A Simple Problem with Integers
| Time Limit: 5000MS |
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Memory Limit: 131072K |
| Total Submissions: 73239 |
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Accepted: 22607 |
| Case Time Limit: 2000MS |
Description
You have N integers, A1, A2, ... , AN. You need to deal with two kinds of operations. One type of operation is to add some given number to each number in a given interval. The other is to ask for the sum of numbers in a given interval.
Input
The first line contains two numbers N and Q. 1 ≤ N,Q ≤ 100000.
The second line contains N numbers, the initial values of A1, A2, ... , AN. -1000000000 ≤ Ai ≤ 1000000000.
Each of the next Q lines represents an operation.
C a b c means adding c to each of Aa, Aa+1, ... , Ab. -10000 ≤ c ≤ 10000.
Q a b means querying the sum of Aa, Aa+1, ... , Ab.
Output
You need to answer all Q commands in order. One answer in a line.
Sample Input
10 5
1 2 3 4 5 6 7 8 9 10
Q 4 4
Q 1 10
Q 2 4
C 3 6 3
Q 2 4
Sample Output
4
55
9
15
Hint
The sums may exceed the range of 32-bit integers.
Source
POJ Monthly--2007.11.25, Yang Yi
目测自己完全可以手写了~ 。题目最下面有提示 回溯加和的时候小心溢出32位整数。
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