Submission #170675

#	Time	Username	Problem	Language	Result	Execution time	Memory
170675		mdn2002	Exhibition (JOI19_ho_t2)	C++14	0 / 100	2 ms	376 KiB

joi2019_ho_t2

#include<bits/stdc++.h>
using namespace std;
const long long mod=998244353;
int n,m,b[100005],mx,tree[4*100005],dp[100005];
pair<int,int>a[100005];
vector<int>v,v1;
multiset<int>ms;
map<int,int>mp;
void up(int nod,int l,int r,int x,int val)
{
    if(x<l||r<x)return;
    if(l==r)
    {
        tree[nod]=val;
        return;
    }
    int mid=(l+r)/2;
    up(nod*2,l,mid,x,val);
    up(nod*2+1,mid+1,r,x,val);
    tree[nod]=max(tree[nod*2],tree[nod*2+1]);
}
int qu(int nod,int l,int r,int x,int y)
{
    if(x<=l&&r<=y)return tree[nod];
    if(y<l||r<x)return 0;
    int mid=(l+r)/2;
    return max(qu(nod*2,l,mid,x,y),qu(nod*2+1,mid+1,r,x,y));
}
int main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    cout.tie(NULL);
    //freopen(".in","r",stdin);
    //freopen(".out","w",stdout);
    cin>>n>>m;
    for(int i=0;i<n;i++)cin>>a[i].first>>a[i].second;
    sort(a,a+n);
    for(int i=0;i<m;i++)cin>>b[i];
    sort(b,b+m);
    int x=0;
    for(int i=0;i<m;i++)
    {
        while(a[x].first<=b[i]&&x<n)
        {
            ms.insert(a[x].second);
            x++;
        }
        if(ms.size()==0)continue;
        v.push_back(*ms.begin());
        v1.push_back(*ms.begin());
        ms.erase(ms.begin());
    }
    int k=0;
    sort(v1.begin(),v1.end());
    for(int i=0;i<v1.size();i++)
    {
        if(mp[v1[i]]==0)mp[v1[i]]=++k;
    }
    for(int i=0;i<v.size();i++)
    {
        v[i]=mp[v[i]];
        dp[v[i]]=1+qu(1,0,m+3,0,v[i]);
        up(1,0,m+3,v[i],dp[v[i]]);
        mx=max(mx,dp[v[i]]);
    }
    cout<<mx;
}

Compilation message (stderr)

joi2019_ho_t2.cpp: In function 'int main()':
joi2019_ho_t2.cpp:56:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(int i=0;i<v1.size();i++)
                 ~^~~~~~~~~~
joi2019_ho_t2.cpp:60:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(int i=0;i<v.size();i++)
                 ~^~~~~~~~~

• Subtask 1: 0 / 10
• Subtask 2: 0 / 40
• Subtask 3: 0 / 50