/in/foo.cc: In function 'int main()':
/in/foo.cc:20:6: warning: suggest explicit braces to avoid ambiguous 'else' [-Wdangling-else]
    if(i>0)
      ^
/in/foo.cc:25:6: warning: suggest explicit braces to avoid ambiguous 'else' [-Wdangling-else]
    if(j>1)
      ^