
     ^~~
foo.cc:15:2: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'for'
  return 0;
  ^~~~~~
foo.cc:5:9: warning: unused variable 'm' [-Wunused-variable]
     int m,n,k,j,s[100000]={0};
         ^
foo.cc:5:13: warning: unused variable 'k' [-Wunused-variable]
     int m,n,k,j,s[100000]={0};
             ^

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