/in/foo.cc: In function 'int main()':
/in/foo.cc:29:9: warning: 'k' may be used uninitialized in this function [-Wmaybe-uninitialized]
  qt[k]++;
         ^
/in/foo.cc:23:22: note: 'k' was declared here
  int res=-2147483647,k;
                      ^
/in/foo.cc:29:9: warning: 'k' may be used uninitialized in this function [-Wmaybe-uninitialized]
  qt[k]++;
         ^
/in/foo.cc:23:22: note: 'k' was declared here
  int res=-2147483647,k;
                      ^