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Submission #161209

# Submission time Handle Problem Language Result Execution time Memory
161209 2019-11-01T12:26:06 Z rama_pang Global Warming (CEOI18_glo) C++14
62 / 100
 79 ms 11384 KB 
#include <bits/stdc++.h>
using namespace std;
using lint = long long;
const lint INF = 1e15;

lint N, X;
lint A[200005];
lint lis[200005];
lint lds[200005];
pair<lint, lint> anslis[200005];
pair<lint, lint> anslds[200005];


lint LIS() {
    for (int i = 0; i <= N; i++) lis[i] = INF, lds[i] = -INF;
    lis[0] = -INF, lds[N] = INF;

    lint res = 0;

    for (lint i = 0, cur = 0; i < N; i++) {
        lint j = upper_bound(lis, lis + N + 1, A[i] - X) - lis;
        if (lis[j - 1] < A[i] - X && A[i] - X < lis[j]) lis[j] = A[i] - X, cur = max(cur, j);
        anslis[i] = {cur, lis[cur]};
    }

    for (lint i = N - 1, cur = N - 1; i >= 0; i--) {
        lint j = lower_bound(lds, lds + N + 1, A[i]) - lds;
        if (j >= 1 && lds[j - 1] < A[i] && A[i] < lds[j]) lds[j - 1] = A[i], cur = min(cur, j - 1);
        
        anslds[i] = {cur, lds[cur]};
    }

    for (lint i = 0; i <= N; i++) {
        if (lis[i] < INF) res = max(res, i);
    }

    for (lint i = 0; i + 1 < N; i++) {
        if (anslis[i].second < anslds[i + 1].second) 
            res = max(res, anslis[i].first + N - anslds[i + 1].first);
    }

    return res;
}

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

    cin >> N >> X;
    for (int i = 0; i < N; i++) cin >> A[i];

    lint ans = LIS();
    cout << ans << "\n"; 

}

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 2 ms 376 KB Output is correct
3 Correct 2 ms 376 KB Output is correct
4 Correct 2 ms 376 KB Output is correct
5 Correct 2 ms 376 KB Output is correct
6 Correct 2 ms 376 KB Output is correct
7 Correct 2 ms 376 KB Output is correct
8 Correct 2 ms 376 KB Output is correct
9 Correct 2 ms 376 KB Output is correct
10 Correct 4 ms 376 KB Output is correct
11 Correct 2 ms 376 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 2 ms 376 KB Output is correct
3 Correct 2 ms 376 KB Output is correct
4 Correct 2 ms 376 KB Output is correct
5 Correct 2 ms 376 KB Output is correct
6 Correct 2 ms 376 KB Output is correct
7 Correct 2 ms 376 KB Output is correct
8 Correct 2 ms 376 KB Output is correct
9 Correct 2 ms 376 KB Output is correct
10 Correct 4 ms 376 KB Output is correct
11 Correct 2 ms 376 KB Output is correct
12 Correct 2 ms 376 KB Output is correct
13 Correct 2 ms 380 KB Output is correct
14 Correct 2 ms 376 KB Output is correct
15 Correct 2 ms 376 KB Output is correct
16 Correct 2 ms 376 KB Output is correct
17 Correct 2 ms 504 KB Output is correct
18 Correct 2 ms 376 KB Output is correct

Subtask #3
0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 2 ms 376 KB Output is correct
3 Correct 2 ms 376 KB Output is correct
4 Correct 2 ms 376 KB Output is correct
5 Correct 2 ms 376 KB Output is correct
6 Correct 2 ms 376 KB Output is correct
7 Correct 2 ms 376 KB Output is correct
8 Correct 2 ms 376 KB Output is correct
9 Correct 2 ms 376 KB Output is correct
10 Correct 4 ms 376 KB Output is correct
11 Correct 2 ms 376 KB Output is correct
12 Correct 2 ms 376 KB Output is correct
13 Correct 2 ms 380 KB Output is correct
14 Correct 2 ms 376 KB Output is correct
15 Correct 2 ms 376 KB Output is correct
16 Correct 2 ms 376 KB Output is correct
17 Correct 2 ms 504 KB Output is correct
18 Correct 2 ms 376 KB Output is correct
19 Incorrect 2 ms 376 KB Output isn't correct
20 Halted 0 ms 0 KB -

Subtask #4
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 71 ms 11236 KB Output is correct
2 Correct 73 ms 11296 KB Output is correct
3 Correct 74 ms 11384 KB Output is correct
4 Correct 72 ms 11256 KB Output is correct
5 Correct 59 ms 11300 KB Output is correct

Subtask #5
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 18 ms 3068 KB Output is correct
2 Correct 20 ms 3100 KB Output is correct
3 Correct 18 ms 3064 KB Output is correct
4 Correct 15 ms 3064 KB Output is correct
5 Correct 2 ms 376 KB Output is correct
6 Correct 16 ms 3192 KB Output is correct
7 Correct 16 ms 3064 KB Output is correct

Subtask #6
17.0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 36 ms 5880 KB Output is correct
2 Correct 36 ms 5804 KB Output is correct
3 Correct 79 ms 11296 KB Output is correct
4 Correct 55 ms 11280 KB Output is correct
5 Correct 29 ms 5880 KB Output is correct
6 Correct 50 ms 10744 KB Output is correct
7 Correct 59 ms 10744 KB Output is correct
8 Correct 67 ms 5880 KB Output is correct

Subtask #7
0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 2 ms 376 KB Output is correct
3 Correct 2 ms 376 KB Output is correct
4 Correct 2 ms 376 KB Output is correct
5 Correct 2 ms 376 KB Output is correct
6 Correct 2 ms 376 KB Output is correct
7 Correct 2 ms 376 KB Output is correct
8 Correct 2 ms 376 KB Output is correct
9 Correct 2 ms 376 KB Output is correct
10 Correct 4 ms 376 KB Output is correct
11 Correct 2 ms 376 KB Output is correct
12 Correct 2 ms 376 KB Output is correct
13 Correct 2 ms 380 KB Output is correct
14 Correct 2 ms 376 KB Output is correct
15 Correct 2 ms 376 KB Output is correct
16 Correct 2 ms 376 KB Output is correct
17 Correct 2 ms 504 KB Output is correct
18 Correct 2 ms 376 KB Output is correct
19 Incorrect 2 ms 376 KB Output isn't correct
20 Halted 0 ms 0 KB -