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답안 #1097243

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
1097243 2024-10-06T14:41:39 Z LeDaiKing 3단 점프 (JOI19_jumps) C++14
100 / 100
 657 ms 72132 KB 
#include<bits/stdc++.h>
using namespace std;
#define ll long long
#define fi first
#define se second
#define pb push_back
#define ALL(n) n.begin(), n.end()
#define mask(n) (1ll << (n))
#define ck(n, k) (((n) >> (k))&1)
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());

int a[500005], nxt[500005];
vector<pair<int,int>> query[500005];
ll st[2000005], laz[2000005];
int s[5000005];
ll ans[500005];
void down(int id)
{
    ll &val = laz[id];

    if (val == 0) return;

    st[id * 2] = max(st[id * 2], s[id * 2] + val);
    laz[id * 2] = max(laz[id * 2], val);

    st[id * 2 + 1] = max(st[id * 2 + 1], s[id * 2 + 1] + val);
    laz[id * 2 + 1] = max(laz[id * 2 + 1], val);

    val = 0;
}

void update(int id, int l, int r, int u, int v, ll val)
{
    if (r < u || l > v) return;

    if (u <= l && r <= v)
    {
        st[id] = max(st[id], s[id] + val);
        laz[id] = max(laz[id], val);
        return;
    }

    int mid = (l + r)/2;
    down(id);

    update(id * 2, l, mid, u, v, val); update(id * 2 + 1, mid + 1, r, u, v, val);

    st[id] = max(st[id * 2], st[id * 2 + 1]);
        // cout << l << " " << r << " " << st[id] << endl;
}

ll get(int id, int l, int r, int u, int v)
{
    if (r < u || l > v) return 0;
    
    if (u <= l && r <= v)
    {
        return st[id]; 
    }

    int mid = (l + r)/2;
    down(id);

    return max(get(id * 2, l, mid, u, v), get(id * 2 + 1, mid + 1, r, u, v));
    // cout << "wtf " << " " << l << " " << r << endl;
}

void build(int id, int l, int r)
{
    if (l > r) return;
    
    if (l == r)
    {
        s[id] = a[l];
        return;
    }

    int mid = (l + r) / 2;

    build(id * 2, l, mid); build(id * 2 + 1, mid + 1, r);

    s[id] = max(s[id * 2], s[id * 2 + 1]);

    // cout << l << " " << r << " " << s[id] << endl;
}

void solution()
{
    int n;
    cin >> n;
    for (int i = 1; i <= n; i++)
    {
        cin >> a[i];
    }

    build(1, 1, n);
    
    int q;
    cin >> q;
    for (int i = 1; i <= q; i++)
    {
        int l, r;
        cin >> l >> r; 
        query[l].pb({r, i});
    }

    stack<int> st;
    
    for (int i = n; i; i--)
    {
        while(!st.empty() && a[st.top()] <= a[i]) st.pop();
        nxt[i] = (st.empty() ? -1 : st.top());
        // cout << nxt[i] << endl;
        st.push(i);
        if (i == n) continue;

        int j = i + 1;

        while(j != -1)
        {
            if (2 * j - i <= n)
            {
                update(1, 1, n, 2 * j - i, n, a[i] + a[j]);
            //  cout << i <<  " " << j << endl;
            }
            if (a[j] >= a[i]) break;
            j = nxt[j];
            
        }

        for (auto v : query[i])
        {
            // cout << i << " " << v.fi << endl;
            ans[v.se] = get(1, 1, n, i, v.fi);
        }
    }


    for (int i = 1; i <= q; i++) cout << ans[i] << "\n";


}

int main()
{  
    //freopen("test.inp", "r", stdin);
    //freopen("test.out", "w", stdout);
    ios_base::sync_with_stdio(0);
    cin.tie(0); cout.tie(0);

    solution();
}

Subtask #1
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 5 ms 12376 KB Output is correct
2 Correct 5 ms 12120 KB Output is correct
3 Correct 6 ms 12124 KB Output is correct
4 Correct 5 ms 12124 KB Output is correct
5 Correct 6 ms 12124 KB Output is correct
6 Correct 5 ms 12212 KB Output is correct
7 Correct 6 ms 12124 KB Output is correct
8 Correct 5 ms 12124 KB Output is correct
9 Correct 5 ms 12220 KB Output is correct
10 Correct 5 ms 12124 KB Output is correct

Subtask #2
14.0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 5 ms 12376 KB Output is correct
2 Correct 5 ms 12120 KB Output is correct
3 Correct 6 ms 12124 KB Output is correct
4 Correct 5 ms 12124 KB Output is correct
5 Correct 6 ms 12124 KB Output is correct
6 Correct 5 ms 12212 KB Output is correct
7 Correct 6 ms 12124 KB Output is correct
8 Correct 5 ms 12124 KB Output is correct
9 Correct 5 ms 12220 KB Output is correct
10 Correct 5 ms 12124 KB Output is correct
11 Correct 193 ms 33128 KB Output is correct
12 Correct 196 ms 32868 KB Output is correct
13 Correct 191 ms 32912 KB Output is correct
14 Correct 208 ms 33108 KB Output is correct
15 Correct 205 ms 33108 KB Output is correct
16 Correct 211 ms 32340 KB Output is correct
17 Correct 193 ms 32340 KB Output is correct
18 Correct 192 ms 32336 KB Output is correct
19 Correct 206 ms 32904 KB Output is correct

Subtask #3
27.0 / 27.0

# 결과 실행 시간 메모리 Grader output
1 Correct 95 ms 25684 KB Output is correct
2 Correct 58 ms 26448 KB Output is correct
3 Correct 60 ms 25680 KB Output is correct
4 Correct 96 ms 25680 KB Output is correct
5 Correct 94 ms 25784 KB Output is correct
6 Correct 91 ms 24912 KB Output is correct
7 Correct 99 ms 24912 KB Output is correct
8 Correct 91 ms 24876 KB Output is correct
9 Correct 91 ms 25268 KB Output is correct

Subtask #4
54.0 / 54.0

# 결과 실행 시간 메모리 Grader output
1 Correct 5 ms 12376 KB Output is correct
2 Correct 5 ms 12120 KB Output is correct
3 Correct 6 ms 12124 KB Output is correct
4 Correct 5 ms 12124 KB Output is correct
5 Correct 6 ms 12124 KB Output is correct
6 Correct 5 ms 12212 KB Output is correct
7 Correct 6 ms 12124 KB Output is correct
8 Correct 5 ms 12124 KB Output is correct
9 Correct 5 ms 12220 KB Output is correct
10 Correct 5 ms 12124 KB Output is correct
11 Correct 193 ms 33128 KB Output is correct
12 Correct 196 ms 32868 KB Output is correct
13 Correct 191 ms 32912 KB Output is correct
14 Correct 208 ms 33108 KB Output is correct
15 Correct 205 ms 33108 KB Output is correct
16 Correct 211 ms 32340 KB Output is correct
17 Correct 193 ms 32340 KB Output is correct
18 Correct 192 ms 32336 KB Output is correct
19 Correct 206 ms 32904 KB Output is correct
20 Correct 95 ms 25684 KB Output is correct
21 Correct 58 ms 26448 KB Output is correct
22 Correct 60 ms 25680 KB Output is correct
23 Correct 96 ms 25680 KB Output is correct
24 Correct 94 ms 25784 KB Output is correct
25 Correct 91 ms 24912 KB Output is correct
26 Correct 99 ms 24912 KB Output is correct
27 Correct 91 ms 24876 KB Output is correct
28 Correct 91 ms 25268 KB Output is correct
29 Correct 657 ms 66388 KB Output is correct
30 Correct 563 ms 68232 KB Output is correct
31 Correct 542 ms 66164 KB Output is correct
32 Correct 629 ms 66384 KB Output is correct
33 Correct 641 ms 66228 KB Output is correct
34 Correct 645 ms 63968 KB Output is correct
35 Correct 653 ms 63868 KB Output is correct
36 Correct 650 ms 63764 KB Output is correct
37 Correct 645 ms 65168 KB Output is correct
38 Correct 461 ms 72132 KB Output is correct
39 Correct 467 ms 72080 KB Output is correct
40 Correct 456 ms 68600 KB Output is correct
41 Correct 449 ms 68184 KB Output is correct
42 Correct 442 ms 68176 KB Output is correct
43 Correct 468 ms 69804 KB Output is correct
44 Correct 500 ms 71504 KB Output is correct
45 Correct 492 ms 71448 KB Output is correct
46 Correct 474 ms 68176 KB Output is correct
47 Correct 498 ms 67888 KB Output is correct
48 Correct 484 ms 67920 KB Output is correct
49 Correct 479 ms 69972 KB Output is correct
50 Correct 542 ms 69560 KB Output is correct
51 Correct 554 ms 69456 KB Output is correct
52 Correct 545 ms 67120 KB Output is correct
53 Correct 548 ms 66800 KB Output is correct
54 Correct 528 ms 66740 KB Output is correct
55 Correct 558 ms 68500 KB Output is correct