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답안 #349077

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
349077 2021-01-16T14:59:23 Z Vanjanja 3단 점프 (JOI19_jumps) C++14
100 / 100
 2227 ms 65772 KB 
#include <bits/stdc++.h>
using namespace std;

const int N = 500005;
int a[N];
vector<pair<int, int>> que[N];
int resenje[N];
int b[N];
pair<int, int> c[N];
int seg[4 * N - 1][2];
int lazy[4 * N - 1];
int n;
int ind = 0;

void build(int u, int l, int r) {
    if (l == r) {
        seg[u][1] = a[l];
        return;
    }
    int mid  = (l + r) >> 1;
    build(u * 2 + 1, l, mid);
    build(u * 2 + 2, mid + 1, r);
    seg[u][1] = max(seg[u * 2 + 1][1], seg[u * 2 + 2][1]);
}

void upd(int u, int x) {
    seg[u][0] = max(seg[u][0], x + seg[u][1]);
    lazy[u] = max(lazy[u], x);
}

void shift(int u) {
    if (!lazy[u])
        return;
    upd(u * 2 + 1, lazy[u]);
    upd(u * 2 + 2, lazy[u]);
    lazy[u] = 0;
}

void update(int u, int l, int r, int L, int R, int x) {
    if (r < L || l > R)
        return;
    if (l >= L && r <= R) {
        upd(u, x);
        return;
    }
    shift(u);
    int mid = (l + r) >> 1;
    update(u * 2 + 1, l, mid, L, R, x);
    update(u * 2 + 2, mid + 1, r, L, R, x);
    seg[u][0] = max(seg[u * 2 + 1][0], seg[u * 2 + 2][0]);
}

void Update(int i) {
    if (b[i]) {
        int l = 2 * b[i] - i;
        if (l < n) {
            update(0, 0, n - 1, l, n - 1, a[i] + a[b[i]]);
        }
    }
    while (c[ind].first == i) {
        int l = 2 * c[ind].second - c[ind].first;
        if (l < n) {
            update(0, 0, n - 1, l, n - 1, a[c[ind].first] + a[c[ind].second]);
        }
        ind++;
    }
}

int out(int u, int l, int r, int L, int R) {
    if (r < L || l > R)
        return 0;
    if (l >= L && r <= R) {
        return seg[u][0];
    }
    shift(u);
    int mid = (l + r) >> 1;
    return max(out(u * 2 + 1, l, mid, L, R), out(u * 2 + 2, mid + 1, r, L, R));
}

void veca(int n) {
    stack<int> s;
    for (int i = 0; i < n; i++) {
        while (!s.empty() && a[s.top()] <= a[i]) {
            b[s.top()] = i;
            s.pop();
        }
        s.push(i);
    }
}

void veca1(int n) {
    stack<int> s;
    for (int i = n - 1; i >= 0; i--) {
        while (!s.empty() && a[s.top()] <= a[i]) {
            c[ind].first = i;
            c[ind++].second = s.top();
            s.pop();
        }
        s.push(i);
    }
    c[ind].first = -1;
    ind = 0;
}

bool cmp(pair<pair<int, int>, int> a, pair<pair<int, int>, int> b) {
    return a.first.first >= b.first.first;
}

void solve() {
    int q;
    cin >> n;
    for (int i = 0; i < n; i++)
        cin >> a[i];
    cin >> q;
    for (int i = 0; i < q; i++) {
        int l, r;
        cin >> l >> r;
        que[l - 1].push_back({r - 1, i});
    }
    veca(n);
    veca1(n);
    build(0, 0, n - 1);
    for (int i = n - 1; i >= 0; i--) {
        Update(i);
        for (auto j = que[i].begin(); j != que[i].end(); j++) {
            pair<int, int> par = *j;
            resenje[par.second] = out(0, 0, n - 1, i, par.first);
        }
    }
    for (int i = 0; i < q; i++)
        cout << resenje[i] << endl;
}

int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    solve();
    return 0;
}

Subtask #1
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 9 ms 12268 KB Output is correct
2 Correct 9 ms 12140 KB Output is correct
3 Correct 9 ms 12140 KB Output is correct
4 Correct 9 ms 12140 KB Output is correct
5 Correct 9 ms 12140 KB Output is correct
6 Correct 9 ms 12140 KB Output is correct
7 Correct 9 ms 12140 KB Output is correct
8 Correct 9 ms 12140 KB Output is correct
9 Correct 9 ms 12140 KB Output is correct
10 Correct 9 ms 12140 KB Output is correct

Subtask #2
14.0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 9 ms 12268 KB Output is correct
2 Correct 9 ms 12140 KB Output is correct
3 Correct 9 ms 12140 KB Output is correct
4 Correct 9 ms 12140 KB Output is correct
5 Correct 9 ms 12140 KB Output is correct
6 Correct 9 ms 12140 KB Output is correct
7 Correct 9 ms 12140 KB Output is correct
8 Correct 9 ms 12140 KB Output is correct
9 Correct 9 ms 12140 KB Output is correct
10 Correct 9 ms 12140 KB Output is correct
11 Correct 1411 ms 26376 KB Output is correct
12 Correct 1379 ms 26732 KB Output is correct
13 Correct 1373 ms 26476 KB Output is correct
14 Correct 1366 ms 26348 KB Output is correct
15 Correct 1433 ms 26332 KB Output is correct
16 Correct 1372 ms 25708 KB Output is correct
17 Correct 1389 ms 25836 KB Output is correct
18 Correct 1362 ms 25836 KB Output is correct
19 Correct 1381 ms 26364 KB Output is correct

Subtask #3
27.0 / 27.0

# 결과 실행 시간 메모리 Grader output
1 Correct 174 ms 21440 KB Output is correct
2 Correct 110 ms 20160 KB Output is correct
3 Correct 96 ms 21184 KB Output is correct
4 Correct 158 ms 21356 KB Output is correct
5 Correct 176 ms 21484 KB Output is correct
6 Correct 156 ms 21356 KB Output is correct
7 Correct 161 ms 21484 KB Output is correct
8 Correct 155 ms 21356 KB Output is correct
9 Correct 160 ms 21356 KB Output is correct

Subtask #4
54.0 / 54.0

# 결과 실행 시간 메모리 Grader output
1 Correct 9 ms 12268 KB Output is correct
2 Correct 9 ms 12140 KB Output is correct
3 Correct 9 ms 12140 KB Output is correct
4 Correct 9 ms 12140 KB Output is correct
5 Correct 9 ms 12140 KB Output is correct
6 Correct 9 ms 12140 KB Output is correct
7 Correct 9 ms 12140 KB Output is correct
8 Correct 9 ms 12140 KB Output is correct
9 Correct 9 ms 12140 KB Output is correct
10 Correct 9 ms 12140 KB Output is correct
11 Correct 1411 ms 26376 KB Output is correct
12 Correct 1379 ms 26732 KB Output is correct
13 Correct 1373 ms 26476 KB Output is correct
14 Correct 1366 ms 26348 KB Output is correct
15 Correct 1433 ms 26332 KB Output is correct
16 Correct 1372 ms 25708 KB Output is correct
17 Correct 1389 ms 25836 KB Output is correct
18 Correct 1362 ms 25836 KB Output is correct
19 Correct 1381 ms 26364 KB Output is correct
20 Correct 174 ms 21440 KB Output is correct
21 Correct 110 ms 20160 KB Output is correct
22 Correct 96 ms 21184 KB Output is correct
23 Correct 158 ms 21356 KB Output is correct
24 Correct 176 ms 21484 KB Output is correct
25 Correct 156 ms 21356 KB Output is correct
26 Correct 161 ms 21484 KB Output is correct
27 Correct 155 ms 21356 KB Output is correct
28 Correct 160 ms 21356 KB Output is correct
29 Correct 2227 ms 49260 KB Output is correct
30 Correct 2040 ms 56440 KB Output is correct
31 Correct 2063 ms 60072 KB Output is correct
32 Correct 2218 ms 60156 KB Output is correct
33 Correct 2221 ms 60140 KB Output is correct
34 Correct 2197 ms 57836 KB Output is correct
35 Correct 2207 ms 57580 KB Output is correct
36 Correct 2196 ms 57580 KB Output is correct
37 Correct 2212 ms 59040 KB Output is correct
38 Correct 1862 ms 65772 KB Output is correct
39 Correct 1827 ms 65772 KB Output is correct
40 Correct 1827 ms 62572 KB Output is correct
41 Correct 1806 ms 62108 KB Output is correct
42 Correct 1801 ms 61932 KB Output is correct
43 Correct 1807 ms 63724 KB Output is correct
44 Correct 1881 ms 65260 KB Output is correct
45 Correct 1891 ms 65260 KB Output is correct
46 Correct 1877 ms 62040 KB Output is correct
47 Correct 1864 ms 61688 KB Output is correct
48 Correct 1878 ms 61748 KB Output is correct
49 Correct 1868 ms 63832 KB Output is correct
50 Correct 1965 ms 63628 KB Output is correct
51 Correct 1980 ms 63416 KB Output is correct
52 Correct 1954 ms 61100 KB Output is correct
53 Correct 1931 ms 60716 KB Output is correct
54 Correct 1943 ms 60628 KB Output is correct
55 Correct 1953 ms 62240 KB Output is correct