/in/foo.cc: In function 'int main()':
/in/foo.cc:62:16: warning: 'y' may be used uninitialized in this function [-Wmaybe-uninitialized]
     if (a[i]!=x&&a[i]!=y&&cnt<(n/2-1))
         ~~~~~~~^~~~~~~~~
/in/foo.cc:62:5: warning: 'x' may be used uninitialized in this function [-Wmaybe-uninitialized]
     if (a[i]!=x&&a[i]!=y&&cnt<(n/2-1))
     ^~