oj.uz

답안 #305612

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
305612 2020-09-23T16:54:22 Z baluteshih 식물 비교 (IOI20_plants) C++14
44 / 100
 1884 ms 73068 KB 
#include "plants.h"
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef pair<int,int> pii;
typedef pair<ll,ll> pll;
#define X first
#define Y second
#define ALL(v) v.begin(),v.end()
#define SZ(a) ((int)a.size())
#define pb push_back

const int INF=1e9;
int Rtr[200005][20],Ltr[200005][20];
pii seg3[1600005],seg4[1600005];
int seg1[800005],seg2[800005],lazy1[800005],lazy2[800005];
int layer[400005];
vector<int> store[200005];

void build(int l,int r,int rt,const vector<int> &v,int *seg)
{
    if(l==r)
        return seg[rt]=v[l],void();
    int mid=(l+r)>>1;
    build(l,mid,rt<<1,v,seg),build(mid+1,r,rt<<1|1,v,seg);
    seg[rt]=min(seg[rt<<1],seg[rt<<1|1]);
}

void down(int rt,int *seg,int *lazy)
{
    if(lazy[rt])
    {
        seg[rt<<1]+=lazy[rt],lazy[rt<<1]+=lazy[rt];
        seg[rt<<1|1]+=lazy[rt],lazy[rt<<1|1]+=lazy[rt];
        lazy[rt]=0;
    }
}

void modify(int L,int R,int l,int r,int rt,int val,int *seg,int *lazy)
{
    if(l!=r) down(rt,seg,lazy);
    if(L<=l&&R>=r)
        return lazy[rt]+=val,seg[rt]+=val,void();
    int mid=(l+r)>>1;
    if(L<=mid)
        modify(L,R,l,mid,rt<<1,val,seg,lazy);
    if(R>mid)
        modify(L,R,mid+1,r,rt<<1|1,val,seg,lazy);
    seg[rt]=min(seg[rt<<1],seg[rt<<1|1]);
}

int query(int l,int r,int rt,int *seg,int *lazy)
{
    if(l!=r) down(rt,seg,lazy);
    if(l==r)
        return l;
    int mid=(l+r)>>1;
    if(seg[rt<<1]<=seg[rt<<1|1])
        return query(l,mid,rt<<1,seg,lazy);
    return query(mid+1,r,rt<<1|1,seg,lazy);
}

void dfs(int l,int r,int rt,int *seg,int *lazy,vector<int> &rst)
{
    if(l!=r) down(rt,seg,lazy);
    if(l==r)
        return rst.pb(l);
    int mid=(l+r)>>1;
    if(seg[rt<<1]==0)
        dfs(l,mid,rt<<1,seg,lazy,rst);
    if(seg[rt<<1|1]==0)
        dfs(mid+1,r,rt<<1|1,seg,lazy,rst);
}

void build3(int l,int r,int rt)
{
    seg3[rt]=pii(INF,l);
    if(l==r)
        return;
    int mid=(l+r)>>1;
    build3(l,mid,rt<<1),build3(mid+1,r,rt<<1|1);
}

void build4(int l,int r,int rt)
{
    seg4[rt]=pii(INF,-r);
    if(l==r)
        return;
    int mid=(l+r)>>1;
    build4(l,mid,rt<<1),build4(mid+1,r,rt<<1|1);
}

void modify3(int x,int l,int r,int rt,int val)
{
    if(l==r)
        return seg3[rt]=pii(val,l),void();
    int mid=(l+r)>>1;
    if(x<=mid)
        modify3(x,l,mid,rt<<1,val);
    else
        modify3(x,mid+1,r,rt<<1|1,val);
    seg3[rt]=min(seg3[rt<<1],seg3[rt<<1|1]);
}

void modify4(int x,int l,int r,int rt,int val)
{
    if(l==r)
        return seg4[rt]=pii(val,-r),void();
    int mid=(l+r)>>1;
    if(x<=mid)
        modify4(x,l,mid,rt<<1,val);
    else
        modify4(x,mid+1,r,rt<<1|1,val);
    seg4[rt]=min(seg4[rt<<1],seg4[rt<<1|1]);
}

pii query2(int L,int R,int l,int r,int rt,pii *seg)
{
    if(L<=l&&R>=r)
        return seg[rt];
    int mid=(l+r)>>1;
    if(R<=mid)
        return query2(L,R,l,mid,rt<<1,seg);
    if(L>mid)
        return query2(L,R,mid+1,r,rt<<1|1,seg);
    return min(query2(L,R,l,mid,rt<<1,seg),query2(L,R,mid+1,r,rt<<1|1,seg));
}

int arr[200005],K,n,L;

void init(int k, vector<int> r)
{
    n=SZ(r),K=k,L=__lg(n);
    int ly=0;
	build(0,n-1,1,r,seg1),build(0,n-1,1,vector<int>(n,INF),seg2);
    for(int i=0;i<n;++ly)
    {
        while(seg1[1]==0)
        {
            int u=query(0,n-1,1,seg1,lazy1);
            modify(u,u,0,n-1,1,INF,seg1,lazy1),modify(u,u,0,n-1,1,-INF,seg2,lazy2);
            if(u+k<=n)
                modify(u+1,u+k-1,0,n-1,1,1,seg2,lazy2);
            else
            {
                if(u<n-1)
                    modify(u+1,n-1,0,n-1,1,1,seg2,lazy2);
                modify(0,k-n+u-1,0,n-1,1,1,seg2,lazy2);
            }
        }
        vector<int> rst;
        dfs(0,n-1,1,seg2,lazy2,rst);
        for(int u:rst)
        {
            if(u>=k-1)
                modify(u-k+1,u,0,n-1,1,-1,seg1,lazy1);
            else
                modify(0,u,0,n-1,1,-1,seg1,lazy1),modify(n-(k-u-1),n-1,0,n-1,1,-1,seg1,lazy1);
            if(u+k<=n)
                modify(u+1,u+k-1,0,n-1,1,-1,seg2,lazy2);
            else
            {
                if(u<n-1)
                    modify(u+1,n-1,0,n-1,1,-1,seg2,lazy2);
                modify(0,k-n+u-1,0,n-1,1,-1,seg2,lazy2);
            }
            modify(u,u,0,n-1,1,INF,seg2,lazy2);
            layer[u]=ly;
        }
        i+=SZ(rst),store[ly].swap(rst);
    }
    for(int i=0;i<n;++i)
        layer[i+n]=layer[i];
    build3(0,2*n-1,1),build4(0,2*n-1,1);
    for(int i=ly-1;i>=0;--i)
    {
        for(int u:store[i])
        {
            pii tmp=query2(u+n-k+1,u+n,0,2*n-1,1,seg3);
            if(tmp.X==INF)
                Ltr[u][0]=u;
            else 
                Ltr[u][0]=tmp.Y%n;
            tmp=query2(u,u+k-1,0,2*n-1,1,seg4);
            if(tmp.X==INF)
                Rtr[u][0]=u;
            else
                Rtr[u][0]=(-tmp.Y)%n;
        }
        for(int u:store[i])
            modify3(u,0,2*n-1,1,layer[u]),modify3(u+n,0,2*n-1,1,layer[u]),
            modify4(u,0,2*n-1,1,layer[u]),modify4(u+n,0,2*n-1,1,layer[u]);
    }
    for(int t=1;t<=L;++t)
        for(int i=0;i<n;++i)
            Ltr[i][t]=Ltr[Ltr[i][t-1]][t-1],Rtr[i][t]=Rtr[Rtr[i][t-1]][t-1];
    /*cout << "layer: ";
    for(int i=0;i<n;++i)
        cout << layer[i] << " ";
    cout << endl;
    cout << "Ltr: ";
    for(int i=0;i<n;++i)
        cout << Ltr[i][0] << " ";
    cout << endl;
    cout << "Rtr: ";
    for(int i=0;i<n;++i)
        cout << Rtr[i][0] << " ";
    cout << endl;*/
}

int compare_plants(int x, int y)
{
    if(layer[x]==layer[y]) return 0;
    int rt=1,tar,nw,tmp;
    if(layer[x]>layer[y])
        swap(x,y),rt=-1;
    if(x>y)
        tar=y+n;
    else
        tar=y;
    nw=x,tmp=nw;
    if(nw<x) tmp+=n;
    if(tmp+K>tar)
        return rt;
    for(int i=L;i>=0;--i)
    {
        tmp=Rtr[nw][i];
        if(tmp<x) tmp+=n;
        if(tmp+K<=tar)
            nw=Rtr[nw][i];
    }
    nw=Rtr[nw][0],tmp=nw;
    if(nw<x) tmp+=n;
    if(layer[y]>layer[nw]&&tmp+K>tar)
        return rt;
    if(x<y)
        tar=y-n;
    else
        tar=y;
    nw=x,tmp=nw;
    if(nw>x) tmp-=n;
    if(tmp-K<tar)
        return rt;
    for(int i=L;i>=0;--i)
    {
        int tmp=Ltr[nw][i];
        if(tmp>x) tmp-=n;
        if(tmp-K>=tar)
            nw=Ltr[nw][i];
    }
    nw=Ltr[nw][0],tmp=nw;
    if(nw>x) tmp-=n;
    if(layer[y]>layer[nw]&&tmp-K<tar)
        return rt;
    return rt;
}

Subtask #1
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 5120 KB Output is correct
2 Correct 4 ms 5120 KB Output is correct
3 Correct 4 ms 5120 KB Output is correct
4 Incorrect 4 ms 5120 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #2
14.0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 5120 KB Output is correct
2 Correct 4 ms 5120 KB Output is correct
3 Correct 4 ms 5120 KB Output is correct
4 Correct 4 ms 5120 KB Output is correct
5 Correct 4 ms 5120 KB Output is correct
6 Correct 9 ms 5504 KB Output is correct
7 Correct 103 ms 9720 KB Output is correct
8 Correct 6 ms 5120 KB Output is correct
9 Correct 9 ms 5504 KB Output is correct
10 Correct 99 ms 9976 KB Output is correct
11 Correct 95 ms 9592 KB Output is correct
12 Correct 92 ms 9848 KB Output is correct
13 Correct 98 ms 9720 KB Output is correct

Subtask #3
13.0 / 13.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 5120 KB Output is correct
2 Correct 4 ms 5120 KB Output is correct
3 Correct 4 ms 5120 KB Output is correct
4 Correct 4 ms 5120 KB Output is correct
5 Correct 4 ms 5120 KB Output is correct
6 Correct 9 ms 5504 KB Output is correct
7 Correct 103 ms 9720 KB Output is correct
8 Correct 6 ms 5120 KB Output is correct
9 Correct 9 ms 5504 KB Output is correct
10 Correct 99 ms 9976 KB Output is correct
11 Correct 95 ms 9592 KB Output is correct
12 Correct 92 ms 9848 KB Output is correct
13 Correct 98 ms 9720 KB Output is correct
14 Correct 201 ms 15076 KB Output is correct
15 Correct 1880 ms 72876 KB Output is correct
16 Correct 195 ms 15096 KB Output is correct
17 Correct 1884 ms 72804 KB Output is correct
18 Correct 1127 ms 72788 KB Output is correct
19 Correct 1117 ms 72884 KB Output is correct
20 Correct 1730 ms 73068 KB Output is correct

Subtask #4
17.0 / 17.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 5120 KB Output is correct
2 Correct 4 ms 5120 KB Output is correct
3 Correct 79 ms 8440 KB Output is correct
4 Correct 883 ms 70376 KB Output is correct
5 Correct 1101 ms 68072 KB Output is correct
6 Correct 1564 ms 69384 KB Output is correct
7 Correct 1752 ms 69864 KB Output is correct
8 Correct 1829 ms 72456 KB Output is correct
9 Correct 935 ms 68072 KB Output is correct
10 Correct 941 ms 71652 KB Output is correct
11 Correct 781 ms 71944 KB Output is correct
12 Correct 911 ms 72860 KB Output is correct
13 Correct 1130 ms 72968 KB Output is correct

Subtask #5
0 / 11.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 5120 KB Output is correct
2 Correct 4 ms 5120 KB Output is correct
3 Incorrect 4 ms 5120 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #6
0 / 15.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 5120 KB Output is correct
2 Correct 4 ms 5120 KB Output is correct
3 Incorrect 4 ms 5120 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #7
0 / 25.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 5120 KB Output is correct
2 Correct 4 ms 5120 KB Output is correct
3 Correct 4 ms 5120 KB Output is correct
4 Incorrect 4 ms 5120 KB Output isn't correct
5 Halted 0 ms 0 KB -