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답안 #716514

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
716514 2023-03-30T08:34:50 Z ooo 3단 점프 (JOI19_jumps) C++14
100 / 100
 942 ms 95896 KB 
#include <bits/stdc++.h>
using namespace std;

const int nu = 5e5+5;
int n, query, a[nu], x[nu], y[nu];
int  lon[nu], ans[nu];
vector<int> q[nu], be[nu];
stack<int> st1, st2;
int lazy[nu*4], it[nu*4], ma[nu*4];
void build(int id, int l, int r)
{
    if(l == r) ma[id] = a[l];
    else
    {
        int mid = (l+r)/2;
        build(id*2, l, mid);
        build(id*2+1, mid+1, r);
        ma[id] = max(ma[id*2], ma[id*2+1]);
    }
}
void update(int id, int l, int r, int u, int v, int val)
{
    if(v < l || u > r) return ;
    else if(u <= l && r <= v)
    {
        it[id] = max(it[id], val+ma[id]);
        lazy[id] = max(lazy[id], val);
    }
    else
    {
        int mid = (l+r)/2;
        it[id*2] = max(it[id*2], lazy[id]+ma[id*2]); lazy[id*2] = max(lazy[id*2], lazy[id]);
        it[id*2+1] = max(it[id*2+1], lazy[id]+ma[id*2+1]); lazy[id*2+1] = max(lazy[id*2+1], lazy[id]);
        lazy[id] = -1e9;

        update(id*2, l, mid, u, v, val);
        update(id*2+1, mid+1, r, u, v, val);
        it[id] = max(it[id*2], it[id*2+1]);
    }
}
int getmax(int id, int l, int r, int u, int v)
{
    if(v < l || u > r) return -1e9;
    else if(u <= l && r <= v) return it[id];
    else
    {
        int mid = (l+r)/2;
        it[id*2] = max(it[id*2], lazy[id]+ma[id*2]); lazy[id*2] = max(lazy[id*2], lazy[id]);
        it[id*2+1] = max(it[id*2+1], lazy[id]+ma[id*2+1]); lazy[id*2+1] = max(lazy[id*2+1], lazy[id]);
        lazy[id] = -1e9;

        return max(getmax(id*2, l, mid, u, v), getmax(id*2+1, mid+1, r, u, v));
    }
}
int main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0); cout.tie(0);
    cin >> n;
    for(int i = 1; i <= n; ++i) cin >> a[i];
    cin >> query;
    for(int i = 1; i <= query; ++i)
    {
        cin >> x[i] >> y[i];
        q[x[i]].push_back(i);
    }

    st1.push(n+1); st2.push(0);
    for(int i = n; i > 0; --i)
    {
        while(int(st1.size()) > 1 && a[st1.top()] < a[i]) st1.pop();
        //while(int(st2.size()) > 1 && a[st2.top()] > a[i]) st2.pop();
        //be[i] = st2.top();
        lon[i] = st1.top();
        //st2.push(i);
        st1.push(i);
    }

    for(int i = 1; i <= n; ++i)
    {
        while(int(st2.size()) > 1 && a[st2.top()] < a[i]) st2.pop();
        be[st2.top()].push_back(i);
        st2.push(i);
    }
    build(1, 1, n);
    for(int i = 1; i <= 4*n; ++i) it[i] = lazy[i] = -1e9;

    for(int i = n; i > 0; --i)
    {
        int aa = i; int b;
        int c = 2*b-aa;
        for(int j = 0; j < int(be[i].size()); ++j)
        {
            int qq = be[i][j];
            if(qq <= n && 2*qq-i <= n) update(1, 1, n, 2*qq-i, n, a[i]+a[qq]);
        }
       // if(be[i] <= n && c <= n) update(1, 1, n, c, n, a[i]+a[be[i]]), cout << c << ' ' << n << ' ' <<  a[i]+a[be[i]] << ' ' <<  i << '\n';
        b = lon[i]; c = 2*b-aa;
        if(lon[i] <= n && c <= n) update(1, 1, n, c, n, a[i]+a[lon[i]]);

        for(int j = 0; j < int(q[i].size()); ++j)
        {
            int p = q[i][j];
            ans[p] = getmax(1, 1, n, x[p], y[p]);
        }
    }
    for(int i = 1; i <= query; ++i) cout << ans[i] << '\n';
    return 0;
}

Subtask #1
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 13 ms 23828 KB Output is correct
2 Correct 13 ms 23832 KB Output is correct
3 Correct 12 ms 23800 KB Output is correct
4 Correct 16 ms 23892 KB Output is correct
5 Correct 12 ms 23780 KB Output is correct
6 Correct 12 ms 23836 KB Output is correct
7 Correct 12 ms 23764 KB Output is correct
8 Correct 17 ms 23764 KB Output is correct
9 Correct 15 ms 23892 KB Output is correct
10 Correct 14 ms 23828 KB Output is correct

Subtask #2
14.0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 13 ms 23828 KB Output is correct
2 Correct 13 ms 23832 KB Output is correct
3 Correct 12 ms 23800 KB Output is correct
4 Correct 16 ms 23892 KB Output is correct
5 Correct 12 ms 23780 KB Output is correct
6 Correct 12 ms 23836 KB Output is correct
7 Correct 12 ms 23764 KB Output is correct
8 Correct 17 ms 23764 KB Output is correct
9 Correct 15 ms 23892 KB Output is correct
10 Correct 14 ms 23828 KB Output is correct
11 Correct 282 ms 43152 KB Output is correct
12 Correct 376 ms 43188 KB Output is correct
13 Correct 293 ms 43196 KB Output is correct
14 Correct 327 ms 43232 KB Output is correct
15 Correct 293 ms 43220 KB Output is correct
16 Correct 291 ms 42596 KB Output is correct
17 Correct 426 ms 42572 KB Output is correct
18 Correct 277 ms 42496 KB Output is correct
19 Correct 275 ms 43104 KB Output is correct

Subtask #3
27.0 / 27.0

# 결과 실행 시간 메모리 Grader output
1 Correct 138 ms 38716 KB Output is correct
2 Correct 89 ms 37116 KB Output is correct
3 Correct 101 ms 42540 KB Output is correct
4 Correct 148 ms 38604 KB Output is correct
5 Correct 184 ms 38724 KB Output is correct
6 Correct 137 ms 37964 KB Output is correct
7 Correct 137 ms 37964 KB Output is correct
8 Correct 133 ms 37952 KB Output is correct
9 Correct 140 ms 38292 KB Output is correct

Subtask #4
54.0 / 54.0

# 결과 실행 시간 메모리 Grader output
1 Correct 13 ms 23828 KB Output is correct
2 Correct 13 ms 23832 KB Output is correct
3 Correct 12 ms 23800 KB Output is correct
4 Correct 16 ms 23892 KB Output is correct
5 Correct 12 ms 23780 KB Output is correct
6 Correct 12 ms 23836 KB Output is correct
7 Correct 12 ms 23764 KB Output is correct
8 Correct 17 ms 23764 KB Output is correct
9 Correct 15 ms 23892 KB Output is correct
10 Correct 14 ms 23828 KB Output is correct
11 Correct 282 ms 43152 KB Output is correct
12 Correct 376 ms 43188 KB Output is correct
13 Correct 293 ms 43196 KB Output is correct
14 Correct 327 ms 43232 KB Output is correct
15 Correct 293 ms 43220 KB Output is correct
16 Correct 291 ms 42596 KB Output is correct
17 Correct 426 ms 42572 KB Output is correct
18 Correct 277 ms 42496 KB Output is correct
19 Correct 275 ms 43104 KB Output is correct
20 Correct 138 ms 38716 KB Output is correct
21 Correct 89 ms 37116 KB Output is correct
22 Correct 101 ms 42540 KB Output is correct
23 Correct 148 ms 38604 KB Output is correct
24 Correct 184 ms 38724 KB Output is correct
25 Correct 137 ms 37964 KB Output is correct
26 Correct 137 ms 37964 KB Output is correct
27 Correct 133 ms 37952 KB Output is correct
28 Correct 140 ms 38292 KB Output is correct
29 Correct 942 ms 86332 KB Output is correct
30 Correct 766 ms 82348 KB Output is correct
31 Correct 820 ms 95896 KB Output is correct
32 Correct 901 ms 86396 KB Output is correct
33 Correct 941 ms 86444 KB Output is correct
34 Correct 895 ms 84132 KB Output is correct
35 Correct 911 ms 83848 KB Output is correct
36 Correct 900 ms 83752 KB Output is correct
37 Correct 866 ms 85216 KB Output is correct
38 Correct 597 ms 93056 KB Output is correct
39 Correct 601 ms 93124 KB Output is correct
40 Correct 581 ms 89728 KB Output is correct
41 Correct 589 ms 89184 KB Output is correct
42 Correct 584 ms 89324 KB Output is correct
43 Correct 592 ms 91012 KB Output is correct
44 Correct 662 ms 92372 KB Output is correct
45 Correct 631 ms 92448 KB Output is correct
46 Correct 624 ms 89272 KB Output is correct
47 Correct 621 ms 88840 KB Output is correct
48 Correct 622 ms 88784 KB Output is correct
49 Correct 648 ms 90848 KB Output is correct
50 Correct 710 ms 90288 KB Output is correct
51 Correct 712 ms 90160 KB Output is correct
52 Correct 693 ms 87628 KB Output is correct
53 Correct 705 ms 87368 KB Output is correct
54 Correct 741 ms 87364 KB Output is correct
55 Correct 730 ms 89008 KB Output is correct