From b0c8afb9595d132cf348850827208364a7bd5dde Mon Sep 17 00:00:00 2001
From: songyc macbook <gitea@gitea>
Date: Mon, 2 Mar 2026 20:34:17 +0900
Subject: [PATCH] baekjoon 20260302

---
 code_study/Baekjoon/ts/17387.ts | 40 +++++++++++++++++++++++++++++++++
 1 file changed, 40 insertions(+)
 create mode 100644 code_study/Baekjoon/ts/17387.ts

diff --git a/code_study/Baekjoon/ts/17387.ts b/code_study/Baekjoon/ts/17387.ts
new file mode 100644
index 0000000..bcfc190
--- /dev/null
+++ b/code_study/Baekjoon/ts/17387.ts
@@ -0,0 +1,40 @@
+export {};
+const input = require("fs").readFileSync(0).toString().trim().split("\n");
+const [x1, y1, x2, y2]: number[] = input[0].split(" ").map(Number);
+const [x3, y3, x4, y4]: number[] = input[1].split(" ").map(Number);
+
+const compare = (A: number[], B: number[]): boolean => {
+    if(A[0] < B[0]) return true;
+    else if(A[0] === B[0]) return A[1] <= B[1];
+    
+    return false;
+}
+
+const crossProduct = (A: number[], B: number[], C: number[]): number => {
+    const op: number = (B[0] - A[0]) * (C[1] - A[1]) - (B[1] - A[1]) * (C[0] - A[0]);
+    if(op > 0) return 1;
+    else if(op < 0) return -1;
+    return 0;
+}
+
+
+let A: number[] = [x1, y1], B: number[] = [x2, y2];
+if(!compare(A, B)) [A, B] = [B, A];
+
+let C: number[] = [x3, y3], D: number[] = [x4, y4];
+if(!compare(C, D)) [C, D] = [D, C];
+
+let ans: number = 0;
+
+const crossABCD: number = crossProduct(A, B, C) * crossProduct(A, B, D);
+const crossCDAB: number = crossProduct(C, D, A) * crossProduct(C, D, B);
+
+if((crossABCD === 0 && crossCDAB === 0)) {
+    if(compare(A,D) && compare(C,B)) ans = 1;
+}
+
+else if(crossABCD <= 0 && crossCDAB <= 0) {
+    ans = 1;
+}
+
+console.log(ans);
\ No newline at end of file