oj.uz

Submission #473036

# Submission time Handle Problem Language Result Execution time Memory
473036 2021-09-14T18:52:53 Z nicolaalexandra Watching (JOI13_watching) C++14
50 / 100
 1000 ms 45804 KB 
#include <bits/stdc++.h>
#define DIM 2010
#define INF 1000000000
using namespace std;

struct idk{
    int poz,p,q;
};
deque <idk> c;
int v[DIM];
map <pair<int,pair<int,int> >, int> viz;
int n,p,q,i;

int get_poz (int x){
    int st = 1, dr = n, sol = 0;
    while (st <= dr){
        int mid = (st+dr)>>1;
        if (v[mid] <= x){
            sol = mid;
            st = mid+1;
        } else dr = mid-1;
    }
    return sol;
}

int verif (int val){

    int poz1 = get_poz (v[1] + val - 1);
    int poz2 = get_poz (v[1] + 2 * val - 1);

    c.clear(),viz.clear();
    c.push_back({poz1,p-1,q});
    c.push_back({poz2,p,q-1});

    viz[make_pair(poz1,make_pair(p-1,q))] = 1;
    viz[make_pair(poz2,make_pair(p,q-1))] = 1;
    //viz[poz1][p-1][q] = 1;
    //viz[poz2][p][q-1] = 1;

    while (!c.empty()){
        int poz = c.front().poz;
        int p = c.front().p;
        int q = c.front().q;
        c.pop_front();

        if (poz == n)
            return 1;

        if (p){
            int new_poz = get_poz (v[poz+1] + val - 1);
            if (!viz[make_pair(new_poz,make_pair(p-1,q))]){
                viz[make_pair(new_poz,make_pair(p-1,q))] = 1;
                c.push_back({new_poz,p-1,q});
            }
        }

        if (q){
            int new_poz = get_poz (v[poz+1] + 2 * val - 1);
            if (!viz[make_pair(new_poz,make_pair(p,q-1))]){
                viz[make_pair(new_poz,make_pair(p,q-1))] = 1;
                c.push_back({new_poz,p,q-1});
            }
        }
    }

    return 0;
}

int main (){

    //ifstream cin ("date.in");
    //ofstream cout ("date.out");

    cin>>n>>p>>q;
    for (i=1;i<=n;i++)
        cin>>v[i];

    sort (v+1,v+n+1);
    p = min (p,n), q = min (q,n);

    int st = 0, dr = INF, sol = 0;
    while (st <= dr){
        int mid = (st+dr)>>1;
        if (verif(mid)){
            sol = mid;
            dr = mid-1;
        } else st = mid+1;
    }

    cout<<sol;

    return 0;
}

Subtask #1
50.0 / 50.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 7 ms 412 KB Output is correct
5 Correct 8 ms 332 KB Output is correct
6 Correct 59 ms 1268 KB Output is correct
7 Correct 1 ms 204 KB Output is correct
8 Correct 3 ms 204 KB Output is correct
9 Correct 2 ms 204 KB Output is correct
10 Correct 29 ms 588 KB Output is correct
11 Correct 33 ms 584 KB Output is correct
12 Correct 43 ms 1176 KB Output is correct
13 Correct 1 ms 204 KB Output is correct
14 Correct 1 ms 204 KB Output is correct
15 Correct 1 ms 204 KB Output is correct

Subtask #2
0 / 50.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 204 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Execution timed out 1088 ms 45804 KB Time limit exceeded
4 Halted 0 ms 0 KB -