/in/foo.c: In function 'main':
/in/foo.c:4:42: warning: unused variable 't' [-Wunused-variable]
     int a[1000][500],x,y,i,k,count=0,j,u,t;
                                          ^
/in/foo.c:4:38: warning: unused variable 'j' [-Wunused-variable]
     int a[1000][500],x,y,i,k,count=0,j,u,t;
                                      ^