oj.uz

Submission #1072818

# Submission time Handle Problem Language Result Execution time Memory
1072818 2024-08-24T05:33:53 Z jer033 Sprinklers (CEOI24_sprinklers) C++17
3 / 100
 54 ms 1628 KB 
#include <bits/stdc++.h>
using namespace std;

vector<int> in_between;

bool possible(int K, vector<int> (&sprinks), vector<int> (&flowers))
{
    int N = sprinks.size();
    int M = flowers.size();
    int covered = -1;
    int towater = 0;
    int i = 0;
    while (i<N)
    {
        if (towater<M)
        {
            int loc = sprinks[i];
            if (flowers[towater]<loc)
            {
                if (flowers[towater] < (loc-K))
                    return 0;
                if (((i+1)<N) and (flowers[towater] >= (sprinks[i+1]-K)) and (in_between[i]>0))
                {
                    i++;
                    covered = loc+K;
                }
                else
                    covered = loc;
            }
            else
                covered = loc+K;

            while ((towater<M) and (flowers[towater]<=covered))
                towater++;
        }
        i++;
    }
    if (towater==M)
        return 1;
    return 0;
}

/*int seed=525697;

int rando(int a, int b)
{
    seed += a;
    seed = b*seed;
    seed = (seed*seed*seed + seed*seed*3 + 200*seed*seed*seed*b*seed + a*a*a);
    seed = abs(seed);
    int beed = seed%(b-a+1);
    return a + beed;
}

void check(int j)
{
    vector<int> spri;
    vector<int> flow;
    for (int i=0; i<10000; i++)
    {
        int k = rando(8, 170108);
        spri.push_back(k);
        if ((rando(1, 2)==1))
        {
            for (int j=0; j<rando(1, 8); j++)
                flow.push_back(rando(k-8, k));
        }
        else
        {
            for (int j=0; j<rando(1, 8); j++)
                flow.push_back(rando(k, k+8));
        } 
    }
    sort(spri.begin(), spri.end());
    sort(flow.begin(), flow.end());
    if (!possible(8, spri, flow))
        cout << "alert!!!" << j << '\n';
    else
        seed = 7812364+j*j*j*seed+seed*seed+5*seed+(seed%27263);
}*/

void report(int K, vector<int> (&sprinks), vector<int> (&flowers))
{
    cout << K << '\n';
    int N = sprinks.size();
    int M = flowers.size();
    int covered = -1;
    int towater = 0;
    int i = 0;
    while (i<N)
    {
        if (towater<M)
        {
            int loc = sprinks[i];
            if (flowers[towater]<loc)
            {
                if (((i+1)<N) and (flowers[towater] >= (sprinks[i+1]-K)) and (in_between[i]>0))
                {
                    i++;
                    covered = loc+K;
                    cout << "RL";
                }
                else
                {
                    covered = loc;
                    cout << 'L';
                }
            }
            else
            {
                covered = loc+K;
                cout << 'R';
            }

            while ((towater<M) and (flowers[towater]<=covered))
                towater++;
        }
        else
            cout << 'R';
        i++;
    }
    cout << '\n';
}

int main()
{
    int N, M;
    cin >> N >> M;
    vector<int> sprinks(N);
    vector<int> flowers(M);
    for (int i=0; i<N; i++)
        cin >> sprinks[i];
    for (int i=0; i<M; i++)
        cin >> flowers[i];
    if (N==1)
    {
        int left = flowers[0]-sprinks[0];
        int righ = flowers[M-1]-sprinks[0];
        if ((left<0) and (righ>0))
            cout << "-1\n";
        else
        {
            cout << max(abs(left), abs(righ)) << '\n';
            if (left<0)
                cout << "L\n";
            else
                cout << "R\n";
        }
    }
    else
    {
        in_between = vector<int> (N-1, 0);
        int curr = 0;
        for (int i=0; i<M; i++)
        {
            while (((curr+1)<N) and (flowers[i]>=sprinks[curr+1]))
                curr++;
            if (((curr+1)<N) and (flowers[i]>sprinks[curr]) and (flowers[i]<sprinks[curr+1]))
                in_between[curr]++;
        }

        bool tapos = 0;
        for (int guess = 0; guess<=10; guess++)
        {
            if ((!tapos) and possible(guess, sprinks, flowers))
            {
                report(guess, sprinks, flowers);
                tapos = 1;
            }
        }
        //for (int i=0; i<(N-1); i++)
            //cout << in_between[i] << '\n';

        /*int lo = 0;
        int hi = 1'000'000'005;
        while (lo!=hi)
        {
            int mid = (lo+hi)/2;
            if (possible(mid, sprinks, flowers))
                hi = mid;
            else
                lo = mid+1;
        }
        report(lo, sprinks, flowers);*/
    }
}

Subtask #0
0.0 / 0.0

# Verdict Execution time Memory Grader output
1 Correct 0 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 19 ms 604 KB Correct
3 Correct 0 ms 348 KB Correct
4 Correct 22 ms 604 KB Correct
5 Correct 23 ms 604 KB Correct
6 Correct 1 ms 348 KB Correct
7 Correct 0 ms 348 KB Correct
8 Correct 5 ms 348 KB Correct
9 Correct 0 ms 348 KB Correct

Subtask #2
0.0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Correct
2 Incorrect 22 ms 604 KB Unexpected end of file - int32 expected
3 Halted 0 ms 0 KB -

Subtask #3
0.0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Correct
2 Correct 0 ms 348 KB Correct
3 Incorrect 1 ms 348 KB Unexpected end of file - int32 expected
4 Halted 0 ms 0 KB -

Subtask #4
0.0 / 27.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Correct
2 Correct 25 ms 868 KB Correct
3 Correct 54 ms 1616 KB Correct
4 Correct 51 ms 1476 KB Correct
5 Correct 51 ms 1620 KB Correct
6 Correct 49 ms 1616 KB Correct
7 Correct 49 ms 1620 KB Correct
8 Correct 51 ms 1460 KB Correct
9 Correct 51 ms 1616 KB Correct
10 Correct 50 ms 1616 KB Correct
11 Correct 51 ms 1628 KB Correct
12 Correct 0 ms 344 KB Correct
13 Correct 0 ms 348 KB Correct
14 Correct 25 ms 1088 KB Correct
15 Correct 25 ms 1116 KB Correct
16 Correct 25 ms 1104 KB Correct
17 Correct 24 ms 1628 KB Correct
18 Correct 27 ms 1628 KB Correct
19 Correct 30 ms 1616 KB Correct
20 Correct 42 ms 1628 KB Correct
21 Correct 42 ms 1456 KB Correct
22 Correct 40 ms 1616 KB Correct
23 Incorrect 39 ms 1616 KB User solution is worse than jury's solution
24 Halted 0 ms 0 KB -

Subtask #5
0.0 / 47.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Correct
2 Correct 0 ms 348 KB Correct
3 Correct 19 ms 604 KB Correct
4 Correct 0 ms 348 KB Correct
5 Correct 22 ms 604 KB Correct
6 Correct 23 ms 604 KB Correct
7 Correct 1 ms 348 KB Correct
8 Correct 0 ms 348 KB Correct
9 Correct 5 ms 348 KB Correct
10 Correct 0 ms 348 KB Correct
11 Incorrect 22 ms 604 KB Unexpected end of file - int32 expected
12 Halted 0 ms 0 KB -