This https://codeforces.com/contest/1956/submission/256474898 solution consumes at least (2 * n + 1) * sizeof(int)
bytes, on the test #4 the memory usage must be at least 1_600_004
bytes instead of 56 KB
.
№ | Пользователь | Рейтинг |
---|---|---|
1 | tourist | 3757 |
2 | jiangly | 3647 |
3 | Benq | 3581 |
4 | orzdevinwang | 3570 |
5 | Geothermal | 3569 |
5 | cnnfls_csy | 3569 |
7 | Radewoosh | 3509 |
8 | ecnerwala | 3486 |
9 | jqdai0815 | 3474 |
10 | gyh20 | 3447 |
Страны | Города | Организации | Всё → |
№ | Пользователь | Вклад |
---|---|---|
1 | maomao90 | 171 |
2 | awoo | 165 |
3 | adamant | 164 |
4 | TheScrasse | 159 |
5 | maroonrk | 155 |
6 | nor | 154 |
7 | -is-this-fft- | 152 |
8 | Petr | 147 |
9 | orz | 146 |
10 | pajenegod | 145 |
This https://codeforces.com/contest/1956/submission/256474898 solution consumes at least (2 * n + 1) * sizeof(int)
bytes, on the test #4 the memory usage must be at least 1_600_004
bytes instead of 56 KB
.
Proof:
Осталось 11 дней до профессионального праздника шпуртивных программистов, очень надеюсь, что Миша-ибн-Расих-аль-Мирзаян приготовил какой-нибудь подарок для пользователей CF.
https://codeforces.com/contest/1846/submission/215981788
MikeMirzayanov не читает ЛС:
The code (Ruby) below is a solution for https://leetcode.com/problems/uncrossed-lines/
Note: In Ruby Array#shift is O(1)
The trick is on the lines 14-15:
def max_uncrossed_lines a, b
s = 0
while !a.empty? && a.first == b.first
a.shift
b.shift
s += 1
end
while !a.empty? && a.last == b.last
a.pop
b.pop
s += 1
end
# These two lines
c = a.to_set & b.to_set
a, b = *[a, b].map! { | v | v.filter { c === _1 } }
r0, r1 = *Array.new(2) { [0] * (b.size + 1) }
for x in a
for y, j in b.each_with_index
r1[j + 1] = (x == y) ?
1 + r0[j] :
[r0[j + 1], r1[j]].max
end
r0, r1 = r1, r0
end
s + r0.last
end
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