/in/foo.cc: In function 'int main()':
/in/foo.cc:15:24: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
 #define F(i,start,end) for(R int (i)=(start);(i)<=(end);i++)
                        ^
/in/foo.cc:117:5: note: in expansion of macro 'F'
     F(i,1,n)    
     ^
/in/foo.cc:120:2: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'for'
  cnt=0;
  ^~~