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Submission #1100802

# Submission time Handle Problem Language Result Execution time Memory
1100802 2024-10-14T18:30:32 Z vivkostov Joker (BOI20_joker) C++14
25 / 100
 190 ms 11216 KB 
#include<bits/stdc++.h>
#define endl '\n'
using namespace std;
void speed()
{
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    cout.tie(NULL);
}
struct cell
{
    int a,b,tim;
};
int n,m,q,a[200005],b[200005],l,r,lead[200005],sw[200005],sz[200005],lamp,otg[200005],br;
stack<cell>s;
void prec()
{
    for(int i=1;i<=n;i++)
    {
        lead[i]=i;
        sz[i]=1;
        sw[i]=0;
    }
}
int get_lead(int beg)
{
    if(lead[beg]==beg)return beg;
    return get_lead(lead[beg]);
}
int get_br(int beg,int br)
{
    if(lead[beg]==beg)return br;
    return get_br(lead[beg],br+sw[beg]);
}
void add(int a,int b)
{
    br++;
    int la=get_lead(a);
    int lb=get_lead(b);
    if(la==lb)
    {
        if(get_br(a,0)%2==get_br(b,0)%2)lamp=br;
        return;
    }
    if(sz[la]<sz[lb])
    {
        swap(la,lb);
        swap(a,b);
    }
    lead[lb]=la;
    sz[la]+=sz[lb];
    if(get_br(a,0)%2==get_br(b,0)%2)sw[lb]++;
    cell h;
    h.a=la;
    h.b=lb;
    h.tim=br;
    s.push(h);
}
void rem(int num)
{
    for(int i=1;i<=num;i++)
    {
        if(s.top().tim==br)
        {
            int a=s.top().a;
            int b=s.top().b;
            s.pop();
            sz[a]-=sz[b];
            lead[b]=b;
        }
        br--;
        if(br<lamp)lamp=0;
    }
}
void rec(int l1,int l2,int r1,int r2)
{
    if(l1>l2)return;
    int mid=(l1+l2)/2;
    int nbr=br;
    for(int i=l1;i<mid;i++)
    {
        add(a[i],b[i]);
    }
    //cout<<br<<endl;
    int x=r2;
    int obr=br;
    while(!lamp&&x>max(mid,r1))
    {
        x--;
        add(a[x],b[x]);
    }
    int ubr=br;
    if(x<max(mid,r1))x=-1;
    otg[mid]=x;
    //cout<<l1<<" "<<l2<<" "<<r1<<" "<<r2<<" "<<otg[mid]<<endl;
    //cout<<nbr<<" "<<obr<<" "<<br<<" "<<mid<<endl;
    rem(ubr-obr);

    add(a[mid],b[mid]);

    rec(mid+1,l2,otg[mid],r2);

    rem(1);

    //cout<<l1<<" "<<l2<<" "<<br<<" "<<nbr<<" "<<obr<<" "<<ubr<<" "<<otg[mid]<<endl;

    rem(obr-nbr);

    for(int i=r2-(ubr-obr);i<r2;i++)
    {
        add(a[i],b[i]);
    }

    rec(l1,mid-1,r1,otg[mid]);

    rem(ubr-obr);
}
void read()
{
    cin>>n>>m>>q;
    prec();
    for(int i=1;i<=m;i++)
    {
        cin>>a[i]>>b[i];
    }
    rec(1,m,1,m+1);
    for(int i=1;i<=q;i++)
    {
        cin>>l>>r;
        if(otg[l]>r)cout<<"YES"<<endl;
        else cout<<"NO"<<endl;
    }
}
int main()
{
    speed();
    read();
    return 0;
}

Subtask #1
0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 4432 KB Output is correct
2 Correct 1 ms 4432 KB Output is correct
3 Correct 1 ms 4432 KB Output is correct
4 Incorrect 1 ms 4432 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #2
0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 4432 KB Output is correct
2 Correct 1 ms 4432 KB Output is correct
3 Correct 1 ms 4432 KB Output is correct
4 Incorrect 1 ms 4432 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #3
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 4432 KB Output is correct
2 Correct 1 ms 4432 KB Output is correct
3 Correct 106 ms 8912 KB Output is correct
4 Correct 166 ms 9512 KB Output is correct
5 Correct 84 ms 7496 KB Output is correct
6 Correct 109 ms 9088 KB Output is correct
7 Correct 108 ms 6808 KB Output is correct
8 Correct 119 ms 9392 KB Output is correct
9 Correct 131 ms 10016 KB Output is correct
10 Correct 181 ms 7772 KB Output is correct
11 Correct 127 ms 6744 KB Output is correct
12 Correct 140 ms 11096 KB Output is correct
13 Correct 125 ms 9288 KB Output is correct
14 Correct 124 ms 9656 KB Output is correct
15 Correct 163 ms 6788 KB Output is correct
16 Correct 190 ms 11216 KB Output is correct

Subtask #4
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 4432 KB Output is correct
2 Correct 1 ms 4432 KB Output is correct
3 Correct 1 ms 4432 KB Output is correct
4 Incorrect 1 ms 4432 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #5
0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 4432 KB Output is correct
2 Correct 1 ms 4432 KB Output is correct
3 Correct 1 ms 4432 KB Output is correct
4 Incorrect 1 ms 4432 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #6
0 / 29.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 4432 KB Output is correct
2 Correct 1 ms 4432 KB Output is correct
3 Correct 1 ms 4432 KB Output is correct
4 Incorrect 1 ms 4432 KB Output isn't correct
5 Halted 0 ms 0 KB -