oj.uz

답안 #1060354

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
1060354 2024-08-15T13:19:27 Z iancu Sjeckanje (COCI21_sjeckanje) C++17
110 / 110
 403 ms 37000 KB 
#include <bits/stdc++.h>

using namespace std;

typedef long long ll;

constexpr int N = 2e5 + 5;

struct Nod {
    ll cap[2];
    ll dp[2][2];

    ll ans() {
        return max(max(dp[0][0], dp[0][1]), max(dp[1][0], dp[1][1]));
    }
} aint[4 * N];

int d[N];

Nod merge(const Nod& a, const Nod& b) {
    Nod c = {{a.cap[0], b.cap[1]}, {{0, 0}, {0, 0}}};

    for (int l = 0; l < 2; ++l)
        for (int r = 0; r < 2; ++r)
            for (int i = 0; i < 2; ++i)
                for (int j = 0; j < 2; ++j)
                    if (i && j) {
                        if ((a.cap[1] > 0) == (b.cap[0] > 0))
                            c.dp[l][r] = max(c.dp[l][r], a.dp[l][i] + b.dp[j][r]);
                    } else {
                        c.dp[l][r] = max(c.dp[l][r], a.dp[l][i] + b.dp[j][r]);
                    }

    return c;
}

void build(int p, int l, int r) {
    if (l == r) {
        aint[p] = {{d[l], d[r]}, {{0, 0}, {0, abs(d[r])}}};
        return;
    }

    int m = (l + r) / 2;
    build(p * 2, l, m);
    build(p * 2 + 1, m + 1, r);

    aint[p] = merge(aint[2 * p], aint[2 * p + 1]);
}

void upd(int p, int l, int r, int pos, int add) {
    if (l == r) {
        aint[p].cap[0] += add, aint[p].cap[1] += add;
        aint[p].dp[1][1] = abs(aint[p].cap[0]);
        return;
    }

    int m = (l + r) / 2;
    if (pos <= m) upd(p * 2, l, m, pos, add);
    else upd(p * 2 + 1, m + 1, r, pos, add);

    aint[p] = merge(aint[p * 2], aint[p * 2 + 1]);
}

int main() {
    iostream::sync_with_stdio(false);
    cin.tie(nullptr), cout.tie(nullptr);

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

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

    build(1, 1, n - 1);

    while (q--) {
        int l, r, add;
        cin >> l >> r >> add;
        if (l - 1 > 0)
            upd(1, 1, n - 1, l - 1, add);
        if (r < n)
            upd(1, 1, n - 1, r, -add);

        cout << aint[1].ans() << "\n";
    }
    return 0;
}

Subtask #1
15.0 / 15.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 2396 KB Output is correct
2 Correct 1 ms 2396 KB Output is correct
3 Correct 1 ms 2396 KB Output is correct
4 Correct 1 ms 2396 KB Output is correct
5 Correct 1 ms 2396 KB Output is correct
6 Correct 1 ms 2396 KB Output is correct

Subtask #2
40.0 / 40.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 2396 KB Output is correct
2 Correct 1 ms 2396 KB Output is correct
3 Correct 1 ms 2396 KB Output is correct
4 Correct 1 ms 2396 KB Output is correct
5 Correct 1 ms 2396 KB Output is correct
6 Correct 1 ms 2396 KB Output is correct
7 Correct 4 ms 2652 KB Output is correct
8 Correct 4 ms 2652 KB Output is correct
9 Correct 6 ms 2648 KB Output is correct
10 Correct 4 ms 2652 KB Output is correct
11 Correct 4 ms 2652 KB Output is correct
12 Correct 4 ms 2652 KB Output is correct

Subtask #3
55.0 / 55.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 2396 KB Output is correct
2 Correct 1 ms 2396 KB Output is correct
3 Correct 1 ms 2396 KB Output is correct
4 Correct 1 ms 2396 KB Output is correct
5 Correct 1 ms 2396 KB Output is correct
6 Correct 1 ms 2396 KB Output is correct
7 Correct 4 ms 2652 KB Output is correct
8 Correct 4 ms 2652 KB Output is correct
9 Correct 6 ms 2648 KB Output is correct
10 Correct 4 ms 2652 KB Output is correct
11 Correct 4 ms 2652 KB Output is correct
12 Correct 4 ms 2652 KB Output is correct
13 Correct 393 ms 36360 KB Output is correct
14 Correct 395 ms 36432 KB Output is correct
15 Correct 388 ms 36436 KB Output is correct
16 Correct 403 ms 36180 KB Output is correct
17 Correct 397 ms 36176 KB Output is correct
18 Correct 316 ms 37000 KB Output is correct