Codeforces Round 218 (Div. 2)
D
Vessels
Codeforces
1800
原题
← CE →
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There is a system of $*n*$ vessels arranged one above the other as shown in the figure below. Assume that the vessels are numbered from 1 to $*n*$, in the order from the highest to the lowest, the volume of the $*i*$-th vessel is $*a*_{*i*}$ liters.

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image

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Initially, all the vessels are empty. In some vessels water is poured. All the water that overflows from the $*i*$-th vessel goes to the $(*i* + 1)$-th one. The liquid that overflows from the $*n*$-th vessel spills on the floor.

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Your task is to simulate pouring water into the vessels. To do this, you will need to handle two types of queries:

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  1. Add $*x*_{*i*}$ liters of water to the $*p*_{*i*}$-th vessel;
  2. Print the number of liters of water in the $*k*_{*i*}$-th vessel.
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When you reply to the second request you can assume that all the water poured up to this point, has already overflown between the vessels.

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Input

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The first line contains integer $*n*$ — the number of vessels ($1 ≤ *n* ≤ 2·10^{5}$). The second line contains $*n*$ integers $*a*_{1}, *a*_{2}, ..., *a*_{*n*}$ — the vessels' capacities ($1 ≤ *a*_{*i*} ≤ 10^{9}$). The vessels' capacities do not necessarily increase from the top vessels to the bottom ones (see the second sample). The third line contains integer $*m*$ — the number of queries ($1 ≤ *m* ≤ 2·10^{5}$). Each of the next $*m*$ lines contains the description of one query. The query of the first type is represented as "$1 *p*_{*i*} *x*_{*i*}$", the query of the second type is represented as "$2 *k*_{*i*}$" ($1 ≤ *p*_{*i*} ≤ *n*$, $1 ≤ *x*_{*i*} ≤ 10^{9}$, $1 ≤ *k*_{*i*} ≤ *n*$).

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Output

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For each query, print on a single line the number of liters of water in the corresponding vessel.

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样例

Input #1
2
5 10
6
1 1 4
2 1
1 2 5
1 1 4
2 1
2 2
Output #1
4
5
8
InputCopy OutputCopy
Input #2
3
5 10 8
6
1 1 12
2 2
1 1 6
1 3 2
2 2
2 3
Output #2
7
10
5
InputCopy OutputCopy
题目信息
题号
371D
时间限制
2 s
内存限制
256 MB
标签
数据结构
并查集
模拟
树

题面与样例版权归 Codeforces 及出题人所有;中文翻译由 AI 生成(CI 管线),如有出入请以原文为准。