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답안 #271762

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
271762 2020-08-18T07:28:34 Z 최은수(#5096) Archery (IOI09_archery) C++17
66 / 100
 1022 ms 5984 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+5000000/n,n);i>max(ps-10000000/n,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

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 384 KB Output is correct
2 Incorrect 19 ms 384 KB Output isn't correct
3 Correct 9 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 38 ms 384 KB Output is correct

Subtask #2
62.0 / 94.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 384 KB Output is correct
2 Correct 70 ms 384 KB Output is correct
3 Incorrect 1 ms 384 KB Output isn't correct
4 Incorrect 5 ms 512 KB Output isn't correct
5 Correct 36 ms 1664 KB Output is correct
6 Correct 40 ms 384 KB Output is correct
7 Incorrect 1 ms 384 KB Output isn't correct
8 Incorrect 3 ms 512 KB Output isn't correct
9 Correct 8 ms 512 KB Output is correct
10 Incorrect 1 ms 384 KB Output isn't correct
11 Incorrect 6 ms 512 KB Output isn't correct
12 Incorrect 1 ms 384 KB Output isn't correct
13 Incorrect 24 ms 1280 KB Output isn't correct
14 Incorrect 2 ms 384 KB Output isn't correct
15 Incorrect 8 ms 640 KB Output isn't correct
16 Correct 57 ms 384 KB Output is correct
17 Incorrect 1 ms 384 KB Output isn't correct
18 Incorrect 2 ms 416 KB Output isn't correct
19 Correct 1 ms 384 KB Output is correct
20 Correct 2 ms 384 KB Output is correct
21 Incorrect 5 ms 512 KB Output isn't correct
22 Correct 7 ms 640 KB Output is correct
23 Incorrect 39 ms 1792 KB Output isn't correct
24 Correct 62 ms 384 KB Output is correct
25 Correct 39 ms 384 KB Output is correct
26 Correct 283 ms 536 KB Output is correct
27 Correct 888 ms 1096 KB Output is correct
28 Incorrect 913 ms 4100 KB Output isn't correct
29 Correct 69 ms 384 KB Output is correct
30 Correct 232 ms 528 KB Output is correct
31 Correct 782 ms 1036 KB Output is correct
32 Correct 1022 ms 5528 KB Output is correct
33 Correct 52 ms 384 KB Output is correct
34 Correct 45 ms 384 KB Output is correct
35 Correct 107 ms 384 KB Output is correct
36 Correct 175 ms 504 KB Output is correct
37 Incorrect 664 ms 1024 KB Output isn't correct
38 Correct 696 ms 1200 KB Output is correct
39 Correct 41 ms 384 KB Output is correct
40 Correct 29 ms 428 KB Output is correct
41 Correct 160 ms 452 KB Output is correct
42 Correct 140 ms 468 KB Output is correct
43 Correct 698 ms 532 KB Output is correct
44 Correct 606 ms 796 KB Output is correct
45 Correct 688 ms 968 KB Output is correct
46 Correct 762 ms 1212 KB Output is correct
47 Correct 980 ms 5984 KB Output is correct