oj.uz

Submission #802044

# Submission time Handle Problem Language Result Execution time Memory
802044 2023-08-02T09:20:42 Z Johann Mizuyokan 2 (JOI23_mizuyokan2) C++14
0 / 100
 4000 ms 6252 KB 
#include "bits/stdc++.h"
using namespace std;

typedef long long ll;
typedef vector<ll> vi;
typedef vector<vi> vvi;
#define sz(x) (int)(x).size()
#define all(x) (x).begin(), (x).end()

const int INF = 1e9;

int N, Q;
vi L;

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

    cin >> N;
    L.resize(N);
    for (int i = 0; i < N; ++i)
        cin >> L[i];
    cin >> Q;

    while (Q--)
    {
        ll x, y, a, b;
        cin >> x >> y >> a >> b;
        --x;
        L[x] = y;
        vi B(L.begin() + a, L.begin() + b);
        // starting with lower piece
        vi dp(sz(B), -INF); // dp[i] := number of zigzag pieces in prefix i with i as minimum

        dp[0] = 1;
        for (int i = 1; i < sz(B); ++i)
        {
            ll buffer = 0;
            int lowerbound = max(0, i - (int)ceil(log2(B[i])) - 3);
            for (int j = i - 1; j >= lowerbound; --j)
            {
                buffer += B[j];
                if (buffer > B[i])
                {
                    dp[i] = max(dp[i], 2LL);
                    if (j > 0 && buffer > B[j - 1])
                        dp[i] = max(dp[i], dp[j - 1] + 2);
                }
            }
        }

        ll ans = max(1LL, dp.back());
        ll buffer = 0;
        for (int i = sz(B) - 1; i > 0; --i)
        {
            buffer += B[i];
            if (buffer > B[i - 1])
                ans = max(ans, dp[i - 1] + 1);
        }

        cout << ans << "\n";
    }
}

Subtask #1
0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Incorrect 0 ms 212 KB Output isn't correct
8 Halted 0 ms 0 KB -

Subtask #2
0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Incorrect 0 ms 212 KB Output isn't correct
8 Halted 0 ms 0 KB -

Subtask #3
0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Incorrect 0 ms 212 KB Output isn't correct
8 Halted 0 ms 0 KB -

Subtask #4
0 / 32.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 202 ms 1868 KB Output is correct
3 Correct 954 ms 2484 KB Output is correct
4 Execution timed out 4082 ms 2480 KB Time limit exceeded
5 Halted 0 ms 0 KB -

Subtask #5
0 / 29.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 158 ms 2312 KB Output is correct
4 Correct 700 ms 2484 KB Output is correct
5 Execution timed out 4054 ms 6252 KB Time limit exceeded
6 Halted 0 ms 0 KB -

Subtask #6
0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Incorrect 0 ms 212 KB Output isn't correct
8 Halted 0 ms 0 KB -