/in/foo.cc: In function 'int main()':
/in/foo.cc:52:12: warning: 'ri' may be used uninitialized in this function [-Wmaybe-uninitialized]
   qwq[i]=ri-le;
          ~~^~~
/in/foo.cc:52:12: warning: 'le' may be used uninitialized in this function [-Wmaybe-uninitialized]