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답안 #655441

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
655441 2022-11-04T11:36:16 Z piOOE 3단 점프 (JOI19_jumps) C++17
46 / 100
 1123 ms 62432 KB 
#include <bits/stdc++.h>

using namespace std;

constexpr int inf = 1e9 + 7;

vector<int> t, tag;
int sz = 1;

void pull(int x) {
    t[x] = max(t[x << 1], t[x << 1 | 1]) + tag[x];
}

void init(int n, vector<int> a) {
    sz = 1 << (__lg(n) + bool(n & (n - 1)));
    t.assign(sz << 1, {}), tag.assign(sz << 1, {});
    for (int i = 0; i < n; ++i) {
        t[i + sz] = a[i];
    }
    for (int i = sz - 1; i > 0; --i) {
        pull(i);
    }
}

void push(int x) {
    for (int k : {x << 1, x << 1 | 1}) {
        tag[k] += tag[x];
        t[k] += tag[x];
    }
    tag[x] = 0;
}

void rangeAdd(int l, int r, int val, int x = 1, int lx = 0, int rx = sz) {
    if (l >= rx || lx >= r) return;
    if (l <= lx && rx <= r) {
        tag[x] += val;
        t[x] += val;
        return;
    }
    int mid = (lx + rx) >> 1;
    rangeAdd(l, r, val, x << 1, lx, mid), rangeAdd(l, r, val, x << 1 | 1, mid, rx);
    pull(x);
}

int rangeQuery(int l, int r, int x = 1, int lx = 0, int rx = sz) {
    if (l >= rx || lx >= r) return -inf;
    if (l <= lx && rx <= r) return t[x];
    int mid = (lx + rx) >> 1;
    return max(rangeQuery(l, r, x << 1, lx, mid), rangeQuery(l, r, x << 1 | 1, mid, rx)) + tag[x];
}

int main() {
    ios::sync_with_stdio(false);
    cin.tie(nullptr);

    int n;
    cin >> n;

    vector<int> a(n);
    for (int i = 0; i < n; ++i) {
        cin >> a[i];
    }

    vector<array<int, 3>> events;

    auto relax = [&](int i, int j) {
        int r = j + (j - i);
        if (r < n) {
            events.push_back({i, j, -1});
        }
    };

    vector<int> stk;
    for (int i = 0; i < n; ++i) {
        while (!stk.empty() && a[stk.back()] <= a[i]) {
            relax(stk.back(), i);
            stk.pop_back();
        }
        if (!stk.empty()) {
            relax(stk.back(), i);
        }
        stk.push_back(i);
    }

    int q;
    cin >> q;

    for (int i = 0; i < q; ++i) {
        int l, r;
        cin >> l >> r;
        events.push_back({l - 1, r, i});
    }

    vector<int> ans(q);

    sort(events.begin(), events.end(), [&](array<int, 3> x, array<int, 3> y) {
        return x[0] != y[0] ? x[0] > y[0] : x[2] < y[2];
    });

    init(n, a);

    set<array<int, 3>> st;

    for (auto [i, j, tp]: events) {
        if (tp > -1) {
            ans[tp] = rangeQuery(i, j);
        } else {
            int k = j + (j - i);
            int sum = a[i] + a[j];

            auto it = st.lower_bound({k + 1, -1, -1});
            if (it != st.begin() && (*prev(it))[2] >= sum) {
                continue;
            }
            int r = n;
            while (true) {
                it = st.lower_bound({k, -1, -1});
                if (it == st.end()) {
                    r = n;
                    break;
                }
                auto [x, y, s] = *it;
                if (s > sum) {
                    r = (*it)[0];
                    break;
                }
                rangeAdd(x, y, -s);
                st.erase(it);
            }
            if (it != st.begin()) {
                auto [x, y, s] = *prev(it);
                assert(x < k);
                assert(y >= k);
                assert(s < sum);
                st.erase(prev(it));
                rangeAdd(k, y, -s);
                st.insert({x, k, s});
            }
            rangeAdd(k, r, sum);
            st.insert({k, r, sum});
//            for (auto [l, r, k]: st) {
//                cout << l << " " << r << "  " << k << endl;
//            }
//            for (int i = 0; i < n; ++i) {
//                cout << rangeQuery(i, i + 1) - a[i] << " ";
//            }
//            cout << endl;
//            cout << endl;
        }
    }

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

Subtask #1
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 1 ms 316 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 1 ms 212 KB Output is correct

Subtask #2
14.0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 1 ms 316 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 275 ms 14408 KB Output is correct
12 Correct 279 ms 13940 KB Output is correct
13 Correct 259 ms 13684 KB Output is correct
14 Correct 274 ms 13736 KB Output is correct
15 Correct 270 ms 13876 KB Output is correct
16 Correct 263 ms 13008 KB Output is correct
17 Correct 294 ms 14588 KB Output is correct
18 Correct 293 ms 14612 KB Output is correct
19 Correct 299 ms 15208 KB Output is correct

Subtask #3
27.0 / 27.0

# 결과 실행 시간 메모리 Grader output
1 Correct 249 ms 10960 KB Output is correct
2 Correct 184 ms 20316 KB Output is correct
3 Correct 160 ms 9628 KB Output is correct
4 Correct 268 ms 10948 KB Output is correct
5 Correct 258 ms 10932 KB Output is correct
6 Correct 245 ms 10928 KB Output is correct
7 Correct 246 ms 11180 KB Output is correct
8 Correct 244 ms 11192 KB Output is correct
9 Correct 271 ms 11184 KB Output is correct

Subtask #4
0 / 54.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 1 ms 316 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 275 ms 14408 KB Output is correct
12 Correct 279 ms 13940 KB Output is correct
13 Correct 259 ms 13684 KB Output is correct
14 Correct 274 ms 13736 KB Output is correct
15 Correct 270 ms 13876 KB Output is correct
16 Correct 263 ms 13008 KB Output is correct
17 Correct 294 ms 14588 KB Output is correct
18 Correct 293 ms 14612 KB Output is correct
19 Correct 299 ms 15208 KB Output is correct
20 Correct 249 ms 10960 KB Output is correct
21 Correct 184 ms 20316 KB Output is correct
22 Correct 160 ms 9628 KB Output is correct
23 Correct 268 ms 10948 KB Output is correct
24 Correct 258 ms 10932 KB Output is correct
25 Correct 245 ms 10928 KB Output is correct
26 Correct 246 ms 11180 KB Output is correct
27 Correct 244 ms 11192 KB Output is correct
28 Correct 271 ms 11184 KB Output is correct
29 Correct 1091 ms 38936 KB Output is correct
30 Correct 875 ms 62432 KB Output is correct
31 Correct 802 ms 34992 KB Output is correct
32 Correct 1087 ms 39036 KB Output is correct
33 Correct 1123 ms 38988 KB Output is correct
34 Correct 1044 ms 38288 KB Output is correct
35 Correct 1068 ms 37524 KB Output is correct
36 Correct 1054 ms 37600 KB Output is correct
37 Correct 1052 ms 38176 KB Output is correct
38 Correct 934 ms 38380 KB Output is correct
39 Correct 911 ms 38352 KB Output is correct
40 Correct 961 ms 36640 KB Output is correct
41 Correct 923 ms 36372 KB Output is correct
42 Correct 893 ms 36372 KB Output is correct
43 Correct 939 ms 37272 KB Output is correct
44 Incorrect 968 ms 38296 KB Output isn't correct
45 Halted 0 ms 0 KB -