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Submission #796460

# Submission time Handle Problem Language Result Execution time Memory
796460 2023-07-28T12:07:12 Z cfhater Collecting Stamps 3 (JOI20_ho_t3) C++17
5 / 100
 243 ms 53376 KB 
#include <bits/stdc++.h>

using namespace std;

typedef long long ll;
#define all(x) x.begin(), x.end()
#define rall(x) x.rbegin(), x.rend()
#define int ll

const int INF = 1e18, MAXN = 205, MOD = 1e9 + 7;

int n, l;
int dp[MAXN][MAXN][MAXN][2];

int dist(int a, int b) {
    return min((a - b + l) % l, (b - a + l) % l);
}

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

    cin >> n >> l;
    vector<pair<int, int>> left(n);
    for (auto& i : left)
        cin >> i.first;
    for (auto& i : left)
        cin >> i.second;
    auto right = left;
    left.push_back({0, 0});
    right.push_back({l, 0});
    sort(all(left));
    sort(rall(right));

    int res = 0;
    for (int lb = 0; lb <= n; lb++)
        for (int rb = 0; lb + rb <= n; rb++)
            for (int cnt = 0; cnt <= n; cnt++)
                dp[lb][rb][cnt][0] = dp[lb][rb][cnt][1] = INF;
    for (int lb = 1; lb <= n; lb++) {
        if (dist(0, left[lb].first) <= left[lb].second) {
            dp[lb][0][1][0] = dist(0, left[lb].first);
            res = 1;
        }
    }
    for (int rb = 1; rb <= n; rb++) {
        if (dist(0, right[rb].first) <= right[rb].second) {
            dp[0][rb][1][1] = dist(0, right[rb].first);
            res = 1;
        }
    }

    for (int lb = 0; lb <= n; lb++) {
        for (int rb = 0; lb + rb <= n; rb++) {
            for (int cnt = 2; cnt <= n; cnt++) {
                if (lb > 0)
                    dp[lb][rb][cnt][0] = min(dp[lb][rb][cnt][0], dp[lb - 1][rb][cnt][0] + dist(left[lb - 1].first, left[lb].first));
                if (rb > 0)
                    dp[lb][rb][cnt][0] = min(dp[lb][rb][cnt][0], dp[lb][rb - 1][cnt][1] + dist(right[rb - 1].first, left[lb].first));
                if (lb > 0 and dp[lb - 1][rb][cnt - 1][0] + dist(left[lb - 1].first, left[lb].first) <= left[lb].second)
                    dp[lb][rb][cnt][0] = min(dp[lb][rb][cnt][0], dp[lb - 1][rb][cnt - 1][0] + dist(left[lb - 1].first, left[lb].first));
                if (lb > 0 and dp[lb - 1][rb][cnt - 1][1] + dist(right[rb].first, left[lb].first) <= left[lb].second)
                    dp[lb][rb][cnt][0] = min(dp[lb][rb][cnt][0], dp[lb - 1][rb][cnt - 1][1] + dist(right[rb].first, left[lb].first));

                if (lb > 0)
                    dp[lb][rb][cnt][1] = min(dp[lb][rb][cnt][1], dp[lb - 1][rb][cnt][0] + dist(left[lb - 1].first, right[rb].first));
                if (rb > 0)
                    dp[lb][rb][cnt][1] = min(dp[lb][rb][cnt][1], dp[lb][rb - 1][cnt][1] + dist(right[rb - 1].first, right[rb].first));
                if (rb > 0 and dp[lb][rb - 1][cnt - 1][1] + dist(right[rb - 1].first, right[rb].first) <= right[rb].second)
                    dp[lb][rb][cnt][1] = min(dp[lb][rb][cnt][1], dp[lb][rb - 1][cnt - 1][1] + dist(right[rb - 1].first, right[rb].first));
                if (rb > 0 and dp[lb][rb - 1][cnt - 1][0] + dist(left[lb].first, right[rb].first) <= right[rb].second)
                    dp[lb][rb][cnt][1] = min(dp[lb][rb][cnt][1], dp[lb][rb - 1][cnt - 1][0] + dist(left[lb].first, right[rb].first));

                dp[lb][rb][cnt][0] = min(dp[lb][rb][cnt][0], dp[lb][rb][cnt][1] + dist(left[lb].first, right[rb].first));
                dp[lb][rb][cnt][1] = min(dp[lb][rb][cnt][1], dp[lb][rb][cnt][0] + dist(left[lb].first, right[rb].first));

                if (dp[lb][rb][cnt][0] < INF or dp[lb][rb][cnt][1] < INF)
                    res = max(res, cnt);
                if (lb == 0 and cnt >= 4 and rb >= 4)
                    int x = 0;
            }
        }
    }

    cout << res;
}

Compilation message

ho_t3.cpp: In function 'int main()':
ho_t3.cpp:80:25: warning: unused variable 'x' [-Wunused-variable]
   80 |                     int x = 0;
      |                         ^

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 ms 468 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 596 KB Output is correct
7 Correct 1 ms 468 KB Output is correct
8 Correct 1 ms 456 KB Output is correct
9 Correct 1 ms 580 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 1 ms 340 KB Output is correct
12 Correct 1 ms 596 KB Output is correct
13 Correct 1 ms 596 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 1 ms 468 KB Output is correct
16 Correct 1 ms 596 KB Output is correct
17 Correct 1 ms 596 KB Output is correct

Subtask #2
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 ms 468 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 596 KB Output is correct
7 Correct 1 ms 468 KB Output is correct
8 Correct 1 ms 456 KB Output is correct
9 Correct 1 ms 580 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 1 ms 340 KB Output is correct
12 Correct 1 ms 596 KB Output is correct
13 Correct 1 ms 596 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 1 ms 468 KB Output is correct
16 Correct 1 ms 596 KB Output is correct
17 Correct 1 ms 596 KB Output is correct
18 Correct 1 ms 724 KB Output is correct
19 Incorrect 1 ms 468 KB Output isn't correct
20 Halted 0 ms 0 KB -

Subtask #3
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 ms 468 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 596 KB Output is correct
7 Correct 1 ms 468 KB Output is correct
8 Correct 1 ms 456 KB Output is correct
9 Correct 1 ms 580 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 1 ms 340 KB Output is correct
12 Correct 1 ms 596 KB Output is correct
13 Correct 1 ms 596 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 1 ms 468 KB Output is correct
16 Correct 1 ms 596 KB Output is correct
17 Correct 1 ms 596 KB Output is correct
18 Correct 243 ms 53376 KB Output is correct
19 Correct 123 ms 32528 KB Output is correct
20 Correct 48 ms 17492 KB Output is correct
21 Correct 111 ms 30728 KB Output is correct
22 Correct 161 ms 39744 KB Output is correct
23 Correct 41 ms 14944 KB Output is correct
24 Incorrect 27 ms 11720 KB Output isn't correct
25 Halted 0 ms 0 KB -

Subtask #4
0 / 75.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 ms 468 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 596 KB Output is correct
7 Correct 1 ms 468 KB Output is correct
8 Correct 1 ms 456 KB Output is correct
9 Correct 1 ms 580 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 1 ms 340 KB Output is correct
12 Correct 1 ms 596 KB Output is correct
13 Correct 1 ms 596 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 1 ms 468 KB Output is correct
16 Correct 1 ms 596 KB Output is correct
17 Correct 1 ms 596 KB Output is correct
18 Correct 1 ms 724 KB Output is correct
19 Incorrect 1 ms 468 KB Output isn't correct
20 Halted 0 ms 0 KB -