Submission #952816

#	Time	Username	Problem	Language	Result	Execution time	Memory
952816		irmuun	Global Warming (CEOI18_glo)	C++17	25 / 100	2064 ms	3036 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 ans=0;
    vector<ll>v;
    for(ll i=1;i<=n;i++){
        if(v.empty()||v.back()<t[i]){
            v.pb(t[i]);
        }
        else{
            ll x=lower_bound(all(v),t[i])-v.begin();
            v[x]=t[i];
        }
    }
    ans=v.size();
    for(ll d=-x;d<=x;d++){
        if(d==0) continue;
        for(ll l=1;l<=n;l++){
            for(ll r=1;r<=n;r++){
                for(ll j=l;j<=r;j++){
                    t[j]+=d;
                }
                v.clear();
                for(ll i=1;i<=n;i++){
                    if(v.empty()||v.back()<t[i]){
                        v.pb(t[i]);
                    }
                    else{
                        ll x=lower_bound(all(v),t[i])-v.begin();
                        v[x]=t[i];
                    }
                }
                ans=max(ans,(ll)v.size());
                for(ll j=l;j<=r;j++){
                    t[j]-=d;
                }
            }
        }
    }
    cout<<ans;
}

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