/in/foo.cc: In function 'int main()':
/in/foo.cc:100:27: warning: format '%ld' expects argument of type 'long int*', but argument 2 has type 'int*' [-Wformat=]
       scanf("%ld",&a[i][j]);  
                           ^
/in/foo.cc: In function 'void get_order(int)':
/in/foo.cc:57:13: warning: 'y' may be used uninitialized in this function [-Wmaybe-uninitialized]
   order[k].y=y;  
   ~~~~~~~~~~^~
/in/foo.cc:67:14: warning: 'x' may be used uninitialized in this function [-Wmaybe-uninitialized]
   check[x][y]=false;  
   ~~~~~~~~~~~^~~~~~