/in/foo.cc: In function 'int main()':
/in/foo.cc:27:5: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
     if(s[0]=='+')++hd;while(s[hd]==48)++hd;
     ^~
/in/foo.cc:27:23: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'if'
     if(s[0]=='+')++hd;while(s[hd]==48)++hd;
                       ^~~~~