/in/foo.cc: In function 'int main()':
/in/foo.cc:67:27: warning: format '%ld' expects argument of type 'long int*', but argument 2 has type 'int*' [-Wformat=]
       scanf("%ld",&a[i][j]);  
                           ^
/in/foo.cc:32:26: warning: 'y' may be used uninitialized in this function [-Wmaybe-uninitialized]
   order[k].x=x;order[k].y=y;  
                ~~~~~~~~~~^~
/in/foo.cc:27:15: note: 'y' was declared here
   int max=0,x,y,i,j;  
               ^
/in/foo.cc:39:14: warning: 'x' may be used uninitialized in this function [-Wmaybe-uninitialized]
   check[x][y]=false;  
   ~~~~~~~~~~~^~~~~~
/in/foo.cc:27:13: note: 'x' was declared here
   int max=0,x,y,i,j;  
             ^