oj.uz

답안 #508458

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
508458 2022-01-13T11:04:36 Z stefantaga Sjeckanje (COCI21_sjeckanje) C++14
110 / 110
 612 ms 30436 KB 
#include <bits/stdc++.h>
using namespace std;

#define TRACE(x) cerr << #x << " = " << x << endl
#define _ << " _ " <<

#define fi first
#define se second

typedef long long ll;
typedef long double ld;
typedef pair<int, int> pii;
typedef vector<int> vi;

const int OFF = 1 << 18;
const ll INF = 4.5e18;

int sgn(ll x) {
    if (x > 0) return +1;
    if (x < 0) return -1;
    return 0;
}

void maxeq(ll& x, ll y) {
    x = max(x, y);
}

ll t[2 * OFF][2][2], d[OFF];
int l[2 * OFF], r[2 * OFF], m[2 * OFF];

void update(int i, ll x) {
    d[i] += x;

    i += OFF;
    t[i][0][0] = 0;
    t[i][1][1] = abs(d[m[i]]);
    t[i][0][1] = t[i][1][0] = -INF;

    for (i /= 2; i > 0; i /= 2) {
        for (int lb : {0, 1}) for (int rb : {0, 1}) {
            ll& T = t[i][lb][rb];
            T = -INF;
            maxeq(T, t[2 * i][lb][0] + t[2 * i + 1][0][rb]);
            maxeq(T, t[2 * i][lb][1] + t[2 * i + 1][0][rb]);
            maxeq(T, t[2 * i][lb][0] + t[2 * i + 1][1][rb]);
            if (sgn(d[m[i] - 1]) * sgn(d[m[i]]) != -1)
                maxeq(T, t[2 * i][lb][1] + t[2 * i + 1][1][rb]);
        }
    }
}

ll query() {
    return max(max(t[1][0][0], t[1][0][1]),
               max(t[1][1][0], t[1][1][1]));
}

int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    cout.tie(0);

    l[1] = 0, r[1] = OFF;
    for (int i = 1; i < 2 * OFF; i++) {
        m[i] = (l[i] + r[i]) / 2;
        if (i < OFF) {
            l[2 * i + 0] = l[i];
            r[2 * i + 0] = l[2 * i + 1] = m[i];
            r[2 * i + 1] = r[i];
        }
    }

    int n, q;
    cin >> n >> q;
    ll x;
    for (int i = 0; i < n; i++) {
        ll y;
        cin >> y;
        if (i > 0) update(i - 1, x - y);
        x = y;
    }

    while (q--) {
        int lq, rq;
        ll w;
        cin >> lq >> rq >> w;

        if (lq > 1) update(lq - 2, -w);
        if (rq < n) update(rq - 1, +w);

        cout << query() << '\n';
    }

    return 0;
}

Subtask #1
15.0 / 15.0

# 결과 실행 시간 메모리 Grader output
1 Correct 5 ms 6476 KB Output is correct
2 Correct 4 ms 6476 KB Output is correct
3 Correct 4 ms 6476 KB Output is correct
4 Correct 5 ms 6480 KB Output is correct
5 Correct 4 ms 6476 KB Output is correct
6 Correct 5 ms 6484 KB Output is correct

Subtask #2
40.0 / 40.0

# 결과 실행 시간 메모리 Grader output
1 Correct 5 ms 6476 KB Output is correct
2 Correct 4 ms 6476 KB Output is correct
3 Correct 4 ms 6476 KB Output is correct
4 Correct 5 ms 6480 KB Output is correct
5 Correct 4 ms 6476 KB Output is correct
6 Correct 5 ms 6484 KB Output is correct
7 Correct 12 ms 6868 KB Output is correct
8 Correct 11 ms 6860 KB Output is correct
9 Correct 9 ms 6840 KB Output is correct
10 Correct 9 ms 6876 KB Output is correct
11 Correct 10 ms 6840 KB Output is correct
12 Correct 10 ms 6876 KB Output is correct

Subtask #3
55.0 / 55.0

# 결과 실행 시간 메모리 Grader output
1 Correct 5 ms 6476 KB Output is correct
2 Correct 4 ms 6476 KB Output is correct
3 Correct 4 ms 6476 KB Output is correct
4 Correct 5 ms 6480 KB Output is correct
5 Correct 4 ms 6476 KB Output is correct
6 Correct 5 ms 6484 KB Output is correct
7 Correct 12 ms 6868 KB Output is correct
8 Correct 11 ms 6860 KB Output is correct
9 Correct 9 ms 6840 KB Output is correct
10 Correct 9 ms 6876 KB Output is correct
11 Correct 10 ms 6840 KB Output is correct
12 Correct 10 ms 6876 KB Output is correct
13 Correct 539 ms 29684 KB Output is correct
14 Correct 528 ms 29628 KB Output is correct
15 Correct 527 ms 29632 KB Output is correct
16 Correct 597 ms 29600 KB Output is correct
17 Correct 612 ms 29508 KB Output is correct
18 Correct 482 ms 30436 KB Output is correct