Submission #552055

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
552055	2022-04-22T10:47:12 Z	Alexandruabcde	Sailing Race (CEOI12_race)	C++14	40 / 100	158 ms	2652 KB

race

#include <bits/stdc++.h>

using namespace std;

constexpr int NMAX = 502;

int N, K;

vector <int> G[NMAX];

void Read () {
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
    cin >> N >> K;

    for (int i = 1; i <= N; ++ i ) {
        int x;
        cin >> x;

        while (x != 0) {
            G[i].push_back(x);
            cin >> x;
        }
    }
}

bool Between (int val, int st, int dr) {
    if (st <= dr)
        return (st <= val && val <= dr);

    return (st <= val || val <= dr);
}

int Before (int val) {
    if (val > 1) return val-1;

    return N;
}

int After (int val) {
    if (val < N) return val + 1;

    return 1;
}

int dp[NMAX][NMAX][2];

void Precompute () {
    for (int i = 1; i <= N; ++ i )
        for (int j = 1; j <= N; ++ j )
            for (int c = 0; c < 2; ++ c )
                dp[i][j][c] = 0;

    for (int lg = 2; lg <= N; ++ lg ) {
        for (int i = 1; i <= N; ++ i ) {
            int j = i + lg - 1;
            if (j > N) j -= N;

            dp[i][j][0] = dp[i][j][1] = 0;

            ///Caz I: din i
            for (auto vec : G[i]) {
                if (!Between(vec, i, j)) continue;

                dp[i][j][0] = max(dp[i][j][0], 1 + max(dp[After(i)][vec][1], dp[vec][j][0]));
            }

            ///Caz II: din j
            for (auto vec : G[j]) {
                if (!Between(vec, i, j)) continue;

                dp[i][j][1] = max(dp[i][j][1], 1 + max(dp[i][vec][1], dp[vec][Before(j)][0]));
            }
        }
    }
}

void Solve_Case_0 () {
    int ans = 0, start = 1;
    for (int i = 1; i <= N; ++ i ) {
        for (auto vec : G[i]) {
            ///i -> vec

            int posib = 1 + max(dp[After(i)][vec][1], dp[vec][Before(i)][0]);

            if (posib > ans) {
                ans = posib;
                start = i;
            }
        }
    }

    cout << ans << '\n' << start << '\n';
}

int main () {
    Read();
    Precompute();
    if (K == 0) Solve_Case_0 ();

    return 0;
}

Subtask #1

40.0 / 100.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	1 ms	340 KB	Output is correct
2	Incorrect	1 ms	340 KB	Unexpected end of file - int32 expected
3	Incorrect	1 ms	340 KB	Unexpected end of file - int32 expected
4	Incorrect	1 ms	472 KB	Unexpected end of file - int32 expected
5	Correct	1 ms	468 KB	Output is correct
6	Incorrect	1 ms	468 KB	Unexpected end of file - int32 expected
7	Correct	2 ms	604 KB	Output is correct
8	Incorrect	2 ms	596 KB	Unexpected end of file - int32 expected
9	Correct	4 ms	724 KB	Output is correct
10	Correct	8 ms	724 KB	Output is correct
11	Correct	5 ms	740 KB	Output is correct
12	Incorrect	11 ms	1108 KB	Unexpected end of file - int32 expected
13	Incorrect	20 ms	1492 KB	Unexpected end of file - int32 expected
14	Correct	39 ms	2004 KB	Output is correct
15	Incorrect	110 ms	2516 KB	Unexpected end of file - int32 expected
16	Incorrect	140 ms	2652 KB	Unexpected end of file - int32 expected
17	Incorrect	118 ms	2516 KB	Unexpected end of file - int32 expected
18	Correct	48 ms	2388 KB	Output is correct
19	Incorrect	157 ms	2644 KB	Unexpected end of file - int32 expected
20	Incorrect	158 ms	2644 KB	Unexpected end of file - int32 expected