oj.uz

Submission #987804

# Submission time Handle Problem Language Result Execution time Memory
987804 2024-05-23T15:38:32 Z alexdd Park (BOI16_park) C++17
100 / 100
 505 ms 1976 KB 
#include<bits/stdc++.h>
using namespace std;
#define int long long
const int INF = 2e9;
int n,m,h,w;
pair<int,int> t[2005];
int tr[2005];
bool visited[2005];
bool atinge(pair<int,int> p, int r, int margine)
{
    if(margine==1)
    {
        return (h-p.second)<r;
    }
    else if(margine==2)
    {
        return (w-p.first)<r;
    }
    else if(margine==3)
    {
        return p.second<r;
    }
    else
    {
        return p.first<r;
    }
}
int calc_dist(pair<int,int> x, pair<int,int> y)
{
    return (x.first-y.first)*(x.first-y.first) + (x.second-y.second)*(x.second-y.second);
}
void dfs(int x, int r)
{
    visited[x]=1;
    for(int i=1;i<=n;i++)
        if(!visited[i] && calc_dist(t[x],t[i]) < (tr[x]+tr[i]+2*r)*(tr[x]+tr[i]+2*r))
            dfs(i,r);
}
bool verif(int from, int to, int r)
{
    for(int i=1;i<=n;i++)
        visited[i]=0;
    for(int i=1;i<=n;i++)
        if(!visited[i] && atinge(t[i],2*r+tr[i],from))
            dfs(i,r);
    for(int i=1;i<=n;i++)
        if(visited[i] && atinge(t[i],2*r+tr[i],to))
            return 1;
    return 0;
}
int lim[5][5],rez[5][5];
signed main()
{
    ios_base::sync_with_stdio(0);cin.tie(0);
    cin>>n>>m>>w>>h;
    for(int i=1;i<=n;i++)
    {
        cin>>t[i].first>>t[i].second>>tr[i];
    }
    for(int from=1;from<=4;from++)
    {
        for(int to=from+1;to<=4;to++)
        {
            if(verif(from,to,0))
            {
                lim[from][to]=-1;
                continue;
            }
            int st,dr,ans;
            st=0;
            dr=INF;
            ans=0;
            while(st<=dr)
            {
                int mij=(st+dr)/2;
                if(!verif(from,to,mij))
                {
                    ans=mij;
                    st=mij+1;
                }
                else
                    dr=mij-1;
            }
            lim[from][to] = lim[to][from] = ans;
            //cout<<from<<" "<<to<<"   "<<lim[from][to]<<" lim\n";
        }
    }
    rez[1][2] = rez[2][1] = min({lim[1][3],lim[4][3],lim[2][3]});
    rez[1][3] = rez[3][1] = min({lim[3][4],lim[1][3],lim[1][2],lim[2][4]});
    rez[1][4] = rez[4][1] = min({lim[2][4],lim[4][1],lim[4][3]});
    rez[2][3] = rez[3][2] = min({lim[2][4],lim[3][2],lim[1][2]});
    rez[2][4] = rez[4][2] = min({lim[1][3],lim[2][4],lim[1][4],lim[2][3]});
    rez[3][4] = rez[4][3] = min({lim[1][3],lim[4][1],lim[1][2]});
    int qe,qr;
    while(m--)
    {
        cin>>qr>>qe;
        for(int i=1;i<=4;i++)
            if(i==qe || rez[qe][i]>=qr)
                cout<<i;
        cout<<"\n";
    }
    return 0;
}
/**
5 3
16 11
11 8 1
6 10 1
7 3 2
10 4 1
15 5 1
1 1
2 2
2 1

*/

Subtask #1
27.0 / 27.0

# Verdict Execution time Memory Grader output
1 Correct 462 ms 604 KB Output is correct
2 Correct 505 ms 688 KB Output is correct
3 Correct 376 ms 688 KB Output is correct
4 Correct 486 ms 692 KB Output is correct
5 Correct 434 ms 848 KB Output is correct
6 Correct 355 ms 692 KB Output is correct
7 Correct 308 ms 684 KB Output is correct
8 Correct 258 ms 472 KB Output is correct
9 Correct 1 ms 348 KB Output is correct
10 Correct 1 ms 456 KB Output is correct

Subtask #2
31.0 / 31.0

# Verdict Execution time Memory Grader output
1 Correct 31 ms 1364 KB Output is correct
2 Correct 34 ms 1608 KB Output is correct
3 Correct 29 ms 1364 KB Output is correct
4 Correct 29 ms 1476 KB Output is correct
5 Correct 29 ms 1508 KB Output is correct
6 Correct 29 ms 1392 KB Output is correct
7 Correct 23 ms 1880 KB Output is correct
8 Correct 29 ms 1688 KB Output is correct

Subtask #3
42.0 / 42.0

# Verdict Execution time Memory Grader output
1 Correct 462 ms 604 KB Output is correct
2 Correct 505 ms 688 KB Output is correct
3 Correct 376 ms 688 KB Output is correct
4 Correct 486 ms 692 KB Output is correct
5 Correct 434 ms 848 KB Output is correct
6 Correct 355 ms 692 KB Output is correct
7 Correct 308 ms 684 KB Output is correct
8 Correct 258 ms 472 KB Output is correct
9 Correct 1 ms 348 KB Output is correct
10 Correct 1 ms 456 KB Output is correct
11 Correct 31 ms 1364 KB Output is correct
12 Correct 34 ms 1608 KB Output is correct
13 Correct 29 ms 1364 KB Output is correct
14 Correct 29 ms 1476 KB Output is correct
15 Correct 29 ms 1508 KB Output is correct
16 Correct 29 ms 1392 KB Output is correct
17 Correct 23 ms 1880 KB Output is correct
18 Correct 29 ms 1688 KB Output is correct
19 Correct 424 ms 1872 KB Output is correct
20 Correct 392 ms 1920 KB Output is correct
21 Correct 401 ms 1824 KB Output is correct
22 Correct 451 ms 1976 KB Output is correct
23 Correct 433 ms 1900 KB Output is correct
24 Correct 306 ms 1900 KB Output is correct