oj.uz

답안 #1074797

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
1074797 2024-08-25T14:08:55 Z LOLOLO 3단 점프 (JOI19_jumps) C++17
100 / 100
 723 ms 104308 KB 
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;

#define           s     second
#define           f     first
#define           pb    push_back
#define           ep    emplace
#define           eb    emplace_back
#define           lb    lower_bound
#define           ub    upper_bound
#define       all(x)    x.begin(), x.end()
#define      rall(x)    x.rbegin(), x.rend()
#define   uniquev(v)    sort(all(v)), (v).resize(unique(all(v)) - (v).begin())
#define     mem(f,x)    memset(f , x , sizeof(f))
#define        sz(x)    (int)(x).size()
#define  __lcm(a, b)    (1ll * ((a) / __gcd((a), (b))) * (b))
#define          mxx    *max_element
#define          mnn    *min_element
#define    cntbit(x)    __builtin_popcountll(x)
#define       len(x)    (int)(x.length())

const int N = 5e5 + 10;
struct node{
    ll a = 0, b = 0;
};

ll a[N];
node seg[N * 4];
ll laz[N * 4];

void build(int id, int l, int r) {
    if (l == r) {
        seg[id].a = a[l];
        seg[id].b = a[l];
        return;
    }

    int m = (l + r) / 2;
    build(id * 2, l, m);
    build(id * 2 + 1, m + 1, r);
    seg[id].a = max(seg[id * 2].a, seg[id * 2 + 1].a);
    seg[id].b = max(seg[id * 2].b, seg[id * 2 + 1].b);
}

void push(int id) {
    ll t = laz[id];
    laz[id * 2] = max(laz[id * 2], t);
    laz[id * 2 + 1] = max(laz[id * 2 + 1], t);
    seg[id * 2].b = max(seg[id * 2].a + t, seg[id * 2].b);
    seg[id * 2 + 1].b = max(seg[id * 2 + 1].a + t,seg[id * 2 + 1].b);
}

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

    if (l >= u && r <= v) {
        laz[id] = max(laz[id], val);
        seg[id].b = max(seg[id].b, seg[id].a + val);
        return;
    }

    push(id);
    int m = (l + r) / 2;
    upd(id * 2, l, m, u, v, val);
    upd(id * 2 + 1, m + 1, r, u, v, val);
    seg[id].a = max(seg[id * 2].a, seg[id * 2 + 1].a);
    seg[id].b = max(seg[id * 2].b, seg[id * 2 + 1].b);
}

ll get(int id, int l, int r, int u, int v) {
    if (l > v || r < u)
        return 0;

    if (l >= u && r <= v)
        return seg[id].b;

    push(id);
    int m = (l + r) / 2;
    return max(get(id * 2, l, m, u, v), get(id * 2 + 1, m + 1, r, u, v)); 
}

vector <int> change[N];
vector <pair <int, int>> ask[N];
ll ans[N];

int main() {
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);

    int n;
    cin >> n;

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

    build(1, 1, n);
    stack <int> st;

    for (int i = n; i >= 1; i--) {
        while (sz(st)) {
            int t = st.top();
            change[i].pb(t);
            if (a[i] <= a[t])
                break;

            st.pop();
        }

        st.push(i);
    }

    int q;
    cin >> q;

    for (int i = 0; i < q; i++) {
        int l, r;
        cin >> l >> r;
        ask[l].pb({r, i});
    }

    for (int i = n; i >= 1; i--) {
        for (auto x : change[i]) {
            if (x * 2 - i <= n) {
                upd(1, 1, n, x * 2 - i, n, a[i] + a[x]);
            }
        }

        for (auto x : ask[i]) {
            ans[x.s] = max(ans[x.s], get(1, 1, n, i, x.f));
        }
    }

    for (int i = 0; i < q; i++) 
        cout << ans[i] << "\n";

    return 0;
}

// b - a <= c - b
// tinh so o (x, y) sao cho
// min(abs(x - x1), abs(y - y1))

Subtask #1
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 5 ms 26972 KB Output is correct
2 Correct 6 ms 26972 KB Output is correct
3 Correct 6 ms 26968 KB Output is correct
4 Correct 6 ms 26968 KB Output is correct
5 Correct 5 ms 26972 KB Output is correct
6 Correct 6 ms 27092 KB Output is correct
7 Correct 8 ms 26972 KB Output is correct
8 Correct 6 ms 26972 KB Output is correct
9 Correct 5 ms 26972 KB Output is correct
10 Correct 7 ms 27072 KB Output is correct

Subtask #2
14.0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 5 ms 26972 KB Output is correct
2 Correct 6 ms 26972 KB Output is correct
3 Correct 6 ms 26968 KB Output is correct
4 Correct 6 ms 26968 KB Output is correct
5 Correct 5 ms 26972 KB Output is correct
6 Correct 6 ms 27092 KB Output is correct
7 Correct 8 ms 26972 KB Output is correct
8 Correct 6 ms 26972 KB Output is correct
9 Correct 5 ms 26972 KB Output is correct
10 Correct 7 ms 27072 KB Output is correct
11 Correct 215 ms 46420 KB Output is correct
12 Correct 209 ms 46364 KB Output is correct
13 Correct 210 ms 46420 KB Output is correct
14 Correct 203 ms 46416 KB Output is correct
15 Correct 204 ms 46464 KB Output is correct
16 Correct 193 ms 45700 KB Output is correct
17 Correct 213 ms 45812 KB Output is correct
18 Correct 210 ms 45660 KB Output is correct
19 Correct 211 ms 46164 KB Output is correct

Subtask #3
27.0 / 27.0

# 결과 실행 시간 메모리 Grader output
1 Correct 115 ms 47696 KB Output is correct
2 Correct 74 ms 48464 KB Output is correct
3 Correct 75 ms 47440 KB Output is correct
4 Correct 121 ms 47512 KB Output is correct
5 Correct 119 ms 47956 KB Output is correct
6 Correct 114 ms 47084 KB Output is correct
7 Correct 128 ms 46928 KB Output is correct
8 Correct 120 ms 46884 KB Output is correct
9 Correct 115 ms 47304 KB Output is correct

Subtask #4
54.0 / 54.0

# 결과 실행 시간 메모리 Grader output
1 Correct 5 ms 26972 KB Output is correct
2 Correct 6 ms 26972 KB Output is correct
3 Correct 6 ms 26968 KB Output is correct
4 Correct 6 ms 26968 KB Output is correct
5 Correct 5 ms 26972 KB Output is correct
6 Correct 6 ms 27092 KB Output is correct
7 Correct 8 ms 26972 KB Output is correct
8 Correct 6 ms 26972 KB Output is correct
9 Correct 5 ms 26972 KB Output is correct
10 Correct 7 ms 27072 KB Output is correct
11 Correct 215 ms 46420 KB Output is correct
12 Correct 209 ms 46364 KB Output is correct
13 Correct 210 ms 46420 KB Output is correct
14 Correct 203 ms 46416 KB Output is correct
15 Correct 204 ms 46464 KB Output is correct
16 Correct 193 ms 45700 KB Output is correct
17 Correct 213 ms 45812 KB Output is correct
18 Correct 210 ms 45660 KB Output is correct
19 Correct 211 ms 46164 KB Output is correct
20 Correct 115 ms 47696 KB Output is correct
21 Correct 74 ms 48464 KB Output is correct
22 Correct 75 ms 47440 KB Output is correct
23 Correct 121 ms 47512 KB Output is correct
24 Correct 119 ms 47956 KB Output is correct
25 Correct 114 ms 47084 KB Output is correct
26 Correct 128 ms 46928 KB Output is correct
27 Correct 120 ms 46884 KB Output is correct
28 Correct 115 ms 47304 KB Output is correct
29 Correct 723 ms 98384 KB Output is correct
30 Correct 632 ms 99880 KB Output is correct
31 Correct 574 ms 97876 KB Output is correct
32 Correct 713 ms 98644 KB Output is correct
33 Correct 708 ms 98420 KB Output is correct
34 Correct 705 ms 96080 KB Output is correct
35 Correct 699 ms 95828 KB Output is correct
36 Correct 696 ms 95836 KB Output is correct
37 Correct 701 ms 97260 KB Output is correct
38 Correct 517 ms 104276 KB Output is correct
39 Correct 523 ms 104308 KB Output is correct
40 Correct 516 ms 100872 KB Output is correct
41 Correct 493 ms 100180 KB Output is correct
42 Correct 503 ms 100180 KB Output is correct
43 Correct 529 ms 102048 KB Output is correct
44 Correct 558 ms 103424 KB Output is correct
45 Correct 527 ms 103404 KB Output is correct
46 Correct 528 ms 100436 KB Output is correct
47 Correct 519 ms 100024 KB Output is correct
48 Correct 550 ms 99924 KB Output is correct
49 Correct 514 ms 101972 KB Output is correct
50 Correct 579 ms 101712 KB Output is correct
51 Correct 607 ms 101568 KB Output is correct
52 Correct 618 ms 99156 KB Output is correct
53 Correct 595 ms 99052 KB Output is correct
54 Correct 588 ms 98896 KB Output is correct
55 Correct 573 ms 100348 KB Output is correct