Submission #82800

#	Time	Username	Problem	Language	Result	Execution time	Memory
82800		Bodo171	Fortune Telling 2 (JOI14_fortune_telling2)	C++14	100 / 100	1624 ms	119800 KiB

fortune_telling2

#include <iostream>
#include <vector>
#include <algorithm>
#include <fstream>
#include <map>
using namespace std;
const int nmax=200005;
vector<int> all,qry[nmax];
map<int,int> norm;
int aib[3*nmax],arb[12*nmax];
int a[nmax],b[nmax],val[nmax];
int n,k,st,dr,poz,value,ans,i,lim,ind;
void update(int nod,int l,int r)
{
    if(l==r)
    {
        arb[nod]=value;
        return;
    }
    int m=(l+r)/2;
    if(poz<=m) update(2*nod,l,m);
    else update(2*nod+1,m+1,r);
    arb[nod]=max(arb[2*nod],arb[2*nod+1]);
}
void query(int nod,int l,int r)
{
    if(st<=l&&r<=dr)
    {
        ans=max(ans,arb[nod]);
        return;
    }
    int m=(l+r)/2;
    if(st<=m) query(2*nod,l,m);
    if(m<dr) query(2*nod+1,m+1,r);
}
inline int lbit(int x)
{
    return ((x^(x-1))&x);
}
void upd(int poz)
{
    for(int idx=poz;idx<=lim;idx+=lbit(idx))
        aib[idx]^=1;
}
int qr(int poz)
{
    int ret=0;
    for(int idx=poz;idx>0;idx-=lbit(idx))
        ret^=aib[idx];
    return ret;
}
int main()
{
    //freopen("data.in","r",stdin);
    ios_base::sync_with_stdio(false);
    cin>>n>>k;
    for(i=1;i<=n;i++)
    {
        cin>>a[i]>>b[i];
        all.push_back(a[i]);
        all.push_back(b[i]);
    }
    for(i=1;i<=k;i++)
    {
        cin>>val[i];
        all.push_back(val[i]);
    }
    sort(all.begin(),all.end());
    unique(all.begin(),all.end());
    for(int i=0;i<all.size();i++)
        norm[all[i]]=i+1;
    lim=all.size();
    for(i=1;i<=k;i++)
    {
        poz=norm[val[i]];value=i;
        update(1,1,lim);
    }
    for(i=1;i<=n;i++)
    {
        ans=0;
        st=norm[min(a[i],b[i])];dr=norm[max(a[i],b[i])]-1;
        if(st>dr)
            continue;
        query(1,1,lim);
        if(ans!=0&&a[i]<b[i])
            swap(a[i],b[i]);
        qry[ans+1].push_back(i);
    }
    for(i=k+1;i>=1;i--)
    {
        if(i<=k) upd(norm[val[i]]);
        for(int j=0;j<qry[i].size();j++)
        {
            ind=qry[i][j];
            poz=norm[min(a[ind],b[ind])];
            if(qr(lim)^qr(poz-1))
                swap(a[ind],b[ind]);
        }
    }
    long long sum=0;
    for(i=1;i<=n;i++)
        sum+=1LL*a[i];
    cout<<sum;
    return 0;
}

Compilation message (stderr)

fortune_telling2.cpp: In function 'int main()':
fortune_telling2.cpp:70:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(int i=0;i<all.size();i++)
                 ~^~~~~~~~~~~
fortune_telling2.cpp:92:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         for(int j=0;j<qry[i].size();j++)
                     ~^~~~~~~~~~~~~~

• Subtask 1: 4 / 4
• Subtask 2: 31 / 31
• Subtask 3: 65 / 65