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数组下标是变量的时候,都判断一下好了

Posted by hawk at 2005-05-28 23:00:10 on Problem 2236
In Reply To:找不出任何可能RE的地方了,大牛帮忙啊~ Posted by:realmajia at 2005-05-28 22:51:25
> var
>   s:array[1..1001] of boolean;
>   w:array[1..1001,1..2] of longint;
>   map:array[1..1001,1..1001] of boolean;
>   i,j,k,n,a,b,d:longint;
>   t,last:char;
> begin
>   readln(n,d);
>   for i:=1 to n do readln(w[i,1],w[i,2]);
>   while not seekeof do
>     begin
>       read(t);
>       while t=' ' do read(t);
>       if t='O' then
>         begin
>           readln(a);
>           if not s[a] then
>             begin
>               s[a]:=true;
>               for i:=1 to n do
>                 if sqrt(sqr(w[i,1]-w[a,1])+sqr(w[i,2]-w[a,2]))<=d then
>                   begin
>                     map[a,i]:=true;
>                     map[j,a]:=true;
>                   end;
>             end;
>         end
>                else
>         begin
>           readln(a,b);
>           if last<>t then
>             begin
>               for k:=1 to n do
>                 if s[k] then
>                   for i:=1 to n do
>                     if s[i] then
>                       if map[i,k] then
>                         for j:=1 to n do
>                           if s[j] then
>                             if map[k,j] then
>                               begin
>                                 map[i,j]:=true;
>                                 map[j,i]:=true;
>                               end;
>             end;
>           if map[a,b] then writeln('SUCCESS')
>                       else writeln('FAIL');
>         end;
>       last:=t;
>     end;
> end. 

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