From 96254947699986c59f0dc63d69fd4b76bd3ed43e Mon Sep 17 00:00:00 2001
From: Sebastiano Tronto <sebastiano@tronto.net>
Date: Mon, 6 Jul 2026 19:08:08 +0200
Subject: Initial commit

---
 01_introductory_problems/two_sets_1092.cpp | 53 ++++++++++++++++++++++++++++++
 1 file changed, 53 insertions(+)
 create mode 100644 01_introductory_problems/two_sets_1092.cpp

(limited to '01_introductory_problems/two_sets_1092.cpp')

diff --git a/01_introductory_problems/two_sets_1092.cpp b/01_introductory_problems/two_sets_1092.cpp
new file mode 100644
index 0000000..4314654
--- /dev/null
+++ b/01_introductory_problems/two_sets_1092.cpp
@@ -0,0 +1,53 @@
+#include <iostream>
+#include <vector>
+
+void printarr(const std::vector<int>& a) {
+	std::cout << a.size() << std::endl;
+	for (auto x : a)
+		std::cout << x << " ";
+	std::cout << std::endl;
+}
+
+int main() {
+	int n;
+	std::cin >> n;
+
+	switch (n % 4) {
+	case 1:
+	case 2:
+		std::cout << "NO\n";
+		break;
+	case 0:
+		std::cout << "YES\n";
+		{
+			std::vector<int> a(n/2), b(n/2);
+			for (int i = 0; i < n/4; i++) {
+				a[2*i] = 4*i+1;
+				a[2*i+1] = 4*i+4;
+				b[2*i] = 4*i+2;
+				b[2*i+1] = 4*i+3;
+			}
+			printarr(a);
+			printarr(b);
+		}
+		break;
+	case 3:
+		std::cout << "YES\n";
+		if (n == 3) {
+			std::cout << "2\n1 2\n1\n3\n";
+		} else {
+			std::vector<int> a(n/2+1), b(n/2);
+			a[0] = 1; a[1] = 2; a[2] = 4; a[3] = 7;
+			b[0] = 3; b[1] = 5; b[2] = 6;
+			for (int i = 1; i < n/4; i++) {
+				a[2*i+2] = 4*i+4;
+				a[2*i+3] = 4*i+7;
+				b[2*i+1] = 4*i+5;
+				b[2*i+2] = 4*i+6;
+			}
+			printarr(a);
+			printarr(b);
+		}
+		break;
+	}
+}
-- 
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