Submission #865909

#	Time	Username	Problem	Language	Result	Execution time	Memory
865909		HuyQuang_re_Zero	Teleporters (IOI08_teleporters)	C++14	85 / 100	1086 ms	65536 KiB

teleporters

#include <bits/stdc++.h>
#define ll long long
#define db long double
#define N 1000005
#define II pair <int,int>
#define III pair <ll,II>
#define IV pair <vector <int>,vector <int> >
#define fst first
#define snd second
#define BIT(x,i) ((x>>i)&1)
#define Log(x) (31-__builtin_clz((int)x))
#define LogLL(x) (63-__builtin_clzll((ll)x))
#define pi acos(-1)
#define to_radian(x) (x*pi/180.0)
#define to_degree(x) (x*180.0/pi)
using namespace std;
int n,m,End[2*N],From[2*N],i,u,sz,l,r,res,nxt[2*N],node,last;
bool visited[N];
II a[2*N];
int rev(int u) { return (u<=n) ? u+n : u-n; }
int main()
{
   // freopen("teleporters.inp","r",stdin);
    //freopen("teleporters.out","w",stdout);
    ios_base::sync_with_stdio(0);
    cin.tie(0); cout.tie(0);
    cin>>n>>m;
    a[++sz]={ 0,0 }; a[++sz]={ 2000001,2*n+1 };
    for(i=1;i<=n;i++)
    {
        cin>>l>>r;
        a[++sz]={ l,i }; a[++sz]={ r,rev(i) };
    }
    sort(a+1,a+sz+1);
    for(i=2;i<=sz;i++) End[++node]=a[i].snd,From[a[i-1].snd]=node;
    for(u=1;u<=node;u++) nxt[u]=From[rev(End[u])];
    for(u=1;u<node;u=nxt[u]) visited[u]=1,res++;
    visited[node]=1;


    vector <int> val;
    for(u=2;u<=node;u++)
        if(visited[u]==0)
        {
            int v=nxt[u],edge=0;
            while(v!=u) visited[v]=1,edge++,v=nxt[v];
            visited[v]=1,edge++;
            val.push_back(edge);
        }

    sort(val.begin(),val.end());
    for(i=1;i<=m;i++)
        if(val.size()>0)
        {
            int k=val.back(); val.pop_back();
            res+=k+2;
        }
        else
        {
            res++;
            val.push_back(1);
        }
    cout<<res;
}

• Subtask 1: 5 / 5
• Subtask 2: 5 / 5
• Subtask 3: 5 / 5
• Subtask 4: 5 / 5
• Subtask 5: 5 / 5
• Subtask 6: 5 / 5
• Subtask 7: 5 / 5
• Subtask 8: 5 / 5
• Subtask 9: 5 / 5
• Subtask 10: 5 / 5
• Subtask 11: 5 / 5
• Subtask 12: 5 / 5
• Subtask 13: 5 / 5
• Subtask 14: 5 / 5
• Subtask 15: 5 / 5
• Subtask 16: 5 / 5
• Subtask 17: 5 / 5
• Subtask 18: 0 / 5
• Subtask 19: 0 / 5
• Subtask 20: 0 / 5