/in/foo.cc: In function 'int main()':
/in/foo.cc:85:15: warning: 'r' may be used uninitialized in this function [-Wmaybe-uninitialized]
         printf("%d\n", query(1, l, r, f));
         ~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~
/in/foo.cc:85:15: warning: 'l' may be used uninitialized in this function [-Wmaybe-uninitialized]
/in/foo.cc:85:15: warning: 'f' may be used uninitialized in this function [-Wmaybe-uninitialized]
/in/foo.cc:75:15: warning: 'y' may be used uninitialized in this function [-Wmaybe-uninitialized]
         Mi[i] = y;
         ~~~~~~^~~
/in/foo.cc:74:15: warning: 'x' may be used uninitialized in this function [-Wmaybe-uninitialized]
         Ma[i] = x;
         ~~~~~~^~~