oj.uz

Submission #1072817

# Submission time Handle Problem Language Result Execution time Memory
1072817 2024-08-24T05:33:19 Z jer033 Sprinklers (CEOI24_sprinklers) C++17
3 / 100
 58 ms 1624 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<=20; 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 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 21 ms 600 KB Correct
3 Correct 0 ms 348 KB Correct
4 Correct 24 ms 604 KB Correct
5 Correct 24 ms 600 KB Correct
6 Correct 0 ms 344 KB Correct
7 Correct 0 ms 348 KB Correct
8 Correct 5 ms 508 KB Correct
9 Correct 0 ms 344 KB Correct

Subtask #2
0.0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Correct
2 Incorrect 26 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 1 ms 344 KB Correct
2 Correct 0 ms 348 KB Correct
3 Incorrect 0 ms 344 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 1 ms 344 KB Correct
2 Correct 27 ms 856 KB Correct
3 Correct 53 ms 1468 KB Correct
4 Correct 57 ms 1472 KB Correct
5 Correct 56 ms 1464 KB Correct
6 Correct 53 ms 1620 KB Correct
7 Correct 52 ms 1620 KB Correct
8 Correct 58 ms 1616 KB Correct
9 Correct 52 ms 1616 KB Correct
10 Correct 55 ms 1620 KB Correct
11 Correct 52 ms 1480 KB Correct
12 Correct 1 ms 348 KB Correct
13 Correct 0 ms 348 KB Correct
14 Correct 26 ms 1112 KB Correct
15 Correct 30 ms 1116 KB Correct
16 Correct 27 ms 1116 KB Correct
17 Correct 25 ms 1624 KB Correct
18 Correct 28 ms 1620 KB Correct
19 Correct 37 ms 1620 KB Correct
20 Correct 48 ms 1472 KB Correct
21 Correct 45 ms 1480 KB Correct
22 Correct 45 ms 1620 KB Correct
23 Incorrect 55 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 1 ms 344 KB Correct
2 Correct 0 ms 348 KB Correct
3 Correct 21 ms 600 KB Correct
4 Correct 0 ms 348 KB Correct
5 Correct 24 ms 604 KB Correct
6 Correct 24 ms 600 KB Correct
7 Correct 0 ms 344 KB Correct
8 Correct 0 ms 348 KB Correct
9 Correct 5 ms 508 KB Correct
10 Correct 0 ms 344 KB Correct
11 Incorrect 26 ms 604 KB Unexpected end of file - int32 expected
12 Halted 0 ms 0 KB -