Problem F

Statement
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F. Two Subarraystime limit per test3 secondsmemory limit per test512 megabytesinputstandard inputoutputstandard outputYou are given two integer arrays $$$a$$$ and $$$b$$$, both of size $$$n$$$.Let's define the cost of the subarray $$$[l, r]$$$ as $$$a_l + a_{l + 1} + \cdots + a_{r - 1} + a_r + b_l + b_r$$$. If $$$l=r$$$, then the cost of the subarray is $$$a_l + 2 \cdot b_l$$$.You have to perform queries of three types:   "$$$1$$$ $$$p$$$ $$$x$$$" — assign $$$a_{p} := x$$$;  "$$$2$$$ $$$p$$$ $$$x$$$" — assign $$$b_{p} := x$$$;  "$$$3$$$ $$$l$$$ $$$r$$$" — find two non-empty non-overlapping subarrays within the segment $$$[l, r]$$$ with the maximum total cost and print their total cost. InputThe first line contains a single integer $$$n$$$ ($$$2 \le n \le 2 \cdot 10^5$$$).The second line contains $$$n$$$ integers $$$a_1, a_2, \dots, a_n$$$ ($$$-10^9 \le a_i \le 10^9$$$).The third line contains $$$n$$$ integers $$$b_1, b_2, \dots, b_n$$$ ($$$-10^9 \le b_i \le 10^9$$$).The fourth line contains a single integer $$$q$$$ ($$$1 \le q \le 2 \cdot 10^5$$$).The next $$$q$$$ lines contain the queries: one per line. Each query is of one of three types:   "$$$1$$$ $$$p$$$ $$$x$$$" ($$$1 \le p \le n$$$; $$$-10^9 \le x \le 10^9$$$);  "$$$2$$$ $$$p$$$ $$$x$$$" ($$$1 \le p \le n$$$; $$$-10^9 \le x \le 10^9$$$);  "$$$3$$$ $$$l$$$ $$$r$$$" ($$$1 \le l < r \le n$$$). It is guaranteed that there is at least one query of the third type.OutputFor each query of the third type, print the maximum possible total cost of two non-empty non-overlapping subarrays within the segment $$$[l, r]$$$.ExamplesInput73 -1 4 -3 2 4 00 6 1 0 -3 -2 -163 1 71 2 03 3 62 5 -31 3 23 1 5Output18
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Input102 -1 -3 -2 0 4 5 6 2 52 -4 -5 -1 6 2 5 -6 4 2103 6 71 10 -23 5 73 2 82 1 -52 7 43 1 33 3 83 2 31 4 4Output23
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-17
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-22