Submission #1310796

#	Time	Username	Problem	Language	Result	Execution time	Memory
1310796		aryan	Snowball (JOI21_ho_t2)	C++20	33 / 100	1455 ms	11372 KiB

Main

#include <bits/stdc++.h>
using namespace std;

using i64 = long long;

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

    int n, q;
    cin >> n >> q;

    vector<i64> a(n);
    for (int i = 0; i < n; i++) {
        cin >> a[i];
    }

    vector<i64> dist(n - 1);
    for (int i = 0; i + 1 < n; i++) {
        dist[i] = a[i + 1] - a[i];
    }

    vector<pair<i64, int>> que;
    i64 cur = 0;
    for (int i = 0; i < q; i++) {
        i64 w;
        cin >> w;
        cur += w;
        que.push_back({cur, i});
    }

    sort(que.begin(), que.end());

    vector<int> sm(q), pm(q);
    for (int i = q - 1; i >= 0; i--) {
        sm[i] = que[i].second;
        if (i + 1 < q) sm[i] = min(sm[i], sm[i + 1]);
    }
    for (int i = 0; i < q; i++) {
        pm[i] = que[i].second;
        if (i > 0) pm[i] = min(pm[i], pm[i - 1]);
    }

    vector<i64> we(n);

    for (int i = 0; i < n; i++) {

        {
            auto f = [&](i64 x, i64 d) {
                int ind = lower_bound(que.begin(), que.end(),
                                      pair<i64, int>{x, -1}) - que.begin();
                if (ind == q) return false;

                int ind2 = lower_bound(que.begin(), que.end(),
                                       pair<i64, int>{x - d, -1}) - que.begin() - 1;
                if (ind2 < 0) return true;

                return pm[ind2] > sm[ind];
            };

            i64 d = (i + 1 < n ? dist[i] : (i64)1e15);
            i64 s = 0, e = d;
            while (s < e) {
                i64 mid = (s + e + 1) / 2;
                if (f(mid, d)) s = mid;
                else e = mid - 1;
            }
            we[i] += e;
        }

        {
            auto f = [&](i64 x, i64 d) {
                int ind = upper_bound(que.begin(), que.end(),
                                      pair<i64, int>{-x, INT_MAX}) - que.begin() - 1;
                if (ind < 0) return false;

                int ind2 = upper_bound(que.begin(), que.end(),
                                       pair<i64, int>{d - x, INT_MAX}) - que.begin();
                if (ind2 == q) return true;

                return sm[ind2] > pm[ind];
            };

            i64 d = (i > 0 ? dist[i - 1] : (i64)1e15);
            i64 s = 0, e = d;
            while (s < e) {
                i64 mid = (s + e + 1) / 2;
                if (f(mid, d)) s = mid;
                else e = mid - 1;
            }
            we[i] += e;
        }
    }

    for (int i = 0; i < n; i++) {
        cout << we[i] << '\n';
    }

    return 0;
}

• Subtask 1: 33 / 33
• Subtask 2: 0 / 67