Language: C

z[2002],*a=z,*b=z+1001,m,i,j,t;main(n){for(;scanf("%d",&n),i=n;printf("%d\n",m))
	for(memset(a,m=0,4004);i--;t=a,a=b,b=t)
			for(j=scanf(" ");j++<n;)
				m=fmax(m,b[j]=getchar()-'*'?1+fmin(fmin(b[j-1],a[j-1]),a[j]):0);
		}
	}
}

Compiler output:
main.c:1:1: warning: data definition has no type or storage class
    1 | z[2002],*a=z,*b=z+1001,m,i,j,t;main(n){for(;scanf("%d",&n),i=n;printf("%d\n",m))
      | ^
main.c:1:1: error: type defaults to 'int' in declaration of 'z' [-Wimplicit-int]
main.c:1:10: error: type defaults to 'int' in declaration of 'a' [-Wimplicit-int]
    1 | z[2002],*a=z,*b=z+1001,m,i,j,t;main(n){for(;scanf("%d",&n),i=n;printf("%d\n",m))
      |          ^
main.c:1:15: error: type defaults to 'int' in declaration of 'b' [-Wimplicit-int]
    1 | z[2002],*a=z,*b=z+1001,m,i,j,t;main(n){for(;scanf("%d",&n),i=n;printf("%d\n",m))
      |               ^
main.c:1:24: error: type defaults to 'int' in declaration of 'm' [-Wimplicit-int]
    1 | z[2002],*a=z,*b=z+1001,m,i,j,t;main(n){for(;scanf("%d",&n),i=n;printf("%d\n",m))
      |                        ^
main.c:1:26: error: type defaults to 'int' in declaration of 'i' [-Wimplicit-int]
    1 | z[2002],*a=z,*b=z+1001,m,i,j,t;main(n){for(;scanf("%d",&n),i=n;printf("%d\n",m))
      |                          ^
main.c:1:28: error: type defaults to 'int' in declaration of 'j' [-Wimplicit-int]
    1 | z[2002],*a=z,*b=z+1001,m,i,j,t;main(n){for(;scanf("%d",&n),i=n;printf("%d\n",m))
      |                            ^
main.c:1:30: error: type defaults to 'int' in declaration of 't' [-Wimplicit-int]
    1 | z[2002],*a=z,*b=z+1001,m,i,j,t;main(n){for(;scanf("%d",&n),i=n;printf("%d\n",m))
      |                              ^
main.c:1:32: error: return type defaults to 'int' [-Wimplicit-int]
    1 | z[2002],*a=z,*b=z+1001,m,i,j,t;main(n){for(;scanf("%d",&n),i=n;printf("%d\n",m))
      |                                ^~~~
main.c: In function 'main':
main.c:1:32: error: type of 'n' defaults to 'int' [-Wimplicit-int]
main.c:1:45: error: implicit declaration of function 'scanf' [-Wimplicit-function-declaration]
    1 | z[2002],*a=z,*b=z+1001,m,i,j,t;main(n){for(;scanf("%d",&n),i=n;printf("%d\n",m))
      |                                             ^~~~~
main.c:1:1: note: include '<stdio.h>' or provide a declaration of 'scanf'
  +++ |+#include <stdio.h>
    1 | z[2002],*a=z,*b=z+1001,m,i,j,t;main(n){for(;scanf("%d",&n),i=n;printf("%d\n",m))
main.c:1:45: warning: incompatible implicit declaration of built-in function 'scanf' [-Wbuiltin-declaration-mismatch]
    1 | z[2002],*a=z,*b=z+1001,m,i,j,t;main(n){for(;scanf("%d",&n),i=n;printf("%d\n",m))
      |                                             ^~~~~
main.c:1:45: note: include '<stdio.h>' or provide a declaration of 'scanf'
main.c:1:64: error: implicit declaration of function 'printf' [-Wimplicit-function-declaration]
    1 | z[2002],*a=z,*b=z+1001,m,i,j,t;main(n){for(;scanf("%d",&n),i=n;printf("%d\n",m))
      |                                                                ^~~~~~
main.c:1:64: note: include '<stdio.h>' or provide a declaration of 'printf'
main.c:1:64: warning: incompatible implicit declaration of built-in function 'printf' [-Wbuiltin-declaration-mismatch]
main.c:1:64: note: include '<stdio.h>' or provide a declaration of 'printf'
main.c:2:13: error: implicit declaration of function 'memset' [-Wimplicit-function-declaration]
    2 |         for(memset(a,m=0,4004);i--;t=a,a=b,b=t)
      |             ^~~~~~
main.c:1:1: note: include '<string.h>' or provide a declaration of 'memset'
  +++ |+#include <string.h>
    1 | z[2002],*a=z,*b=z+1001,m,i,j,t;main(n){for(;scanf("%d",&n),i=n;printf("%d\n",m))
main.c:2:13: warning: incompatible implicit declaration of built-in function 'memset' [-Wbuiltin-declaration-mismatch]
    2 |         for(memset(a,m=0,4004);i--;t=a,a=b,b=t)
      |             ^~~~~~
main.c:2:13: note: include '<string.h>' or provide a declaration of 'memset'
main.c:2:37: error: assignment to 'int' from 'int *' makes integer from pointer without a cast [-Wint-conversion]
    2 |         for(memset(a,m=0,4004);i--;t=a,a=b,b=t)
      |                                     ^
main.c:2:45: error: assignment to 'int *' from 'int' makes pointer from integer without a cast [-Wint-conversion]
    2 |         for(memset(a,m=0,4004);i--;t=a,a=b,b=t)
      |                                             ^
main.c:4:35: error: implicit declaration of function 'fmax' [-Wimplicit-function-declaration]
    4 |                                 m=fmax(m,b[j]=getchar()-'*'?1+fmin(fmin(b[j-1],a[j-1]),a[j]):0);
      |                                   ^~~~
main.c:1:1: note: include '<math.h>' or provide a declaration of 'fmax'
  +++ |+#include <math.h>
    1 | z[2002],*a=z,*b=z+1001,m,i,j,t;main(n){for(;scanf("%d",&n),i=n;printf("%d\n",m))
main.c:4:35: warning: incompatible implicit declaration of built-in function 'fmax' [-Wbuiltin-declaration-mismatch]
    4 |                                 m=fmax(m,b[j]=getchar()-'*'?1+fmin(fmin(b[j-1],a[j-1]),a[j]):0);
      |                                   ^~~~
main.c:4:35: note: include '<math.h>' or provide a declaration of 'fmax'
main.c:4:47: error: implicit declaration of function 'getchar' [-Wimplicit-function-declaration]
    4 |                                 m=fmax(m,b[j]=getchar()-'*'?1+fmin(fmin(b[j-1],a[j-1]),a[j]):0);
      |                                               ^~~~~~~
main.c:4:47: note: 'getchar' is defined in header '<stdio.h>'; this is probably fixable by adding '#include <stdio.h>'
main.c:4:63: error: implicit declaration of function 'fmin' [-Wimplicit-function-declaration]
    4 |                                 m=fmax(m,b[j]=getchar()-'*'?1+fmin(fmin(b[j-1],a[j-1]),a[j]):0);
      |                                                               ^~~~
main.c:4:63: note: include '<math.h>' or provide a declaration of 'fmin'
main.c:4:63: warning: incompatible implicit declaration of built-in function 'fmin' [-Wbuiltin-declaration-mismatch]
main.c:4:63: note: include '<math.h>' or provide a declaration of 'fmin'
main.c: At top level:
main.c:6:9: error: expected identifier or '(' before '}' token
    6 |         }
      |         ^
main.c:7:1: error: expected identifier or '(' before '}' token
    7 | }
      | ^