oj.uz

답안 #201466

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
201466 2020-02-10T16:20:27 Z maruii 3단 점프 (JOI19_jumps) C++14
100 / 100
 993 ms 88056 KB 
#include <bits/stdc++.h>
using namespace std;
using pii = pair<int, int>;
#define ff first
#define ss second

int A[500005], N, Q, stk[500005], stn;
const int SIZE = 1 << 19;
struct ST {
	struct Node {
		unsigned a, b, v;
	} X[2 * SIZE];
	void init(int nn, int s, int e) {
		if (s == e) {
			X[nn].a = A[s];
			return;
		}
		int m = s + e >> 1;
		init(nn << 1, s, m);
		init(nn << 1 | 1, m + 1, e);
		X[nn].a = max(X[nn << 1].a, X[nn << 1 | 1].a);
	}
	void busy(int nn) {
		if (X[nn << 1].b < X[nn].b) {
			X[nn << 1].b = X[nn].b;
			X[nn << 1].v = max(X[nn << 1].v, X[nn << 1].a + X[nn].b);
		}
		if (X[nn << 1 | 1].b < X[nn].b) {
			X[nn << 1 | 1].b = X[nn].b;
			X[nn << 1 | 1].v = max(X[nn << 1 | 1].v, X[nn << 1 | 1].a + X[nn].b);
		}
	}
	void update(int nn, int ns, int ne, int s, int e, unsigned v) {
		if (ns > e || ne < s) return;
		if (s <= ns && ne <= e) {
			if (X[nn].b < v) {
				X[nn].b = v;
				X[nn].v = max(X[nn].v, X[nn].a + v);
			}
			return;
		}
		int m = ns + ne >> 1;
		busy(nn);
		update(nn << 1, ns, m, s, e, v);
		update(nn << 1 | 1, m + 1, ne, s, e, v);
		X[nn].v = max(X[nn << 1].v, X[nn << 1 | 1].v);
	}
	unsigned query(int nn, int ns, int ne, int s, int e) {
		if (ns > e || ne < s) return 0;
		if (s <= ns && ne <= e) return X[nn].v;
		int m = ns + ne >> 1;
		busy(nn);
		return max(query(nn << 1, ns, m, s, e), query(nn << 1 | 1, m + 1, ne, s, e));
	}
} seg;
vector<pair<int, int>> qry[500005];
vector<int> can[500005];

int main() {
	ios_base::sync_with_stdio(0), cin.tie(0);
	cin >> N;
	for (int i = 1; i <= N; ++i) cin >> A[i];
	seg.init(1, 1, N);
	for (int i = 1; i <= N; ++i) {
		while (stn && A[stk[stn - 1]] < A[i]) {
			--stn;
			can[stk[stn]].push_back(i);
		}
		if (stn) can[stk[stn - 1]].push_back(i);
		if (stn && A[i] == A[stk[stn - 1]]) stn--;
		stk[stn++] = i;
	}
	cin >> Q;
	vector<unsigned> ans(Q);
	for (int i = 0; i < Q; ++i) {
		int x, y; cin >> x >> y;
		qry[x].emplace_back(y, i);
	}
	for (int i = N; i; --i) {
		for (auto j : can[i]) seg.update(1, 1, N, j + j - i, N, A[i] + A[j]);
		for (auto j : qry[i]) ans[j.ss] = seg.query(1, 1, N, i, j.ff);
	}
	for (auto i : ans) printf("%u\n", i);
	return 0;
}

Compilation message

jumps.cpp: In member function 'void ST::init(int, int, int)':
jumps.cpp:18:13: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   int m = s + e >> 1;
           ~~^~~
jumps.cpp: In member function 'void ST::update(int, int, int, int, int, unsigned int)':
jumps.cpp:42:14: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   int m = ns + ne >> 1;
           ~~~^~~~
jumps.cpp: In member function 'unsigned int ST::query(int, int, int, int, int)':
jumps.cpp:51:14: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   int m = ns + ne >> 1;
           ~~~^~~~

Subtask #1
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 19 ms 23800 KB Output is correct
2 Correct 19 ms 23928 KB Output is correct
3 Correct 19 ms 23800 KB Output is correct
4 Correct 19 ms 23800 KB Output is correct
5 Correct 19 ms 23928 KB Output is correct
6 Correct 19 ms 23800 KB Output is correct
7 Correct 19 ms 23800 KB Output is correct
8 Correct 19 ms 23800 KB Output is correct
9 Correct 19 ms 23800 KB Output is correct
10 Correct 18 ms 23800 KB Output is correct

Subtask #2
14.0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 19 ms 23800 KB Output is correct
2 Correct 19 ms 23928 KB Output is correct
3 Correct 19 ms 23800 KB Output is correct
4 Correct 19 ms 23800 KB Output is correct
5 Correct 19 ms 23928 KB Output is correct
6 Correct 19 ms 23800 KB Output is correct
7 Correct 19 ms 23800 KB Output is correct
8 Correct 19 ms 23800 KB Output is correct
9 Correct 19 ms 23800 KB Output is correct
10 Correct 18 ms 23800 KB Output is correct
11 Correct 291 ms 42292 KB Output is correct
12 Correct 290 ms 42232 KB Output is correct
13 Correct 354 ms 42360 KB Output is correct
14 Correct 299 ms 42232 KB Output is correct
15 Correct 292 ms 42360 KB Output is correct
16 Correct 301 ms 41720 KB Output is correct
17 Correct 305 ms 41720 KB Output is correct
18 Correct 295 ms 41592 KB Output is correct
19 Correct 299 ms 42120 KB Output is correct

Subtask #3
27.0 / 27.0

# 결과 실행 시간 메모리 Grader output
1 Correct 141 ms 37524 KB Output is correct
2 Correct 89 ms 36984 KB Output is correct
3 Correct 96 ms 37752 KB Output is correct
4 Correct 144 ms 37240 KB Output is correct
5 Correct 164 ms 37368 KB Output is correct
6 Correct 134 ms 37240 KB Output is correct
7 Correct 133 ms 37244 KB Output is correct
8 Correct 131 ms 37240 KB Output is correct
9 Correct 141 ms 37368 KB Output is correct

Subtask #4
54.0 / 54.0

# 결과 실행 시간 메모리 Grader output
1 Correct 19 ms 23800 KB Output is correct
2 Correct 19 ms 23928 KB Output is correct
3 Correct 19 ms 23800 KB Output is correct
4 Correct 19 ms 23800 KB Output is correct
5 Correct 19 ms 23928 KB Output is correct
6 Correct 19 ms 23800 KB Output is correct
7 Correct 19 ms 23800 KB Output is correct
8 Correct 19 ms 23800 KB Output is correct
9 Correct 19 ms 23800 KB Output is correct
10 Correct 18 ms 23800 KB Output is correct
11 Correct 291 ms 42292 KB Output is correct
12 Correct 290 ms 42232 KB Output is correct
13 Correct 354 ms 42360 KB Output is correct
14 Correct 299 ms 42232 KB Output is correct
15 Correct 292 ms 42360 KB Output is correct
16 Correct 301 ms 41720 KB Output is correct
17 Correct 305 ms 41720 KB Output is correct
18 Correct 295 ms 41592 KB Output is correct
19 Correct 299 ms 42120 KB Output is correct
20 Correct 141 ms 37524 KB Output is correct
21 Correct 89 ms 36984 KB Output is correct
22 Correct 96 ms 37752 KB Output is correct
23 Correct 144 ms 37240 KB Output is correct
24 Correct 164 ms 37368 KB Output is correct
25 Correct 134 ms 37240 KB Output is correct
26 Correct 133 ms 37244 KB Output is correct
27 Correct 131 ms 37240 KB Output is correct
28 Correct 141 ms 37368 KB Output is correct
29 Correct 948 ms 82168 KB Output is correct
30 Correct 842 ms 81656 KB Output is correct
31 Correct 850 ms 83628 KB Output is correct
32 Correct 972 ms 82168 KB Output is correct
33 Correct 993 ms 82300 KB Output is correct
34 Correct 946 ms 79992 KB Output is correct
35 Correct 932 ms 79608 KB Output is correct
36 Correct 962 ms 79608 KB Output is correct
37 Correct 959 ms 81224 KB Output is correct
38 Correct 697 ms 87928 KB Output is correct
39 Correct 682 ms 88056 KB Output is correct
40 Correct 657 ms 84728 KB Output is correct
41 Correct 680 ms 84276 KB Output is correct
42 Correct 670 ms 84132 KB Output is correct
43 Correct 673 ms 85752 KB Output is correct
44 Correct 735 ms 87384 KB Output is correct
45 Correct 724 ms 87288 KB Output is correct
46 Correct 678 ms 84220 KB Output is correct
47 Correct 690 ms 83832 KB Output is correct
48 Correct 679 ms 83832 KB Output is correct
49 Correct 669 ms 85752 KB Output is correct
50 Correct 783 ms 85572 KB Output is correct
51 Correct 774 ms 85496 KB Output is correct
52 Correct 761 ms 83028 KB Output is correct
53 Correct 775 ms 82808 KB Output is correct
54 Correct 766 ms 82760 KB Output is correct
55 Correct 768 ms 84188 KB Output is correct