oj.uz

Submission #1075735

# Submission time Handle Problem Language Result Execution time Memory
1075735 2024-08-26T08:55:19 Z raphaelp Sprinklers (CEOI24_sprinklers) C++14
26 / 100
 490 ms 11944 KB 
#include <bits/stdc++.h>
using namespace std;
bool solve(vector<int> &S, vector<int> &F, int K, vector<int> &ans)
{
    int N = S.size(), M = F.size();
    vector<pair<int, int>> dp(M + 1, {-1, -1});
    vector<pair<vector<pair<int, int>>, vector<pair<int, int>>>> changes(M + 1);
    dp[0].first = -2;
    if (S[0] < F[0])
        dp[0].second = -2;
    for (int i = 0; i < M; i++)
    {
        if (dp[i].first != -1)
        {
            int x = lower_bound(S.begin(), S.end(), F[i]) - S.begin();
            if (x != N && S[x] - K <= F[i])
            {
                int y = lower_bound(F.begin(), F.end(), S[x]) - F.begin();
                dp[y].first = i;
                changes[y].first = {{x, -1}};
                if (x < N - 1 && y < M && S[x + 1] < F[y])
                {
                    dp[y].second = i;
                    changes[y].second = {{x, -1}};
                }
                if (x < N - 1 && S[x + 1] - K <= F[i])
                {
                    y = upper_bound(F.begin(), F.end(), S[x] + K) - F.begin();
                    dp[y].first = i;
                    changes[y].first = {{x, 1}, {x + 1, -1}};
                    if (x < N - 2 && y < M && S[x + 2] < F[y])
                    {
                        dp[y].second = i;
                        changes[y].second = {{x, 1}, {x + 1, -1}};
                    }
                }
            }
        }
        if (dp[i].second != -1)
        {
            int x = lower_bound(S.begin(), S.end(), F[i]) - S.begin() - 1;
            if (x == -1)
                continue;
            if (S[x] + K < F[i])
                continue;
            int y = upper_bound(F.begin(), F.end(), S[x] + K) - F.begin();
            dp[y].first = i + ((i == 0) ? 0 : M);
            changes[y].first = {{x, 1}};
            if (x < N - 1 && y < M && S[x + 1] < F[y])
            {
                dp[y].second = i + ((i == 0) ? 0 : M);
                changes[y].second = {{x, 1}};
            }
        }
    }

    if (dp[M].first != -1 || dp[M].second != -1)
    {
        int x = 0;
        if (dp[M].first != -1)
            x = M;
        else
            x = M + M;
        while (x != 0)
        {
            if (x > M)
            {
                for (int i = 0; i < changes[x - M].second.size(); i++)
                    ans[changes[x - M].second[i].first] = changes[x - M].second[i].second;
                x = dp[x - M].second;
            }
            else
            {
                for (int i = 0; i < changes[x].first.size(); i++)
                    ans[changes[x].first[i].first] = changes[x].first[i].second;
                x = dp[x].first;
            }
        }
        return 1;
    }
    else
        return 0;
}
int main()
{
    int N, M;
    cin >> N >> M;
    vector<int> S(N), F(M), F2;
    for (int i = 0; i < N; i++)
    {
        cin >> S[i];
    }
    for (int i = 0; i < M; i++)
    {
        cin >> F[i];
    }
    int buff = 0;
    for (int i = 0; i < N; i++)
    {
        while (buff < M && F[buff] <= S[i])
        {
            if (F[buff] != S[i])
                F2.push_back(F[buff]);
            buff++;
        }
    }
    while (buff < M)
        F2.push_back(F[buff++]);
    swap(F, F2);
    if (N == 1 && F[0] < S[0] && F[M - 1] > S[0])
    {
        cout << -1;
        return 0;
    }
    int L = 0, R = 1000000000;
    vector<int> ans(N + 1);
    while (L != R)
    {
        int m = (L + R) / 2;
        if (solve(S, F, m, ans))
            R = m;
        else
            L = m + 1;
    }
    bool b = solve(S, F, L, ans);
    cout << L << endl;
    for (int i = 0; i < N; i++)
        cout << ((ans[i] == 1) ? 'R' : 'L');
}

Compilation message

Main.cpp: In function 'bool solve(std::vector<int>&, std::vector<int>&, int, std::vector<int>&)':
Main.cpp:68:35: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   68 |                 for (int i = 0; i < changes[x - M].second.size(); i++)
      |                                 ~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Main.cpp:74:35: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   74 |                 for (int i = 0; i < changes[x].first.size(); i++)
      |                                 ~~^~~~~~~~~~~~~~~~~~~~~~~~~
Main.cpp: In function 'int main()':
Main.cpp:125:10: warning: unused variable 'b' [-Wunused-variable]
  125 |     bool b = solve(S, F, L, ans);
      |          ^

Subtask #0
0.0 / 0.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Correct
2 Correct 0 ms 348 KB Correct

Subtask #1
3.0 / 3.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Correct
2 Correct 37 ms 5588 KB Correct
3 Correct 0 ms 344 KB Correct
4 Correct 25 ms 1476 KB Correct
5 Correct 26 ms 1240 KB Correct
6 Correct 1 ms 348 KB Correct
7 Correct 1 ms 348 KB Correct
8 Correct 5 ms 604 KB Correct
9 Correct 1 ms 344 KB Correct

Subtask #2
6.0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Correct
2 Correct 45 ms 6584 KB Correct
3 Correct 26 ms 960 KB Correct
4 Correct 359 ms 9924 KB Correct
5 Correct 379 ms 9936 KB Correct
6 Correct 1 ms 600 KB Correct
7 Correct 0 ms 348 KB Correct
8 Correct 58 ms 3008 KB Correct
9 Correct 58 ms 3284 KB Correct
10 Correct 192 ms 7152 KB Correct
11 Correct 29 ms 1112 KB Correct
12 Correct 199 ms 8848 KB Correct
13 Correct 249 ms 7492 KB Correct
14 Correct 315 ms 8620 KB Correct
15 Correct 271 ms 8808 KB Correct
16 Correct 164 ms 5300 KB Correct

Subtask #3
17.0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Correct
2 Correct 0 ms 348 KB Correct
3 Correct 1 ms 348 KB Correct
4 Correct 1 ms 348 KB Correct
5 Correct 1 ms 348 KB Correct
6 Correct 1 ms 348 KB Correct
7 Correct 0 ms 348 KB Correct
8 Correct 1 ms 420 KB Correct
9 Correct 1 ms 344 KB Correct
10 Correct 1 ms 348 KB Correct
11 Correct 1 ms 360 KB Correct
12 Correct 1 ms 348 KB Correct
13 Correct 1 ms 348 KB Correct
14 Correct 1 ms 348 KB Correct
15 Correct 1 ms 348 KB Correct
16 Correct 1 ms 348 KB Correct
17 Correct 1 ms 348 KB Correct
18 Correct 1 ms 348 KB Correct
19 Correct 1 ms 444 KB Correct
20 Correct 1 ms 348 KB Correct

Subtask #4
0.0 / 27.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Correct
2 Correct 106 ms 6132 KB Correct
3 Correct 446 ms 9784 KB Correct
4 Correct 490 ms 9828 KB Correct
5 Correct 451 ms 11300 KB Correct
6 Correct 465 ms 11580 KB Correct
7 Correct 474 ms 11944 KB Correct
8 Correct 475 ms 11816 KB Correct
9 Correct 482 ms 11760 KB Correct
10 Correct 461 ms 11684 KB Correct
11 Correct 482 ms 11784 KB Correct
12 Correct 0 ms 348 KB Correct
13 Correct 1 ms 408 KB Correct
14 Runtime error 26 ms 2992 KB Execution killed with signal 11
15 Halted 0 ms 0 KB -

Subtask #5
0.0 / 47.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Correct
2 Correct 0 ms 348 KB Correct
3 Correct 37 ms 5588 KB Correct
4 Correct 0 ms 344 KB Correct
5 Correct 25 ms 1476 KB Correct
6 Correct 26 ms 1240 KB Correct
7 Correct 1 ms 348 KB Correct
8 Correct 1 ms 348 KB Correct
9 Correct 5 ms 604 KB Correct
10 Correct 1 ms 344 KB Correct
11 Correct 45 ms 6584 KB Correct
12 Correct 26 ms 960 KB Correct
13 Correct 359 ms 9924 KB Correct
14 Correct 379 ms 9936 KB Correct
15 Correct 1 ms 600 KB Correct
16 Correct 0 ms 348 KB Correct
17 Correct 58 ms 3008 KB Correct
18 Correct 58 ms 3284 KB Correct
19 Correct 192 ms 7152 KB Correct
20 Correct 29 ms 1112 KB Correct
21 Correct 199 ms 8848 KB Correct
22 Correct 249 ms 7492 KB Correct
23 Correct 315 ms 8620 KB Correct
24 Correct 271 ms 8808 KB Correct
25 Correct 164 ms 5300 KB Correct
26 Correct 1 ms 348 KB Correct
27 Correct 1 ms 348 KB Correct
28 Correct 1 ms 348 KB Correct
29 Correct 1 ms 348 KB Correct
30 Correct 0 ms 348 KB Correct
31 Correct 1 ms 420 KB Correct
32 Correct 1 ms 344 KB Correct
33 Correct 1 ms 348 KB Correct
34 Correct 1 ms 360 KB Correct
35 Correct 1 ms 348 KB Correct
36 Correct 1 ms 348 KB Correct
37 Correct 1 ms 348 KB Correct
38 Correct 1 ms 348 KB Correct
39 Correct 1 ms 348 KB Correct
40 Correct 1 ms 348 KB Correct
41 Correct 1 ms 348 KB Correct
42 Correct 1 ms 444 KB Correct
43 Correct 1 ms 348 KB Correct
44 Correct 106 ms 6132 KB Correct
45 Correct 446 ms 9784 KB Correct
46 Correct 490 ms 9828 KB Correct
47 Correct 451 ms 11300 KB Correct
48 Correct 465 ms 11580 KB Correct
49 Correct 474 ms 11944 KB Correct
50 Correct 475 ms 11816 KB Correct
51 Correct 482 ms 11760 KB Correct
52 Correct 461 ms 11684 KB Correct
53 Correct 482 ms 11784 KB Correct
54 Correct 0 ms 348 KB Correct
55 Correct 1 ms 408 KB Correct
56 Runtime error 26 ms 2992 KB Execution killed with signal 11
57 Halted 0 ms 0 KB -