Если лень перебирать вручную, можно воспользоваться программой
var k,l,r,x,f:integer; begin f := 3001; l := 0; r := 65534; x := (l + r) div 2; k := 1; while (x <> f) and (l < r) do begin writeln(k,' ',l,' ',r,' ',x); k := k + 1; if f < x then r := x - 1 else l := x + 1; x := (l + r) div 2 end; writeln(k,' ',l,' ',r,' ',x); end.
Const n=5; var a:array[1..n,1..n] of integer; i,j,d,k,l,m:integer; begin k:=1; i:=1; j:=1; a[i,j]:=1; d:=n-1; for l:=1 to d do begin k:=k+1; j:=j+1; a[i,j]:=k; end; for m:=1 to n div 2 do begin for l:=1 to d do begin k:=k+1; i:=i+1; a[i,j]:=k; end; for l:=1 to d do begin k:=k+1; j:=j-1; a[i,j]:=k; end; d:=d-1; for l:=1 to d do begin k:=k+1; i:=i-1; a[i,j]:=k; end; for l:=1 to d do begin k:=k+1; j:=j+1; a[i,j]:=k; end; d:=d-1; end; for i:=1 to n do begin for j:=1 to n do write(a[i,j]:4); writeln; end; end.
1. 0..65534 -> 32767
2. 0..32766 -> 16383
3. 0..16382 -> 8191
4. 0..8190 -> 4095
5. 0..4094 -> 2047
6. 2048..4094 -> 3071
7. 2048..3070 -> 2559
8. 2560..3070 -> 2815
9. 2816..3070 -> 2943
10. 2944..3070 -> 3007
11. 2944..3006 -> 2975
12. 2976..3006 -> 2991
13. 2992..3006 -> 2999
14. 3000..3006 -> 3003
15. 3000..3002 -> 3001
Если лень перебирать вручную, можно воспользоваться программой
var k,l,r,x,f:integer;
begin
f := 3001;
l := 0;
r := 65534;
x := (l + r) div 2;
k := 1;
while (x <> f) and (l < r) do
begin
writeln(k,' ',l,' ',r,' ',x);
k := k + 1;
if f < x then r := x - 1
else l := x + 1;
x := (l + r) div 2
end;
writeln(k,' ',l,' ',r,' ',x);
end.
var a:array[1..n,1..n] of integer;
i,j,d,k,l,m:integer;
begin
k:=1;
i:=1; j:=1;
a[i,j]:=1;
d:=n-1;
for l:=1 to d do
begin k:=k+1; j:=j+1; a[i,j]:=k; end;
for m:=1 to n div 2 do
begin
for l:=1 to d do
begin k:=k+1; i:=i+1; a[i,j]:=k; end;
for l:=1 to d do
begin k:=k+1; j:=j-1; a[i,j]:=k; end;
d:=d-1;
for l:=1 to d do
begin k:=k+1; i:=i-1; a[i,j]:=k; end;
for l:=1 to d do
begin k:=k+1; j:=j+1; a[i,j]:=k; end;
d:=d-1;
end;
for i:=1 to n do
begin
for j:=1 to n do write(a[i,j]:4);
writeln;
end;
end.
Результат:
1 2 3 4 5
16 17 18 19 6
15 24 25 20 7
14 23 22 21 8
13 12 11 10 9