/in/foo.cc: In function 'int main()':
/in/foo.cc:26:3: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
   for(j=1;j<=n;++j)
   ^~~
/in/foo.cc:31:4: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'for'
    if(!flag) 
    ^~