From 9535c6bd478f8c4cf1bfc964a696642a42a42a58 Mon Sep 17 00:00:00 2001
From: songyc macbook <gitea@gitea>
Date: Thu, 23 Apr 2026 21:02:15 +0900
Subject: [PATCH] baekjoon 20260423

---
 code_study/Baekjoon/c/2263.c        | 35 +++++++++++++++++++++++++++++
 code_study/Baekjoon/python/15740.py |  1 +
 2 files changed, 36 insertions(+)
 create mode 100644 code_study/Baekjoon/c/2263.c
 create mode 100644 code_study/Baekjoon/python/15740.py

diff --git a/code_study/Baekjoon/c/2263.c b/code_study/Baekjoon/c/2263.c
new file mode 100644
index 0000000..37f89a6
--- /dev/null
+++ b/code_study/Baekjoon/c/2263.c
@@ -0,0 +1,35 @@
+#include <stdio.h>
+
+int N, res_idx = 0;
+int inOrderIdx[100001];
+int inOrder[100000];
+int postOrder[100000];
+int preOrder[100000];
+
+void find(int in_start, int in_end, int post_start, int post_end) {
+    if(in_start > in_end || post_start > post_end) return;
+
+    int root = postOrder[post_end];
+    int root_idx = inOrderIdx[root];
+    int left_size = root_idx - in_start;
+
+    preOrder[res_idx++] = root;
+    find(in_start, root_idx - 1, post_start, post_start + left_size - 1);
+    find(root_idx + 1, in_end, post_start + left_size, post_end - 1);
+}
+
+int main() {
+    scanf("%d",&N);
+
+    for(int i=0; i<N; i++) {
+        scanf("%d",&inOrder[i]);
+        inOrderIdx[inOrder[i]] = i;
+    }
+
+    for(int i=0; i<N; i++) scanf("%d",&postOrder[i]);
+    find(0, N-1, 0, N-1);
+
+    for(int i=0; i<N; i++) printf("%d ",preOrder[i]);
+    return 0;
+
+}
\ No newline at end of file
diff --git a/code_study/Baekjoon/python/15740.py b/code_study/Baekjoon/python/15740.py
new file mode 100644
index 0000000..ccb694d
--- /dev/null
+++ b/code_study/Baekjoon/python/15740.py
@@ -0,0 +1 @@
+print(sum(map(int, input().split())))
\ No newline at end of file