Language: C

z[4000],*a=z,*b=z+2000,m,i,j,k;main(n){for(;!scanf("%d",&n)|n;m=!printf("%d\n",m))for(i=++n;i--;j=a,a=b,b=j)for(j=n;j--;k>m?m=k:0)k=b[j]=n+~i&&getchar()>45?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[4000],*a=z,*b=z+2000,m,i,j,k;main(n){for(;!scanf("%d",&n)|n;m=!printf("%d\n",m))for(i=++n;i--;j=a,a=b,b=j)for(j=n;j--;k>m?m=k:0)k=b[j]=n+~i&&getchar()>45?1+fmin(fmin(b[j+1],a[j+1]),a[j]):0);}
      | ^
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[4000],*a=z,*b=z+2000,m,i,j,k;main(n){for(;!scanf("%d",&n)|n;m=!printf("%d\n",m))for(i=++n;i--;j=a,a=b,b=j)for(j=n;j--;k>m?m=k:0)k=b[j]=n+~i&&getchar()>45?1+fmin(fmin(b[j+1],a[j+1]),a[j]):0);}
      |          ^
main.c:1:15: error: type defaults to 'int' in declaration of 'b' [-Wimplicit-int]
    1 | z[4000],*a=z,*b=z+2000,m,i,j,k;main(n){for(;!scanf("%d",&n)|n;m=!printf("%d\n",m))for(i=++n;i--;j=a,a=b,b=j)for(j=n;j--;k>m?m=k:0)k=b[j]=n+~i&&getchar()>45?1+fmin(fmin(b[j+1],a[j+1]),a[j]):0);}
      |               ^
main.c:1:24: error: type defaults to 'int' in declaration of 'm' [-Wimplicit-int]
    1 | z[4000],*a=z,*b=z+2000,m,i,j,k;main(n){for(;!scanf("%d",&n)|n;m=!printf("%d\n",m))for(i=++n;i--;j=a,a=b,b=j)for(j=n;j--;k>m?m=k:0)k=b[j]=n+~i&&getchar()>45?1+fmin(fmin(b[j+1],a[j+1]),a[j]):0);}
      |                        ^
main.c:1:26: error: type defaults to 'int' in declaration of 'i' [-Wimplicit-int]
    1 | z[4000],*a=z,*b=z+2000,m,i,j,k;main(n){for(;!scanf("%d",&n)|n;m=!printf("%d\n",m))for(i=++n;i--;j=a,a=b,b=j)for(j=n;j--;k>m?m=k:0)k=b[j]=n+~i&&getchar()>45?1+fmin(fmin(b[j+1],a[j+1]),a[j]):0);}
      |                          ^
main.c:1:28: error: type defaults to 'int' in declaration of 'j' [-Wimplicit-int]
    1 | z[4000],*a=z,*b=z+2000,m,i,j,k;main(n){for(;!scanf("%d",&n)|n;m=!printf("%d\n",m))for(i=++n;i--;j=a,a=b,b=j)for(j=n;j--;k>m?m=k:0)k=b[j]=n+~i&&getchar()>45?1+fmin(fmin(b[j+1],a[j+1]),a[j]):0);}
      |                            ^
main.c:1:30: error: type defaults to 'int' in declaration of 'k' [-Wimplicit-int]
    1 | z[4000],*a=z,*b=z+2000,m,i,j,k;main(n){for(;!scanf("%d",&n)|n;m=!printf("%d\n",m))for(i=++n;i--;j=a,a=b,b=j)for(j=n;j--;k>m?m=k:0)k=b[j]=n+~i&&getchar()>45?1+fmin(fmin(b[j+1],a[j+1]),a[j]):0);}
      |                              ^
main.c:1:32: error: return type defaults to 'int' [-Wimplicit-int]
    1 | z[4000],*a=z,*b=z+2000,m,i,j,k;main(n){for(;!scanf("%d",&n)|n;m=!printf("%d\n",m))for(i=++n;i--;j=a,a=b,b=j)for(j=n;j--;k>m?m=k:0)k=b[j]=n+~i&&getchar()>45?1+fmin(fmin(b[j+1],a[j+1]),a[j]):0);}
      |                                ^~~~
main.c: In function 'main':
main.c:1:32: error: type of 'n' defaults to 'int' [-Wimplicit-int]
main.c:1:46: error: implicit declaration of function 'scanf' [-Wimplicit-function-declaration]
    1 | z[4000],*a=z,*b=z+2000,m,i,j,k;main(n){for(;!scanf("%d",&n)|n;m=!printf("%d\n",m))for(i=++n;i--;j=a,a=b,b=j)for(j=n;j--;k>m?m=k:0)k=b[j]=n+~i&&getchar()>45?1+fmin(fmin(b[j+1],a[j+1]),a[j]):0);}
      |                                              ^~~~~
main.c:1:1: note: include '<stdio.h>' or provide a declaration of 'scanf'
  +++ |+#include <stdio.h>
    1 | z[4000],*a=z,*b=z+2000,m,i,j,k;main(n){for(;!scanf("%d",&n)|n;m=!printf("%d\n",m))for(i=++n;i--;j=a,a=b,b=j)for(j=n;j--;k>m?m=k:0)k=b[j]=n+~i&&getchar()>45?1+fmin(fmin(b[j+1],a[j+1]),a[j]):0);}
main.c:1:46: warning: incompatible implicit declaration of built-in function 'scanf' [-Wbuiltin-declaration-mismatch]
    1 | z[4000],*a=z,*b=z+2000,m,i,j,k;main(n){for(;!scanf("%d",&n)|n;m=!printf("%d\n",m))for(i=++n;i--;j=a,a=b,b=j)for(j=n;j--;k>m?m=k:0)k=b[j]=n+~i&&getchar()>45?1+fmin(fmin(b[j+1],a[j+1]),a[j]):0);}
      |                                              ^~~~~
main.c:1:46: note: include '<stdio.h>' or provide a declaration of 'scanf'
main.c:1:66: error: implicit declaration of function 'printf' [-Wimplicit-function-declaration]
    1 | z[4000],*a=z,*b=z+2000,m,i,j,k;main(n){for(;!scanf("%d",&n)|n;m=!printf("%d\n",m))for(i=++n;i--;j=a,a=b,b=j)for(j=n;j--;k>m?m=k:0)k=b[j]=n+~i&&getchar()>45?1+fmin(fmin(b[j+1],a[j+1]),a[j]):0);}
      |                                                                  ^~~~~~
main.c:1:66: note: include '<stdio.h>' or provide a declaration of 'printf'
main.c:1:66: warning: incompatible implicit declaration of built-in function 'printf' [-Wbuiltin-declaration-mismatch]
main.c:1:66: note: include '<stdio.h>' or provide a declaration of 'printf'
main.c:1:98: error: assignment to 'int' from 'int *' makes integer from pointer without a cast [-Wint-conversion]
    1 | z[4000],*a=z,*b=z+2000,m,i,j,k;main(n){for(;!scanf("%d",&n)|n;m=!printf("%d\n",m))for(i=++n;i--;j=a,a=b,b=j)for(j=n;j--;k>m?m=k:0)k=b[j]=n+~i&&getchar()>45?1+fmin(fmin(b[j+1],a[j+1]),a[j]):0);}
      |                                                                                                  ^
main.c:1:106: error: assignment to 'int *' from 'int' makes pointer from integer without a cast [-Wint-conversion]
    1 | z[4000],*a=z,*b=z+2000,m,i,j,k;main(n){for(;!scanf("%d",&n)|n;m=!printf("%d\n",m))for(i=++n;i--;j=a,a=b,b=j)for(j=n;j--;k>m?m=k:0)k=b[j]=n+~i&&getchar()>45?1+fmin(fmin(b[j+1],a[j+1]),a[j]):0);}
      |                                                                                                          ^
main.c:1:144: error: implicit declaration of function 'getchar' [-Wimplicit-function-declaration]
    1 | z[4000],*a=z,*b=z+2000,m,i,j,k;main(n){for(;!scanf("%d",&n)|n;m=!printf("%d\n",m))for(i=++n;i--;j=a,a=b,b=j)for(j=n;j--;k>m?m=k:0)k=b[j]=n+~i&&getchar()>45?1+fmin(fmin(b[j+1],a[j+1]),a[j]):0);}
      |                                                                                                                                                ^~~~~~~
main.c:1:144: note: 'getchar' is defined in header '<stdio.h>'; this is probably fixable by adding '#include <stdio.h>'
main.c:1:159: error: implicit declaration of function 'fmin' [-Wimplicit-function-declaration]
    1 | z[4000],*a=z,*b=z+2000,m,i,j,k;main(n){for(;!scanf("%d",&n)|n;m=!printf("%d\n",m))for(i=++n;i--;j=a,a=b,b=j)for(j=n;j--;k>m?m=k:0)k=b[j]=n+~i&&getchar()>45?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 'fmin'
  +++ |+#include <math.h>
    1 | z[4000],*a=z,*b=z+2000,m,i,j,k;main(n){for(;!scanf("%d",&n)|n;m=!printf("%d\n",m))for(i=++n;i--;j=a,a=b,b=j)for(j=n;j--;k>m?m=k:0)k=b[j]=n+~i&&getchar()>45?1+fmin(fmin(b[j+1],a[j+1]),a[j]):0);}
main.c:1:159: warning: incompatible implicit declaration of built-in function 'fmin' [-Wbuiltin-declaration-mismatch]
    1 | z[4000],*a=z,*b=z+2000,m,i,j,k;main(n){for(;!scanf("%d",&n)|n;m=!printf("%d\n",m))for(i=++n;i--;j=a,a=b,b=j)for(j=n;j--;k>m?m=k:0)k=b[j]=n+~i&&getchar()>45?1+fmin(fmin(b[j+1],a[j+1]),a[j]):0);}
      |                                                                                                                                                               ^~~~
main.c:1:159: note: include '<math.h>' or provide a declaration of 'fmin'
main.c:1:191: error: expected ';' before ')' token
    1 | z[4000],*a=z,*b=z+2000,m,i,j,k;main(n){for(;!scanf("%d",&n)|n;m=!printf("%d\n",m))for(i=++n;i--;j=a,a=b,b=j)for(j=n;j--;k>m?m=k:0)k=b[j]=n+~i&&getchar()>45?1+fmin(fmin(b[j+1],a[j+1]),a[j]):0);}
      |                                                                                                                                                                                               ^
      |                                                                                                                                                                                               ;
main.c:1:191: error: expected statement before ')' token