/in/foo.c:4:5: error: variably modified 'map' at file scope
 int map[E][E];
     ^~~
/in/foo.c:4:5: error: variably modified 'map' at file scope
/in/foo.c:5:5: error: variably modified 'a' at file scope
 int a[E];
     ^
/in/foo.c:8:11: error: initializer element is not constant
 int ans = INF;
           ^~~