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Submission #271755

# Submission time Handle Problem Language Result Execution time Memory
271755 2020-08-18T07:27:13 Z 최은수(#5096) Archery (IOI09_archery) C++17
66 / 100
 890 ms 5976 KB 
#include<iostream>
#include<vector>
#include<algorithm>
#define ep emplace
#define eb emplace_back
#define fi first
#define se second
#define all(x) (x).begin(),(x).end()
using namespace std;
typedef long long ll;
typedef pair<int,int>pi;
typedef pair<ll,ll>pl;
const int inf=1e9+7;
const ll INF=1e18;
bool chk[200010];
int pa[200010];
int n;
int par(int x)
{
    if(!chk[x])
        return x;
    return pa[x]=par(pa[x]);
}
inline void put(int x)
{
    chk[x]=1;
    pa[x]=x==1?n:x-1;
    return;
}
int main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
    int r;
    cin>>n>>r;
    r=(r-n*2)%n+n*2;
    int s;
    cin>>s;
    vector<int>p(n*2-1);
    for(int&t:p)
        cin>>t;
    if(n<=200)
    {
        int mx=inf,mi=-1;
        for(int i=n;i>0;i--)
        {
            vector<pi>v(n+1);
            for(int j=1;j<i;j++)
                v[j]=pi(p[j*2-2],p[j*2-1]);
            v[i]=pi(s,p[i*2-2]);
            for(int j=i;j++<n;)
                v[j]=pi(p[j*2-3],p[j*2-2]);
            for(int j=0;j<r;j++)
            {
                for(int k=1;k++<n;)
                    if(v[k].fi<v[k].se)
                        swap(v[k].fi,v[k].se);
                if(v[1].fi>v[1].se)
                    swap(v[1].fi,v[1].se);
                for(int k=0;k<n;k++)
                    v[k].se=v[k+1].se;
                v[n].se=v[0].se;
            }
            int id=-1;
            for(int j=0;j++<n;)
                if(v[j].fi==s||v[j].se==s)
                    id=j;
            if(id<mx)
                mx=id,mi=i;
        }
        cout<<mi<<endl;
        return 0;
    }
    if(s>1&&s<n+2)
        return cout<<n<<endl,0;
    int mx=inf,mi=-1;
    int ps=-1;
    {
        int i=n;
        vector<pi>v(n+1);
        for(int j=1;j<i;j++)
            v[j]=pi(p[j*2-2],p[j*2-1]);
        v[i]=pi(s,p[i*2-2]);
        for(int j=i;j++<n;)
            v[j]=pi(p[j*2-3],p[j*2-2]);
        vector<int>pos(n*2+1);
        for(int j=0;j++<n;)
            pos[v[j].fi]=pos[v[j].se]=j;
        fill(chk,chk+n+1,0);
        if(s!=1)
        {
            put(pos[1]);
            for(int j=n*2;j>s;put(pos[j--]))
                pos[j]=par(pos[j]);
            pos[s]=par(pos[s]);
        }
        if(pos[s]<mx)
            mx=pos[s],mi=i;
        ps=1;
        while(chk[ps])
            ps++;
    }
    for(int i=min(ps+10,n);i>max(ps-50,0);i--)
    {
        vector<pi>v(n+1);
        for(int j=1;j<i;j++)
            v[j]=pi(p[j*2-2],p[j*2-1]);
        v[i]=pi(s,p[i*2-2]);
        for(int j=i;j++<n;)
            v[j]=pi(p[j*2-3],p[j*2-2]);
        vector<int>pos(n*2+1);
        for(int j=0;j++<n;)
            pos[v[j].fi]=pos[v[j].se]=j;
        fill(chk,chk+n+1,0);
        if(s!=1)
        {
            put(pos[1]);
            for(int j=n*2;j>s;put(pos[j--]))
                pos[j]=par(pos[j]);
            pos[s]=par(pos[s]);
        }
        if(pos[s]<mx)
            mx=pos[s],mi=i;
    }
    cout<<mi<<endl;
    return 0;
}

Subtask #1
4.0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 384 KB Output is correct
2 Incorrect 1 ms 384 KB Output isn't correct
3 Correct 5 ms 384 KB Output is correct
4 Incorrect 1 ms 384 KB Output isn't correct
5 Correct 1 ms 384 KB Output is correct
6 Correct 34 ms 384 KB Output is correct

Subtask #2
62.0 / 94.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 384 KB Output is correct
2 Correct 46 ms 504 KB Output is correct
3 Incorrect 1 ms 384 KB Output isn't correct
4 Incorrect 3 ms 512 KB Output isn't correct
5 Correct 33 ms 1664 KB Output is correct
6 Correct 28 ms 384 KB Output is correct
7 Incorrect 1 ms 384 KB Output isn't correct
8 Incorrect 5 ms 512 KB Output isn't correct
9 Correct 5 ms 544 KB Output is correct
10 Incorrect 1 ms 384 KB Output isn't correct
11 Incorrect 4 ms 512 KB Output isn't correct
12 Incorrect 1 ms 384 KB Output isn't correct
13 Incorrect 23 ms 1280 KB Output isn't correct
14 Incorrect 1 ms 384 KB Output isn't correct
15 Incorrect 7 ms 640 KB Output isn't correct
16 Correct 36 ms 512 KB Output is correct
17 Incorrect 1 ms 384 KB Output isn't correct
18 Incorrect 1 ms 384 KB Output isn't correct
19 Correct 1 ms 384 KB Output is correct
20 Correct 1 ms 384 KB Output is correct
21 Incorrect 4 ms 512 KB Output isn't correct
22 Correct 6 ms 768 KB Output is correct
23 Incorrect 34 ms 1792 KB Output isn't correct
24 Correct 36 ms 384 KB Output is correct
25 Correct 4 ms 512 KB Output is correct
26 Correct 11 ms 640 KB Output is correct
27 Correct 76 ms 1008 KB Output is correct
28 Incorrect 483 ms 4028 KB Output isn't correct
29 Correct 5 ms 384 KB Output is correct
30 Correct 9 ms 512 KB Output is correct
31 Correct 67 ms 984 KB Output is correct
32 Correct 739 ms 5668 KB Output is correct
33 Correct 39 ms 384 KB Output is correct
34 Correct 33 ms 384 KB Output is correct
35 Correct 4 ms 384 KB Output is correct
36 Correct 5 ms 384 KB Output is correct
37 Incorrect 51 ms 1016 KB Output isn't correct
38 Correct 75 ms 1124 KB Output is correct
39 Correct 29 ms 384 KB Output is correct
40 Correct 3 ms 384 KB Output is correct
41 Correct 6 ms 384 KB Output is correct
42 Correct 5 ms 384 KB Output is correct
43 Correct 18 ms 512 KB Output is correct
44 Correct 32 ms 684 KB Output is correct
45 Correct 73 ms 968 KB Output is correct
46 Correct 67 ms 1040 KB Output is correct
47 Correct 890 ms 5976 KB Output is correct