Submission #967468

#	Time	Username	Problem	Language	Result	Execution time	Memory
967468		batsukh2006	Global Warming (CEOI18_glo)	C++17	17 / 100	345 ms	24296 KiB

glo

#include<iostream>
#include<stdio.h>
#include<math.h>
#include<map>
#include<string>
#include<algorithm>
#include<vector>
#include<string.h>
#include<utility>
#include<set>
#include<cmath>
#include<queue>
#include<deque>
#include<functional>
#include<stack>
#include<limits.h>
#include<iomanip>
#include<unordered_map> 
#include<numeric>
#include<tuple>
#include<bitset>
using namespace std;
 
#define MOD 1000000007
#define int long long
#define ff first
#define ss second
#define endl '\n'
const int mxN=2e5+1;
vector<int> tree(4*mxN);
int cal(int node, int L, int R, int l, int r){
    if(L>r||R<l) return 0;
    if(L>=l&&R<=r) return tree[node];
    return max(cal(node*2,L,(L+R)/2,l,r),cal(node*2+1,(L+R)/2+1,R,l,r));
}
void up(int node, int L, int R, int p, int v){
    if(L>p||R<p) return;
    if(L==R){
        tree[node]=v;
        return;
    }
    up(node*2,L,(L+R)/2,p,v);
    up(node*2+1,(L+R)/2+1,R,p,v);
    tree[node]=max(tree[node*2],tree[node*2+1]);
}
void solve(){
	int n,d; cin>>n>>d;
	map<int,int> mp;
    vector<int> a(n+1);
    for(int i=1; i<=n; i++) cin>>a[i],mp[a[i]];
    int k=1;
    for(auto& x: mp) x.ss=k++;
    for(int i=1; i<=n; i++) a[i]=mp[a[i]];
    vector<int> dp(n+2);
    for(int i=n; i>=1; i--){
    	int mx=cal(1,1,n,a[i]+1,n);
    	up(1,1,n,a[i],mx+1);
    	dp[i]=max(dp[i+1],mx+1);
    }
    for(int i=1; i<=n; i++) up(1,1,n,a[i],0);
    int ans=0;
    for(int i=1; i<=n; i++){
    	int mx=cal(1,1,n,1,a[i]-1);
    	up(1,1,n,a[i],mx+1);
    	ans=max(ans,dp[i+1]+mx+1);
    }
    cout<<ans;
}
signed main(){
    // freopen("248.in", "r", stdin);
    // freopen("248.out", "w", stdout);
    ios::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    
    int t=1;
    // cin>>t;
    while(t--){
        solve();
        cout<<endl;
    }
    return 0;
}

• 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