답안 #396856

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
396856	2021-04-30T19:58:05 Z	abdzag	Global Warming (CEOI18_glo)	C++17	100 / 100	1216 ms	60712 KB

glo

#include<bits/stdc++.h>

#define rep(i,a,b) for(int i=int(a);i<int(b);i++)
#define rrep(i,a,b) for(int i=int(a);i>int(b); i--);
#define all(v) v.begin(),v.end()
#define trav(a,v) for(auto&a:v)

using namespace std;
const long long inf = 1e15;
typedef long long ll;


struct MaxTree {
	typedef ll T;
	static constexpr T unit = -inf;
	vector<T> s;
	T f(T a, T b) {
		return max(a, b);
	}
	ll n;
	MaxTree(ll n = 0, T def = unit) : n(n), s(2 * n, def) {}
	void update(ll pos, T val) {
		for (s[pos += n] = val; pos /= 2;) {
			s[pos] = f(s[2 * pos], s[2 * pos + 1]);
		}
	}
	T query(ll l, ll r) {
		T a = unit, b = unit;
		if (l == r)return 0;
		for (l += n, r += n; l < r; l /= 2, r /= 2) {
			if (l % 2)a = f(a, s[l++]);
			if (r % 2) b = f(b, s[--r]);
		}
		return f(a, b);
	}
	T getVal(ll pos) {

		return s[pos + n];
	}
};
int main() {
	cin.sync_with_stdio(false);
	ll n, x;
	cin >> n >> x;
	vector<vector<ll>> before(2 * n + 1);
	vector<ll> v(n);
	rep(i, 0, n) cin >> v[i];
	ll ans = 0;
	rep(i, 0, n)v.push_back(v[i] - x);
	vector<ll> sorted = v;
	sort(all(sorted));
	map<ll, ll> maping;
	rep(i, 0, 2 * n)maping[sorted[i]] = i;
	vector<ll> lis(n);
	MaxTree tree(2 * n);
	rep(i, 0, 2 * n) {
		tree.update(i, 0);
	}
	MaxTree tree2 = tree;
	vector<ll> v2;
	rep(i, n, 2 * n) v2.push_back(v[i]);
	rep(i, 0, n) {
		lis[i] = 1 + tree.query(0, maping[v2[i]]);
		if (tree.getVal(maping[v2[i]])) before[maping[v2[i]]].push_back(tree.getVal(maping[v2[i]]));
		tree.update(maping[v2[i]], lis[i]);
	}
	rep(i, 0, n) {
		ll curval = 1 + tree2.query(maping[v[n - 1 - i]] + 1, 2 * n);
		tree2.update(maping[v[n - 1 - i]], curval);
		if (before[maping[v2[n - 1 - i]]].empty())tree.update(maping[v2[n - 1 - i]], 0);
		else {
			tree.update(maping[v2[n - 1 - i]], before[maping[v2[n - 1 - i]]].back());
			before[maping[v2[n - 1 - i]]].pop_back();
		}
		ans = max(ans, curval + tree.query(0, maping[v[n - 1 - i]]));
	}
	cout << ans << endl;
	return 0;
}

Compilation message

glo.cpp: In constructor 'MaxTree::MaxTree(ll, MaxTree::T)':
glo.cpp:20:5: warning: 'MaxTree::n' will be initialized after [-Wreorder]
   20 |  ll n;
      |     ^
glo.cpp:16:12: warning:   'std::vector<long long int> MaxTree::s' [-Wreorder]
   16 |  vector<T> s;
      |            ^
glo.cpp:21:2: warning:   when initialized here [-Wreorder]
   21 |  MaxTree(ll n = 0, T def = unit) : n(n), s(2 * n, def) {}
      |  ^~~~~~~

Subtask #1

5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	1 ms	204 KB	Output is correct
2	Correct	1 ms	312 KB	Output is correct
3	Correct	1 ms	204 KB	Output is correct
4	Correct	1 ms	204 KB	Output is correct
5	Correct	1 ms	204 KB	Output is correct
6	Correct	1 ms	204 KB	Output is correct
7	Correct	1 ms	204 KB	Output is correct
8	Correct	1 ms	316 KB	Output is correct
9	Correct	1 ms	204 KB	Output is correct
10	Correct	1 ms	204 KB	Output is correct
11	Correct	1 ms	204 KB	Output is correct

Subtask #2

10.0 / 10.0

#	결과	실행 시간	메모리	Grader output
1	Correct	1 ms	204 KB	Output is correct
2	Correct	1 ms	312 KB	Output is correct
3	Correct	1 ms	204 KB	Output is correct
4	Correct	1 ms	204 KB	Output is correct
5	Correct	1 ms	204 KB	Output is correct
6	Correct	1 ms	204 KB	Output is correct
7	Correct	1 ms	204 KB	Output is correct
8	Correct	1 ms	316 KB	Output is correct
9	Correct	1 ms	204 KB	Output is correct
10	Correct	1 ms	204 KB	Output is correct
11	Correct	1 ms	204 KB	Output is correct
12	Correct	1 ms	204 KB	Output is correct
13	Correct	1 ms	204 KB	Output is correct
14	Correct	1 ms	204 KB	Output is correct
15	Correct	1 ms	332 KB	Output is correct
16	Correct	1 ms	204 KB	Output is correct
17	Correct	1 ms	204 KB	Output is correct
18	Correct	1 ms	204 KB	Output is correct

Subtask #3

13.0 / 13.0

#	결과	실행 시간	메모리	Grader output
1	Correct	1 ms	204 KB	Output is correct
2	Correct	1 ms	312 KB	Output is correct
3	Correct	1 ms	204 KB	Output is correct
4	Correct	1 ms	204 KB	Output is correct
5	Correct	1 ms	204 KB	Output is correct
6	Correct	1 ms	204 KB	Output is correct
7	Correct	1 ms	204 KB	Output is correct
8	Correct	1 ms	316 KB	Output is correct
9	Correct	1 ms	204 KB	Output is correct
10	Correct	1 ms	204 KB	Output is correct
11	Correct	1 ms	204 KB	Output is correct
12	Correct	1 ms	204 KB	Output is correct
13	Correct	1 ms	204 KB	Output is correct
14	Correct	1 ms	204 KB	Output is correct
15	Correct	1 ms	332 KB	Output is correct
16	Correct	1 ms	204 KB	Output is correct
17	Correct	1 ms	204 KB	Output is correct
18	Correct	1 ms	204 KB	Output is correct
19	Correct	2 ms	588 KB	Output is correct
20	Correct	2 ms	588 KB	Output is correct
21	Correct	2 ms	588 KB	Output is correct
22	Correct	2 ms	460 KB	Output is correct
23	Correct	2 ms	460 KB	Output is correct
24	Correct	2 ms	460 KB	Output is correct
25	Correct	2 ms	460 KB	Output is correct
26	Correct	2 ms	460 KB	Output is correct

Subtask #4

10.0 / 10.0

#	결과	실행 시간	메모리	Grader output
1	Correct	930 ms	46324 KB	Output is correct
2	Correct	932 ms	46120 KB	Output is correct
3	Correct	944 ms	46248 KB	Output is correct
4	Correct	935 ms	46232 KB	Output is correct
5	Correct	346 ms	40076 KB	Output is correct

Subtask #5

20.0 / 20.0

#	결과	실행 시간	메모리	Grader output
1	Correct	185 ms	14868 KB	Output is correct
2	Correct	184 ms	14920 KB	Output is correct
3	Correct	185 ms	14992 KB	Output is correct
4	Correct	82 ms	11692 KB	Output is correct
5	Correct	1 ms	204 KB	Output is correct
6	Correct	105 ms	12324 KB	Output is correct
7	Correct	128 ms	14292 KB	Output is correct

Subtask #6

17.0 / 17.0

#	결과	실행 시간	메모리	Grader output
1	Correct	495 ms	29524 KB	Output is correct
2	Correct	483 ms	29524 KB	Output is correct
3	Correct	1216 ms	58748 KB	Output is correct
4	Correct	406 ms	46480 KB	Output is correct
5	Correct	223 ms	30132 KB	Output is correct
6	Correct	435 ms	57232 KB	Output is correct
7	Correct	429 ms	57780 KB	Output is correct
8	Correct	307 ms	30516 KB	Output is correct

Subtask #7

25.0 / 25.0

#	결과	실행 시간	메모리	Grader output
1	Correct	1 ms	204 KB	Output is correct
2	Correct	1 ms	312 KB	Output is correct
3	Correct	1 ms	204 KB	Output is correct
4	Correct	1 ms	204 KB	Output is correct
5	Correct	1 ms	204 KB	Output is correct
6	Correct	1 ms	204 KB	Output is correct
7	Correct	1 ms	204 KB	Output is correct
8	Correct	1 ms	316 KB	Output is correct
9	Correct	1 ms	204 KB	Output is correct
10	Correct	1 ms	204 KB	Output is correct
11	Correct	1 ms	204 KB	Output is correct
12	Correct	1 ms	204 KB	Output is correct
13	Correct	1 ms	204 KB	Output is correct
14	Correct	1 ms	204 KB	Output is correct
15	Correct	1 ms	332 KB	Output is correct
16	Correct	1 ms	204 KB	Output is correct
17	Correct	1 ms	204 KB	Output is correct
18	Correct	1 ms	204 KB	Output is correct
19	Correct	2 ms	588 KB	Output is correct
20	Correct	2 ms	588 KB	Output is correct
21	Correct	2 ms	588 KB	Output is correct
22	Correct	2 ms	460 KB	Output is correct
23	Correct	2 ms	460 KB	Output is correct
24	Correct	2 ms	460 KB	Output is correct
25	Correct	2 ms	460 KB	Output is correct
26	Correct	2 ms	460 KB	Output is correct
27	Correct	930 ms	46324 KB	Output is correct
28	Correct	932 ms	46120 KB	Output is correct
29	Correct	944 ms	46248 KB	Output is correct
30	Correct	935 ms	46232 KB	Output is correct
31	Correct	346 ms	40076 KB	Output is correct
32	Correct	185 ms	14868 KB	Output is correct
33	Correct	184 ms	14920 KB	Output is correct
34	Correct	185 ms	14992 KB	Output is correct
35	Correct	82 ms	11692 KB	Output is correct
36	Correct	1 ms	204 KB	Output is correct
37	Correct	105 ms	12324 KB	Output is correct
38	Correct	128 ms	14292 KB	Output is correct
39	Correct	495 ms	29524 KB	Output is correct
40	Correct	483 ms	29524 KB	Output is correct
41	Correct	1216 ms	58748 KB	Output is correct
42	Correct	406 ms	46480 KB	Output is correct
43	Correct	223 ms	30132 KB	Output is correct
44	Correct	435 ms	57232 KB	Output is correct
45	Correct	429 ms	57780 KB	Output is correct
46	Correct	307 ms	30516 KB	Output is correct
47	Correct	464 ms	30516 KB	Output is correct
48	Correct	463 ms	30488 KB	Output is correct
49	Correct	1118 ms	60660 KB	Output is correct
50	Correct	384 ms	47404 KB	Output is correct
51	Correct	333 ms	36168 KB	Output is correct
52	Correct	452 ms	47456 KB	Output is correct
53	Correct	457 ms	59948 KB	Output is correct
54	Correct	453 ms	60712 KB	Output is correct
55	Correct	707 ms	56488 KB	Output is correct