added files

record.hpp

@@ -0,0 +1,53 @@
+#pragma once
+#include <array>
+#include <iostream>
+#include <random>
+
+class Record {
+public:
+    std::array<int, 5> a;
+    int x;
+
+    int evaluate() const
+    {
+        int out = 0;
+        int x_n = 1;
+        for (int i = 0; i < 5; i++) {
+            out += a[i] * x_n;
+            x_n *= x;
+        }
+        return out;
+    }
+
+    bool operator<(const Record& other) const
+    {
+        return evaluate() < other.evaluate();
+    }
+
+    friend std::ostream& operator<<(std::ostream& os, const Record& r)
+    {
+        os << r.a[0] << ' ' << r.a[1] << ' ' << r.a[2] << ' '
+           << r.a[3] << ' ' << r.a[4] << ' ' << r.x;
+        return os;
+    }
+
+    friend std::istream& operator>>(std::istream& is, Record& r)
+    {
+        is >> r.a[0] >> r.a[1] >> r.a[2] >> r.a[3] >> r.a[4] >> r.x;
+        return is;
+    }
+
+    static Record random()
+    {
+        static std::random_device rd;
+        static std::mt19937 gen(rd());
+        static std::uniform_int_distribution<int> dist;
+
+        Record r;
+        for (int& val : r.a) {
+            val = dist(gen);
+        }
+        r.x = dist(gen);
+        return r;
+    }
+};