oj.uz

답안 #299544

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
299544 2020-09-15T07:15:03 Z gs18115 Archery (IOI09_archery) C++14
94 / 100
 1092 ms 11064 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;
const int mx=200010;
struct seg
{
    struct node
    {
        int sum;
        int mxl;
        node(int v=0):sum(v),mxl(v){}
        node(int sum,int mxl):sum(sum),mxl(mxl){}
        node operator+(const node&x)
        {
            return node(sum+x.sum,max(mxl,sum+x.mxl));
        }
    }t[mx*4];
    void init(int n,int s,int e,vector<int>&v)
    {
        if(s==e)
        {
            t[n]=node(v[s]);
            return;
        }
        int m=s+(e-s)/2;
        init(n*2,s,m,v);
        init(n*2+1,m+1,e,v);
        t[n]=t[n*2]+t[n*2+1];
        return;
    }
    int query(int n,int s,int e,int S,int E,int lft)
    {
        if(s>E||S>e)
            return 0;
        if(S<=s&&e<=E&&t[n].mxl+lft<0)
            return t[n].sum+lft;
        if(s==e)
            return s;
        int m=s+(e-s)/2;
        int lf=query(n*2,s,m,S,E,lft);
        if(lf>0)
            return lf;
        return query(n*2+1,m+1,e,S,E,lf);
    }
}st;
int main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
    int n,r;
    cin>>n>>r;
    r=(r-n*2)%n+n*2;
    int s;
    cin>>s;
    vector<int>v(n*2-1);
    for(int&t:v)
    {
        cin>>t;
        t=t>s?1:0;
    }
    vector<int>memo(n+1,inf);
    auto getpos=[&](int start)->int
    {
        if(s==1)
            return 1;
        if(memo[start]!=inf)
            return memo[start];
        vector<int>cnt(n+1,0);
        for(int i=1;i<start;i++)
            cnt[i]=v[i*2-2]+v[i*2-1]-1;
        cnt[start]=v[start*2-2]-1;
        for(int i=start;i++<n;)
            cnt[i]=v[i*2-3]+v[i*2-2]-1;
        vector<int>tm(n+1,inf);
        for(int i=0;i++<n;)
        {
            if(cnt[i]<(i==start?1:2))
            {
                tm[1]=i-1;
                break;
            }
        }
        st.init(1,1,n,cnt);
        for(int i=1;i++<n;)
        {
            int fi=st.query(1,1,n,i,n,0);
            if(fi>0)
                tm[i]=fi-i;
            else
            {
                int se=st.query(1,1,n,1,i-1,fi+1);
                if(se>0)
                {
                    tm[i]=n-i+se;
                    if(se<=tm[1])
                        tm[i]++;
                }
            }
        }
        int cur=start,cc=start;
        for(int t=0;t<r;t++)
        {
            if(t>=tm[cc])
                cur--,cc--;
            if(cc==0)
                cc=n;
        }
        return memo[start]=cur;
    };
    {
        int pos=getpos(n);
        while((pos-1)%n!=0)
            pos--;
        int s=1,e=n;
        while(s<e)
        {
            int m=s+(e-s)/2;
            if(getpos(m)<pos)
                s=m+1;
            else
                e=m;
        }
        pos=getpos(s);
        e=n;
        for(int i=s;i++<n;)
            if(memo[i]!=inf&&memo[i]>pos)
                e=min(e,i-1);
        for(int i=s;i++<n;)
            if(memo[i]==pos)
                s=i;
        while(s<e)
        {
            int m=s+(e-s+1)/2;
            if(getpos(m)==pos)
                s=m;
            else
                e=m-1;
        }
        cout<<s<<endl;
    }
    return 0;
}

Subtask #1
6.0 / 6.0

# 결과 실행 시간 메모리 Grader output
1 Correct 5 ms 6528 KB Output is correct
2 Correct 5 ms 6656 KB Output is correct
3 Correct 5 ms 6528 KB Output is correct
4 Correct 11 ms 6784 KB Output is correct
5 Correct 5 ms 6528 KB Output is correct
6 Correct 5 ms 6528 KB Output is correct

Subtask #2
88.0 / 94.0

# 결과 실행 시간 메모리 Grader output
1 Correct 5 ms 6528 KB Output is correct
2 Correct 5 ms 6528 KB Output is correct
3 Correct 8 ms 6784 KB Output is correct
4 Correct 51 ms 6912 KB Output is correct
5 Correct 643 ms 10092 KB Output is correct
6 Correct 5 ms 6528 KB Output is correct
7 Incorrect 7 ms 6656 KB Output isn't correct
8 Incorrect 38 ms 6912 KB Output isn't correct
9 Correct 68 ms 7060 KB Output is correct
10 Incorrect 7 ms 6656 KB Output isn't correct
11 Correct 71 ms 7064 KB Output is correct
12 Correct 14 ms 6656 KB Output is correct
13 Correct 839 ms 9560 KB Output is correct
14 Correct 18 ms 6656 KB Output is correct
15 Correct 128 ms 7280 KB Output is correct
16 Correct 5 ms 6528 KB Output is correct
17 Correct 8 ms 6656 KB Output is correct
18 Correct 12 ms 6784 KB Output is correct
19 Correct 12 ms 6784 KB Output is correct
20 Correct 15 ms 6656 KB Output is correct
21 Correct 90 ms 7168 KB Output is correct
22 Correct 103 ms 7408 KB Output is correct
23 Correct 1092 ms 10412 KB Output is correct
24 Correct 6 ms 6656 KB Output is correct
25 Correct 7 ms 6656 KB Output is correct
26 Correct 18 ms 6784 KB Output is correct
27 Correct 73 ms 7128 KB Output is correct
28 Correct 772 ms 9340 KB Output is correct
29 Correct 8 ms 6656 KB Output is correct
30 Correct 20 ms 6656 KB Output is correct
31 Correct 71 ms 7168 KB Output is correct
32 Correct 811 ms 10144 KB Output is correct
33 Correct 5 ms 6784 KB Output is correct
34 Correct 5 ms 6528 KB Output is correct
35 Correct 10 ms 6784 KB Output is correct
36 Correct 10 ms 6656 KB Output is correct
37 Correct 78 ms 6988 KB Output is correct
38 Correct 91 ms 7196 KB Output is correct
39 Correct 5 ms 6528 KB Output is correct
40 Correct 7 ms 6656 KB Output is correct
41 Correct 9 ms 6656 KB Output is correct
42 Correct 10 ms 6656 KB Output is correct
43 Correct 21 ms 6656 KB Output is correct
44 Correct 41 ms 6784 KB Output is correct
45 Correct 84 ms 7052 KB Output is correct
46 Correct 73 ms 7112 KB Output is correct
47 Correct 966 ms 11064 KB Output is correct