diff --git a/BZOJ/3613/3613.cpp b/BZOJ/3613/3613.cpp
new file mode 100644
index 00000000..314909bb
--- /dev/null
+++ b/BZOJ/3613/3613.cpp
@@ -0,0 +1,58 @@
+#include <iostream>
+#include <algorithm>
+
+using std::cin;
+using std::cout;
+const char endl = '\n';
+
+const int N = 5e6 + 5;
+
+int n, s_a, s_b, s_c, s_d, a[N], b[N], mod, ans;
+
+inline int f(int x) {
+    return (static_cast<long long>(s_a) % mod * x % mod * x % mod * x % mod
+            + static_cast<long long>(s_b) % mod * x % mod * x % mod
+            + static_cast<long long>(s_c) % mod * x % mod
+            + s_d)
+         % mod;
+}
+
+bool check(int x) {
+    std::copy_n(a + 1, n, b + 1);
+
+    for (int i = 1; i <= n; i++) {
+        b[i] = std::max(b[i - 1], b[i] - x);
+
+        if (std::abs(a[i] - b[i]) > x) return false;
+    }
+
+    return true;
+}
+
+int main() {
+    std::ios::sync_with_stdio(false);
+    cin.tie(nullptr);
+
+    cin >> n >> s_a >> s_b >> s_c >> s_d >> a[1] >> mod;
+
+    for (int i = 2; i <= n; i++) {
+        a[i] = (f(a[i - 1]) + f(a[i - 2])) % mod;
+    }
+
+    int l = 0, r = mod;
+
+    while (l <= r) {
+        int mid = l + r >> 1;
+
+        if (check(mid)) {
+            ans = mid;
+            r = mid - 1;
+        } else {
+            l = mid + 1;
+        }
+    }
+
+    cout << ans << endl;
+
+    return 0;
+}
diff --git a/BZOJ/3613/data/1.in b/BZOJ/3613/data/1.in
new file mode 100644
index 00000000..af183b48
--- /dev/null
+++ b/BZOJ/3613/data/1.in
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
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diff --git a/BZOJ/3613/data/1.out b/BZOJ/3613/data/1.out
new file mode 100644
index 00000000..60699984
--- /dev/null
+++ b/BZOJ/3613/data/1.out
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diff --git a/BZOJ/3613/data/10.in b/BZOJ/3613/data/10.in
new file mode 100644
index 00000000..dda64d5f
--- /dev/null
+++ b/BZOJ/3613/data/10.in
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new file mode 100644
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--- /dev/null
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diff --git a/BZOJ/3613/data/2.in b/BZOJ/3613/data/2.in
new file mode 100644
index 00000000..2230fd12
--- /dev/null
+++ b/BZOJ/3613/data/2.in
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diff --git a/BZOJ/3613/data/2.out b/BZOJ/3613/data/2.out
new file mode 100644
index 00000000..b4baac6e
--- /dev/null
+++ b/BZOJ/3613/data/2.out
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new file mode 100644
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--- /dev/null
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new file mode 100644
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--- /dev/null
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new file mode 100644
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--- /dev/null
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new file mode 100644
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--- /dev/null
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new file mode 100644
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new file mode 100644
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new file mode 100644
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new file mode 100644
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new file mode 100644
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new file mode 100644
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