| 2021 ICPC Asia East Continent Final |
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| Finished |
Prof. Pang has an annual leave of $$$c$$$ days and he wants to go on vacation.
Now there are $$$n$$$ days in a year. Prof. Pang can gain $$$a_i$$$ happiness if he rests on the $$$i$$$-th day. The values of happiness, $$$a_i$$$, may be negative.
Prof. Pang wants you to do $$$m$$$ operations:
That means he wants to find $$$$$$\max\left(\max_{l \leq l' \leq r' \leq r\atop r'-l'+1\leq c} ~~ \left(\sum_{i=l'} ^{r'} a_i\right), 0\right).$$$$$$
The first line contains three integers $$$n, m, c (1\leq n\leq 2\times 10^5, 1\leq m \leq 5\times 10^5, 1\leq c\leq n)$$$ indicating the number of days in a year, the number of operations, and Prof. Pang's annual leave days.
The next line contains $$$n$$$ integers $$$a_1, a_2, \dots, a_n(-10^9 \leq a_i\leq 10^9)$$$ indicating the values of happiness of every day.
The next $$$m$$$ lines are the $$$m$$$ operations in the format described above.
It is guaranteed that $$$1\leq x\leq n, -10^9\leq y\leq 10^9, 1\leq l\leq r \leq n$$$.
For each operation of the second type, print the answer.
5 6 3 0 -5 -3 8 -3 2 3 5 1 2 5 2 1 5 1 4 -3 2 3 5 2 1 5
8 10 0 5
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