5863: Vessels
题目描述
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 ai liters.
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.
Your task is to simulate pouring water into the vessels. To do this, you will need to handle two types of queries:
- Add xi liters of water to the pi-th vessel;
- Print the number of liters of water in the ki-th vessel.
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.
The first line contains integer n − the number of vessels (1≤n≤2·105). The second line contains n integers a1,a2,...,an − the vessels' capacities (1≤ai≤109). 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≤2·105). Each of the next m lines contains the description of one query. The query of the first type is represented as "1pixi", the query of the second type is represented as "2ki" (1≤pi≤n, 1≤xi≤109, 1≤ki≤n).
For each query, print on a single line the number of liters of water in the corresponding vessel.
2
5 10
6
1 1 4
2 1
1 2 5
1 1 4
2 1
2 2
4
5
8
3
5 10 8
6
1 1 12
2 2
1 1 6
1 3 2
2 2
2 3
7
10
5