a526. D. Fence - 高中生程式解題系統

內容

John Doe has a crooked fence, consisting of n rectangular planks, lined up from the left to the right: the plank that goes i-th (1 ≤ i ≤ n)(from left to right) has width 1 and height h_i. We will assume that the plank that goes i-th (1 ≤ i ≤ n) (from left to right) has index i.

A piece of the fence from l to r (1 ≤ l ≤ r ≤ n) is a sequence of planks of wood with indices from l to r inclusive, that is, planks with indicesl, l + 1, ..., r. The width of the piece of the fence from l to r is value r - l + 1.

Two pieces of the fence from l₁ to r₁ and from l₂ to r₂ are called matching, if the following conditions hold:

the pieces do not intersect, that is, there isn't a single plank, such that it occurs in both pieces of the fence;
the pieces are of the same width;
for all i (0 ≤ i ≤ r₁ - l₁) the following condition holds: h_l₁ + i + h_l₂ + i = h_l₁ + h_l₂.

John chose a few pieces of the fence and now wants to know how many distinct matching pieces are for each of them. Two pieces of the fence are distinct if there is a plank, which belongs to one of them and does not belong to the other one.

輸入說明

The first line contains integer n (1 ≤ n ≤ 10⁵) — the number of wood planks in the fence. The second line contains n space-separated integers h₁, h₂, ..., h_n (1 ≤ h_i ≤ 10⁹) — the heights of fence planks.

The third line contains integer q (1 ≤ q ≤ 10⁵) — the number of queries. Next q lines contain two space-separated integers l_i and r_i (1 ≤ l_i ≤ r_i ≤ n) — the boundaries of the i-th piece of the fence.

輸出說明

For each query on a single line print a single integer — the number of pieces of the fence that match the given one. Print the answers to the queries in the order, in which the queries are given in the input.

範例輸入 #1

10
1 2 2 1 100 99 99 100 100 100
6
1 4
1 2
3 4
1 5
9 10
10 10

範例輸出 #1

測資資訊：

記憶體限制： 512 MB

提示：

string suffix structures

標籤:

出處:

Codeforces 232D [管理者： liouzhou_101 (王启圣) ]

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