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답안 #320381

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
320381 2020-11-08T12:37:36 Z hhhhaura 3단 점프 (JOI19_jumps) C++14
100 / 100
 1199 ms 90912 KB 
#include <bits/stdc++.h>
#pragma GCC optimize("Ofast")
#pragma loop-opt(on)

#define rep(i, a, b) for(int i = a; i <= b; i++)
#define rrep(i, a, b) for(int i = b; i >= a; i--)
#define print(x) cout << #x <<" = " << x << endl
#define pprint(x) cout << #x <<" = (" << x.first <<" , " << x.second <<")\n"
#define ceil(a, b) ((a + b - 1) / b)
#define all(x) x.begin(), x.end()

#define INF 1000000000000000000
#define MAXN 1000005
#define MOD 1000000007
#define eps (1e-9)

#define int long long int 
#define lld long double
#define pii pair<int, int>
#define random mt19937 rnd(chrono::steady_clock::now().time_since_epoch().count())
#define get(L, R) ((L + R) | (L != R))
using namespace std;
struct node {
	int A , B, C;
};
struct query {
	int L, R, id;
	bool operator<(query b) {
		return L > b.L;
	}
};
int n, q;
vector<query> qry;
vector<int> a, ans; 
vector<vector<int>> ps;
vector<node> seg;
void build() {
	stack<int> st;
	rep(i, 1, n) {
		while(st.size() && a[st.top()] <= a[i]) {
			ps[st.top()].push_back(i), st.pop();
		}
		if(st.size()) ps[st.top()].push_back(i);
		st.push(i);
	}
//	rep(i, 1, n) {
//		print(i), puts("");
//		for(auto j : ps[i]) print(j);
//		puts("\n\n");
//	}
	return;
}
void pull(int L, int R) {
	int mid = (L + R) / 2, nd = get(L, R);
	seg[nd].A = max(seg[get(L, mid)].A, seg[get(mid + 1,R)].A);
	seg[nd].C = max({seg[get(L, mid)].C, seg[get(mid + 1,R)].C, seg[nd].A + seg[nd].B });
	return;
}
void build1(int L, int R) {
	if(L == R) seg[get(L, R)].A = seg[get(L,R)].C = a[L] ;
	else {
		int mid = (L + R) / 2;
		build1(L, mid), build1(mid + 1, R);
		pull(L, R); 
	}
	return;
}
void modify(int L, int R, int l, int r, int val) {
//	pprint(pii(L,R)), print(val);
	if(l > R || r < L) return;
	if(l <= L && r >= R) {
//		print(val);
		seg[get(L, R)].B = max(seg[get(L, R)].B, val);
		seg[get(L, R)].C = max(seg[get(L,R)].C, seg[get(L, R)].B + seg[get(L,R)].A);
//		print(seg[get(L,R)].C);
	}
	else {
		int mid = (L + R) / 2;
		modify(L, mid, l, r, val), modify(mid + 1, R, l, r, val);
		pull(L,R);
	}
	return;
}
pii query(int L, int R, int l, int r) {
	if(l > R || r < L) return {0, 0};
//	pprint(pii(L,R));
	if(l <= L && r >= R) {
//		 pprint(pii(seg[get(L,R)].A, seg[get(L,R)].C));
		 return pii(seg[get(L,R)].A, seg[get(L,R)].C);
	} 
	else {
		int mid = (L + R) / 2;
		pii a = query(L, mid, l, r), b = query(mid + 1, R, l, r);
		int ans = max(max(a.first, b.first) + seg[get(L,R)].B, max(a.second, b.second));
		pii rr = pii(max(a.first, b.first), ans);
//		pprint(pii(L,R)), pprint(rr);
		return rr;
	}
}
void proc(int id) {
	for(int i : ps[id]) {
		int rr = 2 * i - id;
		if(rr > n) continue;
		modify(1, n, rr, n, a[i] + a[id]);
	}
	return;
}
void solve() {
	build(), build1(1, n), sort(all(qry));
	int cur = n;
	for(auto i : qry) {
		while(cur >= i.L) proc(cur--);
//		pprint(pii(i.L, i.R));
		pii aa = query(1, n, i.L + 2, i.R);
		ans[i.id] = aa.second;
//		puts("\n\n");
	}
	return;
}
signed main() {
	ios::sync_with_stdio(false), cin.tie(0);
	
	cin >> n, seg.resize(2 * n + 2);
	a.assign(n + 1 ,0), ps.assign(n + 1, vector<int>(0));
	rep(i, 1, n) cin >> a[i];
	
	cin >> q, qry.resize(q), ans.resize(q);
	rep(i, 0, q-1) cin >> qry[i].L >> qry[i].R, qry[i].id = i;
	
	solve();
	rep(i, 0, q-1) cout << ans[i] <<"\n";
	return 0; 
}

Compilation message

jumps.cpp:3: warning: ignoring #pragma loop  [-Wunknown-pragmas]
    3 | #pragma loop-opt(on)
      |

Subtask #1
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 1 ms 364 KB Output is correct
3 Correct 1 ms 364 KB Output is correct
4 Correct 1 ms 364 KB Output is correct
5 Correct 1 ms 364 KB Output is correct
6 Correct 1 ms 364 KB Output is correct
7 Correct 1 ms 364 KB Output is correct
8 Correct 1 ms 364 KB Output is correct
9 Correct 1 ms 364 KB Output is correct
10 Correct 1 ms 364 KB Output is correct

Subtask #2
14.0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 1 ms 364 KB Output is correct
3 Correct 1 ms 364 KB Output is correct
4 Correct 1 ms 364 KB Output is correct
5 Correct 1 ms 364 KB Output is correct
6 Correct 1 ms 364 KB Output is correct
7 Correct 1 ms 364 KB Output is correct
8 Correct 1 ms 364 KB Output is correct
9 Correct 1 ms 364 KB Output is correct
10 Correct 1 ms 364 KB Output is correct
11 Correct 367 ms 26468 KB Output is correct
12 Correct 371 ms 26196 KB Output is correct
13 Correct 370 ms 26304 KB Output is correct
14 Correct 369 ms 26308 KB Output is correct
15 Correct 381 ms 26468 KB Output is correct
16 Correct 383 ms 25828 KB Output is correct
17 Correct 370 ms 25700 KB Output is correct
18 Correct 375 ms 25700 KB Output is correct
19 Correct 384 ms 26340 KB Output is correct

Subtask #3
27.0 / 27.0

# 결과 실행 시간 메모리 Grader output
1 Correct 191 ms 25188 KB Output is correct
2 Correct 103 ms 24056 KB Output is correct
3 Correct 109 ms 25700 KB Output is correct
4 Correct 178 ms 25188 KB Output is correct
5 Correct 180 ms 25188 KB Output is correct
6 Correct 176 ms 24676 KB Output is correct
7 Correct 175 ms 24548 KB Output is correct
8 Correct 174 ms 24420 KB Output is correct
9 Correct 176 ms 24808 KB Output is correct

Subtask #4
54.0 / 54.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 1 ms 364 KB Output is correct
3 Correct 1 ms 364 KB Output is correct
4 Correct 1 ms 364 KB Output is correct
5 Correct 1 ms 364 KB Output is correct
6 Correct 1 ms 364 KB Output is correct
7 Correct 1 ms 364 KB Output is correct
8 Correct 1 ms 364 KB Output is correct
9 Correct 1 ms 364 KB Output is correct
10 Correct 1 ms 364 KB Output is correct
11 Correct 367 ms 26468 KB Output is correct
12 Correct 371 ms 26196 KB Output is correct
13 Correct 370 ms 26304 KB Output is correct
14 Correct 369 ms 26308 KB Output is correct
15 Correct 381 ms 26468 KB Output is correct
16 Correct 383 ms 25828 KB Output is correct
17 Correct 370 ms 25700 KB Output is correct
18 Correct 375 ms 25700 KB Output is correct
19 Correct 384 ms 26340 KB Output is correct
20 Correct 191 ms 25188 KB Output is correct
21 Correct 103 ms 24056 KB Output is correct
22 Correct 109 ms 25700 KB Output is correct
23 Correct 178 ms 25188 KB Output is correct
24 Correct 180 ms 25188 KB Output is correct
25 Correct 176 ms 24676 KB Output is correct
26 Correct 175 ms 24548 KB Output is correct
27 Correct 174 ms 24420 KB Output is correct
28 Correct 176 ms 24808 KB Output is correct
29 Correct 1196 ms 90084 KB Output is correct
30 Correct 991 ms 86756 KB Output is correct
31 Correct 987 ms 90912 KB Output is correct
32 Correct 1199 ms 89896 KB Output is correct
33 Correct 1193 ms 89956 KB Output is correct
34 Correct 1191 ms 87628 KB Output is correct
35 Correct 1173 ms 87456 KB Output is correct
36 Correct 1175 ms 87268 KB Output is correct
37 Correct 1191 ms 88840 KB Output is correct
38 Correct 898 ms 89956 KB Output is correct
39 Correct 906 ms 89956 KB Output is correct
40 Correct 894 ms 86756 KB Output is correct
41 Correct 910 ms 86244 KB Output is correct
42 Correct 885 ms 86120 KB Output is correct
43 Correct 891 ms 87908 KB Output is correct
44 Correct 933 ms 89868 KB Output is correct
45 Correct 939 ms 90048 KB Output is correct
46 Correct 920 ms 87012 KB Output is correct
47 Correct 923 ms 86628 KB Output is correct
48 Correct 911 ms 86376 KB Output is correct
49 Correct 947 ms 88420 KB Output is correct
50 Correct 1002 ms 90104 KB Output is correct
51 Correct 992 ms 90092 KB Output is correct
52 Correct 980 ms 87560 KB Output is correct
53 Correct 969 ms 87268 KB Output is correct
54 Correct 970 ms 87268 KB Output is correct
55 Correct 979 ms 88932 KB Output is correct