oj.uz

Submission #1071607

# Submission time Handle Problem Language Result Execution time Memory
1071607 2024-08-23T09:17:33 Z 정희우(#11139) Cultivation (JOI17_cultivation) C++17
30 / 100
 18 ms 1500 KB 
#include<iostream>
#include<algorithm>
#include<vector>

using namespace std;
using lint = long long;
using vint = vector<int>;
using pii = pair<int,int>;

const int MAX_N=310;
const int INF=2.01e+9;

int n,mx,my;
pii pos[MAX_N];
int xa[MAX_N],ya[MAX_N];
vint xsum;

struct Seg
{
    int lm,rm,tm;
    int lv,rv;
    void init()
    {
        lm=rm=tm=lv=rv=0;
    }
    void init2()
    {
        lm=rm=tm=0;
        lv=-1;rv=my+1;
    }
    void operator += (const Seg &o)
    {
        lm=max(lm,o.lm);
        rm=max(rm,o.rm);
        tm=max(tm,o.tm);
        if(rv==0 && o.lv==my)
            tm=INF;
        else if(rv==0)
            lm=max(lm,o.lv-rv);
        else if(o.lv==my)
            rm=max(rm,o.lv-rv);
        else
            tm=max(tm,o.lv-rv);
        if(lv==-1)lv=o.lv;
        rv=o.rv;
    }
    Seg operator + (const Seg &o)
    {
        Seg ret;
        ret.lm=max(lm,o.lm);
        ret.rm=max(rm,o.rm);
        ret.tm=max(tm,o.tm);
        return ret;
    }
};
Seg seg[MAX_N<<4];

void update_lazy(int i)
{
    if(seg[i].lv==-1)return;
    seg[i<<1]+=seg[i];
    seg[i<<1|1]+=seg[i];
    seg[i].init2();
}

void init_(int i,int s,int e)
{
    seg[i].init2();
    if(s+1==e)
    {
        seg[i].init();
        return;
    }
    init_(i<<1,s,(s+e)>>1);
    init_(i<<1|1,(s+e)>>1,e);
}

void update_(int i,int s,int e,int l,int r,Seg v)
{
    if(s>=r || e<=l)return;
    if(l<=s && e<=r)
    {
        seg[i]+=v;
        return;
    }
    update_lazy(i);
    update_(i<<1,s,(s+e)>>1,l,r,v);
    update_(i<<1|1,(s+e)>>1,e,l,r,v);
}

void fillup(int i,int s,int e)
{
    if(s+1==e)return;
    update_lazy(i);
    fillup(i<<1,s,(s+e)>>1);
    fillup(i<<1|1,(s+e)>>1,e);
    seg[i]=seg[i<<1]+seg[i<<1|1];
}

Seg find_(int i,int s,int e,int l,int r)
{
    if(s>=r || e<=l)return {0,0,0,0,0};
    if(l<=s && e<=r)return seg[i];
    return find_(i<<1,s,(s+e)>>1,l,r)+find_(i<<1|1,(s+e)>>1,e,l,r);
}

int calc(int dx)
{
    vint px;
    for(int i=0;i<n;i++)
    {
        px.push_back(xa[i]);
        px.push_back(xa[i]-1);
        px.push_back(xa[i]+dx);
        px.push_back(xa[i]+dx+1);
    }
    sort(px.begin(),px.end());
    px.resize(unique(px.begin(),px.end())-px.begin());
    int pn=px.size();
    init_(1,0,pn);
    for(int i=0;i<n;i++)
    {
        int l=lower_bound(px.begin(),px.end(),xa[i])-px.begin();
        int r=upper_bound(px.begin(),px.end(),xa[i]+dx)-px.begin();
        update_(1,0,pn,l,r,{0,0,0,ya[i]-1,ya[i]});
    }
    update_(1,0,pn,0,pn,{0,0,0,my,my+1});
    fillup(1,0,pn);
    int ret=INF;
    for(auto x : px)
    {
        if(x>1+dx)break;
        int l=lower_bound(px.begin(),px.end(),x)-px.begin();
        int r=upper_bound(px.begin(),px.end(),x+mx-1)-px.begin();
        Seg v=find_(1,0,pn,l,r);
        ret=min(ret,max(v.lm+v.rm,v.tm));
    }
    return ret;
}

int main()
{
    ios::sync_with_stdio(0),cin.tie(0),cout.tie(0);
    cin >> mx >> my >> n;
    for(int i=0;i<n;i++)
        cin >> pos[i].second >> pos[i].first;
    sort(pos,pos+n);
    for(int i=0;i<n;i++)
    {
        xa[i]=pos[i].second;
        ya[i]=pos[i].first;
    }
    for(int i=0;i<n;i++)
        for(int j=0;j<n;j++)
        {
            xsum.push_back(max(0,xa[i]-xa[j]-1));
            xsum.push_back(mx-xa[i]+xa[j]-1);
        }
    sort(xsum.begin(),xsum.end());
    xsum.resize(unique(xsum.begin(),xsum.end())-xsum.begin());
    int ans=INF;
    for(auto dx : xsum)
        ans=min(ans,calc(dx)+dx);
    cout << ans << '\n';
    return 0;
}

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 344 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 344 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 344 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 344 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 0 ms 344 KB Output is correct
18 Correct 2 ms 564 KB Output is correct
19 Correct 1 ms 344 KB Output is correct
20 Correct 1 ms 348 KB Output is correct
21 Correct 1 ms 348 KB Output is correct
22 Correct 5 ms 604 KB Output is correct
23 Correct 1 ms 348 KB Output is correct
24 Correct 7 ms 992 KB Output is correct
25 Correct 5 ms 860 KB Output is correct
26 Correct 11 ms 1500 KB Output is correct
27 Correct 12 ms 1500 KB Output is correct
28 Correct 7 ms 992 KB Output is correct
29 Correct 11 ms 1500 KB Output is correct
30 Correct 14 ms 1500 KB Output is correct
31 Correct 11 ms 1500 KB Output is correct
32 Correct 16 ms 1500 KB Output is correct

Subtask #3
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 344 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 344 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 0 ms 344 KB Output is correct
18 Correct 2 ms 564 KB Output is correct
19 Correct 1 ms 344 KB Output is correct
20 Correct 1 ms 348 KB Output is correct
21 Correct 1 ms 348 KB Output is correct
22 Correct 5 ms 604 KB Output is correct
23 Correct 1 ms 348 KB Output is correct
24 Correct 7 ms 992 KB Output is correct
25 Correct 5 ms 860 KB Output is correct
26 Correct 11 ms 1500 KB Output is correct
27 Correct 12 ms 1500 KB Output is correct
28 Correct 7 ms 992 KB Output is correct
29 Correct 11 ms 1500 KB Output is correct
30 Correct 14 ms 1500 KB Output is correct
31 Correct 11 ms 1500 KB Output is correct
32 Correct 16 ms 1500 KB Output is correct
33 Correct 4 ms 1496 KB Output is correct
34 Correct 9 ms 1500 KB Output is correct
35 Correct 18 ms 1500 KB Output is correct
36 Correct 13 ms 1496 KB Output is correct
37 Correct 15 ms 1500 KB Output is correct
38 Correct 12 ms 1500 KB Output is correct
39 Correct 17 ms 1500 KB Output is correct
40 Correct 17 ms 1496 KB Output is correct
41 Correct 10 ms 1500 KB Output is correct
42 Correct 15 ms 1500 KB Output is correct
43 Correct 11 ms 1500 KB Output is correct
44 Correct 12 ms 1500 KB Output is correct

Subtask #4
0 / 30.0

# Verdict Execution time Memory Grader output
1 Incorrect 3 ms 348 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #5
0 / 20.0

# Verdict Execution time Memory Grader output
1 Incorrect 3 ms 348 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #6
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 344 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 344 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 0 ms 344 KB Output is correct
18 Correct 2 ms 564 KB Output is correct
19 Correct 1 ms 344 KB Output is correct
20 Correct 1 ms 348 KB Output is correct
21 Correct 1 ms 348 KB Output is correct
22 Correct 5 ms 604 KB Output is correct
23 Correct 1 ms 348 KB Output is correct
24 Correct 7 ms 992 KB Output is correct
25 Correct 5 ms 860 KB Output is correct
26 Correct 11 ms 1500 KB Output is correct
27 Correct 12 ms 1500 KB Output is correct
28 Correct 7 ms 992 KB Output is correct
29 Correct 11 ms 1500 KB Output is correct
30 Correct 14 ms 1500 KB Output is correct
31 Correct 11 ms 1500 KB Output is correct
32 Correct 16 ms 1500 KB Output is correct
33 Correct 4 ms 1496 KB Output is correct
34 Correct 9 ms 1500 KB Output is correct
35 Correct 18 ms 1500 KB Output is correct
36 Correct 13 ms 1496 KB Output is correct
37 Correct 15 ms 1500 KB Output is correct
38 Correct 12 ms 1500 KB Output is correct
39 Correct 17 ms 1500 KB Output is correct
40 Correct 17 ms 1496 KB Output is correct
41 Correct 10 ms 1500 KB Output is correct
42 Correct 15 ms 1500 KB Output is correct
43 Correct 11 ms 1500 KB Output is correct
44 Correct 12 ms 1500 KB Output is correct
45 Incorrect 3 ms 348 KB Output isn't correct
46 Halted 0 ms 0 KB -