oj.uz

Submission #932244

# Submission time Handle Problem Language Result Execution time Memory
932244 2024-02-23T06:18:14 Z tkm_algorithms Sjeckanje (COCI21_sjeckanje) C++17
110 / 110
 440 ms 28644 KB 
#include <bits/stdc++.h>

#define int long long
using namespace std;
int T[800100][2][2], arr[200100];

void merge(int n, int mid) {
    for (int i = 0; i < 2; i++)
        for (int j = 0; j < 2; j++) {
            T[n][i][j] = -1e18;
            for (int k = 0; k < 2; k++)
                for (int l = 0; l < 2; l++)
                    if (l != 1 || k != 1 || arr[mid] * arr[mid + 1] >= 0)
                        T[n][i][j] = max(T[n][i][j], T[n * 2][i][k] + T[n * 2 + 1][l][j]);
        }
}

void upd(int p, int l, int r, int pos) {
    if (l == r) {
        T[p][1][1] = abs(arr[l]);
        return;
    }
    int mid = l + r >> 1;
    if (pos <= mid)
        upd(p * 2, l, mid, pos);
    else
        upd(p * 2 + 1, mid + 1, r, pos);
    merge(p, mid);
}

signed main() {
    cin.sync_with_stdio(false);
    cin.tie(nullptr);
    int n, q;
    cin >> n >> q;
    for (int i = 1; i <= n; i++)
        cin >> arr[i];
    for (int i = n; --i;)
        arr[i + 1] -= arr[i], upd(1, 1, n, i + 1);
    arr[1] = 0;
    for (int i = 0; i < q; i++) {
        int l, r, x;
        cin >> l >> r >> x;
        if (l != 1)
            arr[l] += x, upd(1, 1, n, l);
        if (r != n)
            arr[r + 1] -= x, upd(1, 1, n, r + 1);
        cout << max(max(T[1][0][0], T[1][0][1]), max(T[1][1][0], T[1][1][1])) << '\n';
    }
}

Compilation message

Main.cpp: In function 'void upd(long long int, long long int, long long int, long long int)':
Main.cpp:23:17: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   23 |     int mid = l + r >> 1;
      |               ~~^~~

Subtask #1
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2392 KB Output is correct
2 Correct 1 ms 2804 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

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2392 KB Output is correct
2 Correct 1 ms 2804 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 4 ms 2652 KB Output is correct
10 Correct 4 ms 2624 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

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2392 KB Output is correct
2 Correct 1 ms 2804 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 4 ms 2652 KB Output is correct
10 Correct 4 ms 2624 KB Output is correct
11 Correct 4 ms 2652 KB Output is correct
12 Correct 4 ms 2652 KB Output is correct
13 Correct 440 ms 28240 KB Output is correct
14 Correct 381 ms 28232 KB Output is correct
15 Correct 431 ms 28040 KB Output is correct
16 Correct 415 ms 28088 KB Output is correct
17 Correct 387 ms 27932 KB Output is correct
18 Correct 330 ms 28644 KB Output is correct