제출 #747516

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
747516		baluteshih	Mizuyokan 2 (JOI23_mizuyokan2)	C++14	0 / 100	81 ms	3108 KiB

mizuyokan2

#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;
#define X first
#define Y second
#define SZ(a) ((int)a.size())
#define ALL(v) v.begin(), v.end()
#define pb push_back

const int L = 70;
int arr[250005], lft[250005], tmp[250005];

int main() {
    ios::sync_with_stdio(0), cin.tie(0);
    int n;
    cin >> n;
    for (int i = 1; i <= n; ++i)
        cin >> arr[i];
    
    auto update = [&](int i) {
        lft[i] = 0;
        ll cur = 0;
        for (int j = i; j > 0 && j > i - L; --j) {
            cur += arr[j];
            if (cur > max(arr[j - 1], arr[i + 1])) {
                lft[i] = j;
                break;
            }
        }
    };

    for (int i = 1; i <= n; ++i)
        update(i);
    int q;
    cin >> q;
    for (int i = 1; i <= q; ++i) {
        int x, y, a, b;
        cin >> x >> y >> a >> b;
        arr[x] = y;
        for (int j = max(1, x - 1); j <= n && j <= x + L; ++j)
            update(j);
        int ans = 1;

        ll cur = 0;
        for (int j = a + 1; j < b && j <= a + L; ++j) {
            tmp[j] = lft[j];
            if (cur > arr[j + 1]) lft[j] = max(lft[j], a + 1);
            cur += arr[j];
        }
        tmp[b] = lft[b], lft[b] = 0, cur = 0;
        for (int j = b; j > a && j > b - L; --j) {
            cur += arr[j];
            if (j == a + 1 || cur > arr[j - 1]) {
                lft[b] = j;
                break;
            }
        }

        pii one = pll(a - 1, -1);
        pii two = pll(a, 0);
        for (int j = a + 1; j <= b; ++j) {
            if (lft[j] - 1 > one.X) one.X = j, one.Y += 2;
            if (lft[j] - 1 > two.X) two.X = j, two.Y += 2;
            if (j == b) ans = max({ans, one.Y, two.Y});
            else ans = max({ans, one.Y + 1, two.Y + 1});
        }

        for (int j = a + 1; j <= b && j <= a + L; ++j)
            lft[j] = tmp[j];
        lft[b] = tmp[b];

        cout << ans << "\n";
    }
}

• Subtask 1: 0 / 6
• Subtask 2: 0 / 9
• Subtask 3: 0 / 13
• Subtask 4: 0 / 32
• Subtask 5: 0 / 29
• Subtask 6: 0 / 11