oj.uz

답안 #564175

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
564175 2022-05-18T16:36:43 Z 4fecta 3단 점프 (JOI19_jumps) C++17
32 / 100
 4000 ms 11976 KB 
#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define int ll
#define ld long double
#define pii pair<int, int>
#define f first
#define s second
#define boost() cin.tie(0), cin.sync_with_stdio(0)

const int MN = 500005;

int n, q, a[MN], l, r, st[MN * 4];

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

int qry(int l, int r, int x, int y, int idx) {
    if (r < x || l > y || r < l) return -0x3f3f3f3f;
    if (r <= y && l >= x) return st[idx];
    int mid = (l + r) >> 1;
    return max(qry(l, mid, x, y, idx * 2), qry(mid + 1, r, x, y, idx * 2 + 1));
}

int twos(int j, int i, int l, int r) {
    if (j > i) swap(i, j);
    int ret = 0;
    int lo = max(l, j - (i - j));
    ret = max(ret, qry(1, n, lo, j - 1, 1) + a[j] + a[i]);
    int hi = i + (i - j);
    ret = max(ret, qry(1, n, hi, r, 1) + a[j] + a[i]);
    int mid = (j + i) / 2;
    ret = max(ret, qry(1, n, j + 1, mid, 1) + a[j] + a[i]);
    return ret;
}

int check(int i, int l, int r) {
    int ret = 0;
    for (int j = l; j <= r; j++) {
        if (j != i) ret = max(ret, twos(i, j, l, r));
    }
    return ret;
}

int32_t main() {
    boost();

    cin >> n;
    for (int i = 1; i <= n; i++) cin >> a[i];
    build(1, n, 1);
    cin >> q;
    while (q--) {
        cin >> l >> r;
        vector<pii> v;
        for (int i = l; i <= r; i++) v.push_back({a[i], i});
        sort(v.begin(), v.end(), greater<>());
        int ans = 0;
        for (int i = 0; i < min((int) v.size(), 20ll); i++) {
            ans = max(ans, check(v[i].s, l, r));
        }
        printf("%lld\n", ans);
    }

    return 0;
}

Subtask #1
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 14 ms 340 KB Output is correct
3 Correct 16 ms 348 KB Output is correct
4 Correct 14 ms 344 KB Output is correct
5 Correct 14 ms 340 KB Output is correct
6 Correct 14 ms 344 KB Output is correct
7 Correct 14 ms 340 KB Output is correct
8 Correct 13 ms 340 KB Output is correct
9 Correct 16 ms 340 KB Output is correct
10 Correct 13 ms 344 KB Output is correct

Subtask #2
0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 14 ms 340 KB Output is correct
3 Correct 16 ms 348 KB Output is correct
4 Correct 14 ms 344 KB Output is correct
5 Correct 14 ms 340 KB Output is correct
6 Correct 14 ms 344 KB Output is correct
7 Correct 14 ms 340 KB Output is correct
8 Correct 13 ms 340 KB Output is correct
9 Correct 16 ms 340 KB Output is correct
10 Correct 13 ms 344 KB Output is correct
11 Execution timed out 4074 ms 1000 KB Time limit exceeded
12 Halted 0 ms 0 KB -

Subtask #3
27.0 / 27.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1907 ms 11972 KB Output is correct
2 Correct 1691 ms 11968 KB Output is correct
3 Correct 1625 ms 11896 KB Output is correct
4 Correct 1698 ms 11972 KB Output is correct
5 Correct 1763 ms 11976 KB Output is correct
6 Correct 1840 ms 11332 KB Output is correct
7 Correct 1952 ms 11204 KB Output is correct
8 Correct 1921 ms 11204 KB Output is correct
9 Correct 2045 ms 11468 KB Output is correct

Subtask #4
0 / 54.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 14 ms 340 KB Output is correct
3 Correct 16 ms 348 KB Output is correct
4 Correct 14 ms 344 KB Output is correct
5 Correct 14 ms 340 KB Output is correct
6 Correct 14 ms 344 KB Output is correct
7 Correct 14 ms 340 KB Output is correct
8 Correct 13 ms 340 KB Output is correct
9 Correct 16 ms 340 KB Output is correct
10 Correct 13 ms 344 KB Output is correct
11 Execution timed out 4074 ms 1000 KB Time limit exceeded
12 Halted 0 ms 0 KB -