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

---
 .../sliding_window_sum_3220.cpp                    | 25 ++++++++++++++++++++++
 1 file changed, 25 insertions(+)
 create mode 100644 11_sliding_window_problems/sliding_window_sum_3220.cpp

(limited to '11_sliding_window_problems/sliding_window_sum_3220.cpp')

diff --git a/11_sliding_window_problems/sliding_window_sum_3220.cpp b/11_sliding_window_problems/sliding_window_sum_3220.cpp
new file mode 100644
index 0000000..9096b75
--- /dev/null
+++ b/11_sliding_window_problems/sliding_window_sum_3220.cpp
@@ -0,0 +1,25 @@
+#include <iostream>
+#include <vector>
+
+int main() {
+	size_t n, k;
+	long long x, a, b, c, sum{0}, sol{0};
+	std::cin >> n >> k >> x >> a >> b >> c;
+
+	std::vector<long long> v(k);
+	for (size_t i = 0; i < k; i++) {
+		sum += x;
+		v[i] = x;
+		x = (a*x + b) % c;
+	}
+
+	sol = sum;
+	for (size_t i = 0; i < n-k; i++) {
+		sum -= v[i%k];
+		v[i%k] = (a*v[(i-1+k)%k] + b) % c;
+		sum += v[i%k];
+		sol ^= sum;
+	}
+
+	std::cout << sol << "\n";
+}
-- 
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