oj.uz

Submission #1084802

# Submission time Handle Problem Language Result Execution time Memory
1084802 2024-09-07T03:19:28 Z duytuandao21 Sjeckanje (COCI21_sjeckanje) C++17
110 / 110
 308 ms 29524 KB 
#include<bits/stdc++.h>
using namespace std;

const int N = 2e6 + 7;
const int inf = 1e9 + 7;
const long long infll = 1e18 + 7;

int n, q;
long long a[N], b[N];
long long seg[4 * N][2][2];

void update(int id, int l, int r, int pos, int v) {
    if (r < pos ||  l > pos) return;
    if (l == r) {
        if (l == pos) b[l] += v;
        seg[id][1][1] = abs(b[l]);
        seg[id][0][0] = 0;
        return;
    }
    int mid = (l + r) / 2;
    update(id * 2, l, mid, pos, v);
    update(id * 2 + 1, mid + 1, r, pos, v);
    int x = id * 2, y = id * 2 + 1;
    //merge two segment;
    seg[id][0][0] = max(seg[x][0][0] + seg[y][0][0], max(seg[x][0][1] + seg[y][0][0], seg[x][0][0] + seg[y][1][0]));
    seg[id][1][0] = max(seg[x][1][0] + seg[y][0][0], max(seg[x][1][1] + seg[y][0][0], seg[x][1][0] + seg[y][1][0]));
    seg[id][0][1] = max(seg[x][0][0] + seg[y][0][1], max(seg[x][0][1] + seg[y][0][1], seg[x][0][0] + seg[y][1][1]));
    seg[id][1][1] = max(seg[x][1][0] + seg[y][0][1], max(seg[x][1][1] + seg[y][0][1], seg[x][1][0] + seg[y][1][1]));
    if ((b[mid] < 0 && b[mid + 1] < 0) || (b[mid] > 0 && b[mid + 1] > 0)) {
        seg[id][0][0] = max(seg[id][0][0], seg[x][0][1] + seg[y][1][0]);
        seg[id][1][0] = max(seg[id][0][0], seg[x][1][1] + seg[y][1][0]);
        seg[id][0][1] = max(seg[id][0][0], seg[x][0][1] + seg[y][1][1]);
        seg[id][1][1] = max(seg[id][0][0], seg[x][1][1] + seg[y][1][1]);
    }
}
int main() 
{
    ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
    cin >> n >> q;
    for (int i = 1; i <= n; i++) cin >> a[i];
    for (int i = 1; i < n; i++) {
        update(1, 1, n - 1, i, a[i] - a[i + 1]);
    }
    while (q--) {
        int l, r;
        long long v; 
        cin >> l >> r >> v;
        update(1, 1, n - 1, l - 1, -v);
        update(1, 1, n - 1, r, v);
        cout << max(max(seg[1][0][0], seg[1][0][1]), max(seg[1][1][0], seg[1][1][1]));
        if (q > 0) cout << '\n';
    }
    return 0;
}

Subtask #1
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 1 ms 348 KB Output is correct

Subtask #2
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 1 ms 348 KB Output is correct
7 Correct 3 ms 860 KB Output is correct
8 Correct 6 ms 880 KB Output is correct
9 Correct 4 ms 860 KB Output is correct
10 Correct 4 ms 860 KB Output is correct
11 Correct 3 ms 860 KB Output is correct
12 Correct 3 ms 860 KB Output is correct

Subtask #3
55.0 / 55.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 1 ms 348 KB Output is correct
7 Correct 3 ms 860 KB Output is correct
8 Correct 6 ms 880 KB Output is correct
9 Correct 4 ms 860 KB Output is correct
10 Correct 4 ms 860 KB Output is correct
11 Correct 3 ms 860 KB Output is correct
12 Correct 3 ms 860 KB Output is correct
13 Correct 294 ms 29156 KB Output is correct
14 Correct 308 ms 29136 KB Output is correct
15 Correct 295 ms 29092 KB Output is correct
16 Correct 295 ms 29012 KB Output is correct
17 Correct 281 ms 28804 KB Output is correct
18 Correct 254 ms 29524 KB Output is correct