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code_segments/segment_340.txt

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+Imagine a game where you play as a character that has two attributes: "Strength" and "Intelligence", that are at zero level initially.
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+During the game, you'll acquire $m$ attribute points that allow you to increase your attribute levels — one point will increase one of the attributes by one level. But sometimes, you'll encounter a so-called "Attribute Checks": if your corresponding attribute is high enough, you'll pass it; otherwise, you'll fail it.
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+Spending some time, you finally prepared a list which contains records of all points you got and all checks you've met. And now you're wondering: what is the maximum number of attribute checks you can pass in a single run if you'd spend points wisely?
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+Note that you can't change the order of records.
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+The first line contains two integers $n$ and $m$ ($1 \le m \le 5000$; $m < n \le 2 \cdot 10^6$) — the number of records in the list and the total number of points you'll get during the game.
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+The second line contains $n$ integers $r_1, r_2, \dots, r_n$ ($-m \le r_i \le m$), where $r_i$ encodes the $i$-th record:
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+  * If $r_i = 0$, then the $i$-th record is an acquiring one attribute point. You can spend to level up either Strength or Intelligence;    * If $r_i > 0$, then it's an Intelligence check: if your Intelligence level is greater than or equal to $|r_i|$, you pass.    * If $r_i < 0$, then it's a Strength check: if your Strength level is greater than or equal to $|r_i|$, you pass. 
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+Additional constraint on the input: the sequence $r_1, r_2, \dots, r_n$ contains exactly $m$ elements equal to $0$.
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+Print one integer — the maximum number of checks you can pass.
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+In the first test, it's optimal to spend each point in Strength, so you'll fail $2$ Intelligence checks but pass $3$ Strength checks.
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+In the second test, you'll fail both checks, since the first point you get comes after the checks.
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+In the third test, one of the optimal strategies is:
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+  1. spend the first point on Intelligence;    2. spend the second point on Strength;    3. spend the third point on