Submission #95149

#	Time	Username	Problem	Language	Result	Execution time	Memory
95149		MvC	Fortune Telling 2 (JOI14_fortune_telling2)	C++11	100 / 100	410 ms	84064 KiB

fortune_telling2

#pragma GCC optimize("O3")
#include<bits/stdc++.h>
#define rc(x) return cout<<x<<endl,0
#define pb push_back
#define in insert
#define er erase
#define fd find
#define fr first
#define sc second
typedef long long ll;
typedef long double ld;
const ll INF=0x3f3f3f3f3f3f3f3f;
const ll llinf=(1LL<<61);
const int inf=(1<<30);
const int nmax=1e6+50;
const int mod=1e9+7;
using namespace std;
int a[nmax],b[nmax],q[nmax],n,m,i,j,t,sp[20][nmax],fw[nmax],sz,ans[nmax],cur,l,r;
ll sum;
vector<int>v;
vector<pair<int,int> >vc[nmax];
void upd(int i)
{
	for(;i>=1;i-=i&(-i))fw[i]++;
}
int qry(int i)
{
	int rs=0;
	for(;i<=sz;i+=i&(-i))rs+=fw[i];
	return rs;
}
int main()
{
	//freopen("sol.in","r",stdin);
	//freopen("sol.out","w",stdout);
	ios_base::sync_with_stdio(false);cin.tie(0);cerr.tie(0);cout.tie(0);
	cin>>n>>m;
	for(i=1;i<=n;i++)
	{
		cin>>a[i]>>b[i];
		v.pb(a[i]);
		v.pb(b[i]);
	}
	for(i=1;i<=m;i++)
	{
		cin>>q[i];
		v.pb(q[i]);
	}
	sort(v.begin(),v.end());
	v.resize(unique(v.begin(),v.end())-v.begin());
	sz=v.size();
	for(i=1;i<=m;i++)
	{
		q[i]=lower_bound(v.begin(),v.end(),q[i])-v.begin()+1;
		sp[0][q[i]]=++t;
	}
	for(i=1;sz>>i;++i)for(j=1;j+(1<<i)<=sz+1;++j)sp[i][j]=max(sp[i-1][j],sp[i-1][j+(1<<(i-1))]);
	for(i=1;i<=n;i++)
	{
		l=min(a[i],b[i]);
		r=max(a[i],b[i]);
		l=lower_bound(v.begin(),v.end(),l)-v.begin()+1;
		r=lower_bound(v.begin(),v.end(),r)-v.begin()+1;
		cur=0;
		for(j=20;j>=0;--j)if(l+(1<<j)<=r)cur=max(cur,sp[j][l]),l+=(1<<j);
		if(cur!=0)
		{
			ans[i]=1;
			if(a[i]>b[i])swap(a[i],b[i]);
		}
		vc[cur].pb({i,r});
	}
	for(i=m;i>=0;i--)
	{
		for(j=0;j<vc[i].size();j++)ans[vc[i][j].fr]^=qry(vc[i][j].sc)&1;
		if(i)upd(q[i]);
	}
	for(i=1;i<=n;i++)
	{
		if(ans[i])sum+=b[i];
		else sum+=a[i];
	}
	cout<<sum<<endl;
    return 0;
}
/*
5 3
4 6
9 1
8 8
4 2
3 7
8
2
9
*/

Compilation message (stderr)

fortune_telling2.cpp: In function 'int main()':
fortune_telling2.cpp:75:12: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(j=0;j<vc[i].size();j++)ans[vc[i][j].fr]^=qry(vc[i][j].sc)&1;
           ~^~~~~~~~~~~~~

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