From 7de121c4b4ef888a0d1990c27144a7f9dd8c5f94 Mon Sep 17 00:00:00 2001
From: Raphael McSinyx <vn.mcsinyx@gmail.com>
Date: Sun, 6 Nov 2016 11:13:14 +0700
Subject: Thêm đề HSG 12 huyện Vĩnh Tường, Vĩnh Phúc
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---
 12/TP-HN-2008/R2/DG.pas | 83 +++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 83 insertions(+)
 create mode 100755 12/TP-HN-2008/R2/DG.pas

(limited to '12/TP-HN-2008/R2/DG.pas')

diff --git a/12/TP-HN-2008/R2/DG.pas b/12/TP-HN-2008/R2/DG.pas
new file mode 100755
index 0000000..2313685
--- /dev/null
+++ b/12/TP-HN-2008/R2/DG.pas
@@ -0,0 +1,83 @@
+type bigboo = [-1..1];
+
+var
+  f : text;
+  n, i, j : byte;
+  inp : array[0..100] of PointType;
+  P, Q : PointType;
+  P_out, Q_out : boolean;
+  s : int64 = 0;
+
+function stri2(A, B, C : PointType) : int64;
+  begin
+    stri2 := (C.y - A.y) * (A.x - B.x) - (C.x - A.x) * (A.y - B.y)
+  end;
+
+function outpoly(M : PointType) : int64;
+  begin
+    outpoly := s;
+    for i := 0 to n - 1 do
+      begin
+        outpoly := outpoly - abs(stri2(M, inp[i], inp[i + 1]))
+      end
+  end;
+
+function sign(x : smallint) : bigboo;
+  begin
+    case true of
+      x > 0 : exit(1);
+      x = 0 : exit(0);
+      x < 0 : exit(-1)
+    end
+  end;
+
+function intersect(A, B : PointType) : bigboo;
+  var b00, b01 : bigboo;
+  begin
+    b00 := sign(stri2(P, Q, A));
+    b01 := sign(stri2(P, Q, A));
+    if b00 = b01 then
+      if b00 = 0 then exit(0)
+      else exit(-1);
+    b00 := sign(stri2(A, B, P));
+    b01 := sign(stri2(A, B, Q));
+    if b00 = b01 then
+      if b00 = 0 then exit(0)
+      else exit(-1);
+    exit(1)
+  end;
+
+function lensqr(A, B : PointType) : int64;
+  begin
+    exit()
+  end;
+
+procedure out(M, N : PointType);
+  begin
+    assign(f, 'DG.OUT');
+    rewrite(f);
+    write(f, trunc(sqrt(sqr(A.x - B.x) + sqr(A.y - B.y)) * 100));
+    close(f);
+    halt
+  end;
+
+begin
+  assign(f, 'DG.INP');
+  reset(f);
+  readln(f, n);
+  for i := 0 to n - 1 do
+    readln(f, inp[i].x, inp[i].y);
+  inp[n] := inp[0];
+  readln(f, P.x, P.y, Q.x, Q.y);
+  close(f);
+  for i := 1 to n - 2 do
+    s := s + abs(stri2(inp[0], inp[i], inp[i + 1]));
+  if outpoly(P) = 0 then
+    P_out := false;
+  if outpoly(Q) = 0 then
+    Q_out := false;
+  if P_out and Q_out then
+    for i := 0 to n - 1 do
+
+  out(P, Q)
+end.
-- 
cgit 1.4.1