Submission #952888

#	Time	Username	Problem	Language	Result	Execution time	Memory
952888		irmuun	Global Warming (CEOI18_glo)	C++17	17 / 100	42 ms	7636 KiB

glo

#include<bits/stdc++.h>

using namespace std;

#define ll long long
#define pb push_back
#define ff first
#define ss second
#define all(s) s.begin(),s.end()
#define rall(s) s.rbegin(),s.rend()

int main(){
    ios_base::sync_with_stdio(false); cin.tie(0); cout.tie(0);
    ll n,x;
    cin>>n>>x;
    ll t[n+5];
    for(ll i=1;i<=n;i++){
        cin>>t[i];
    }
    ll pre[n+5];
    vector<ll>v;
    for(ll i=1;i<=n;i++){
        if(v.empty()||v.back()<t[i]){
            v.pb(t[i]);
            pre[i]=v.size();
        }
        else{
            ll x=lower_bound(all(v),t[i])-v.begin();
            v[x]=t[i];
            pre[i]=x+1;
        }
    }
    v.clear();
    ll suf[n+5];
    suf[n+1]=0;
    for(ll i=n;i>=1;i--){
        if(v.empty()||v.back()<-t[i]){
            v.pb(-t[i]);
            suf[i]=v.size();
        }
        else{
            ll x=lower_bound(all(v),-t[i])-v.begin();
            v[x]=-t[i];
            suf[i]=x+1;
        }
        if(i<n){
            suf[i]=max(suf[i],suf[i+1]);
        }
    }
    ll ans=suf[1];
    for(ll i=1;i<=n;i++){
        ans=max(ans,pre[i]+suf[i+1]);
    }
    cout<<ans;
}

• Subtask 1: 0 / 5
• Subtask 2: 0 / 10
• Subtask 3: 0 / 13
• Subtask 4: 0 / 10
• Subtask 5: 0 / 20
• Subtask 6: 17 / 17
• Subtask 7: 0 / 25