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Submission #72895

# Submission time Handle Problem Language Result Execution time Memory
72895 2018-08-27T07:46:26 Z duckmoon99 Global Warming (CEOI18_glo) C++14
42 / 100
 96 ms 5776 KB 
#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>

using namespace std;
using namespace __gnu_pbds;

#define fi first
#define se second
#define mp make_pair
#define pb push_back
#define fbo find_by_order
#define ook order_of_key
#define INF 1e18
#define ret return

typedef long long ll;
typedef pair<int,int> ii;
typedef vector<int> vi;
typedef vector < pair<int, int> > vii;
typedef long double ld;
typedef tree<pair<int,int>, null_type, less<pair<int,int> >, rb_tree_tag, tree_order_statistics_node_update> pbds;
typedef set<int>::iterator sit;
typedef map<int,int>::iterator mit;
typedef vector<int>::iterator vit;

ll a[222222];
ll b[222222];
int ans1[222222];
int ans2[222222];

int main(){
    ios_base::sync_with_stdio(0); cin.tie(0);
    int n;
    ll x;
    cin >> n >> x;
    for(int i = 0; i < n; i++){
		cin >> a[i];
	}
	if(n<=50 && x<=50){
		int tans=-1;
		for(int l = 0; l < n; l++){
			for(int r = l+1; r <= n; r++){
				for(int d = -x; d <= x; d++){
					for(int i = 0; i < n; i++){
						b[i]=a[i];
					}
					for(int i = l; i < r; i++){
						b[i]+=d;
					}
					vector<ll> dd(n+1,INF);
					for(int i = 0; i < n; i++){
						*lower_bound(dd.begin(),dd.end(),b[i])=b[i];
					}
					for(int i = 0; i <= n; i++){
						if(dd[i]==INF){
							tans=max(tans,i);
							i=n+1;
						}
					}
				}
			}
		}
		cout << tans;
		ret 0;
	}
	else if(x==0){
		vector<ll> dd(n+1,INF);
		for(int i = 0; i < n; i++){
			*lower_bound(dd.begin(),dd.end(),a[i])=a[i];
		}
		for(int i = 0; i <= n; i++){
			if(dd[i]==INF){
				cout << i;
				ret 0;
			}
		}
	}
	else{
		vector <ll> LIS;
		for(int i = 0; i < n; i++){
			if(LIS.empty()){
				LIS.pb(a[i]);
			}
			else{
				if(LIS[LIS.size()-1]<a[i]){
					LIS.pb(a[i]);
				}
				else{
					*lower_bound(LIS.begin(),LIS.end(),a[i])=a[i];
				}
			}
			ans1[i]=LIS.size();
		}
		vector <ll> LISS;
		for(int i = 0; i < n; i++){
			if(LISS.empty()){
				LISS.pb(-a[n-1-i]);
			}
			else{
				if(LISS[LISS.size()-1]<-a[n-1-i]){
					LISS.pb(-a[n-1-i]);
				}
				else{
					*lower_bound(LISS.begin(),LISS.end(),-a[n-1-i])=-a[n-1-i];
				}
			}
			ans2[n-i-1]=LISS.size();
		}
		int tans = max(ans2[0],ans1[n-1]);
		/*for(int i = 0; i < n; i++){
			cout << '*' << ans2[i] << endl;
		}*/
		for(int i = 0; i < n-1; i++){
			tans=max(tans,ans1[i]+ans2[i+1]);
		}
		cout << tans;
	}
}

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 376 KB Output is correct
2 Correct 3 ms 484 KB Output is correct
3 Correct 2 ms 532 KB Output is correct
4 Correct 3 ms 640 KB Output is correct
5 Correct 2 ms 640 KB Output is correct
6 Correct 2 ms 640 KB Output is correct
7 Correct 2 ms 640 KB Output is correct
8 Correct 2 ms 640 KB Output is correct
9 Correct 2 ms 640 KB Output is correct
10 Correct 2 ms 640 KB Output is correct
11 Correct 3 ms 640 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 376 KB Output is correct
2 Correct 3 ms 484 KB Output is correct
3 Correct 2 ms 532 KB Output is correct
4 Correct 3 ms 640 KB Output is correct
5 Correct 2 ms 640 KB Output is correct
6 Correct 2 ms 640 KB Output is correct
7 Correct 2 ms 640 KB Output is correct
8 Correct 2 ms 640 KB Output is correct
9 Correct 2 ms 640 KB Output is correct
10 Correct 2 ms 640 KB Output is correct
11 Correct 3 ms 640 KB Output is correct
12 Correct 29 ms 640 KB Output is correct
13 Correct 3 ms 640 KB Output is correct
14 Correct 96 ms 740 KB Output is correct
15 Correct 47 ms 740 KB Output is correct
16 Correct 40 ms 740 KB Output is correct
17 Correct 2 ms 740 KB Output is correct
18 Correct 2 ms 740 KB Output is correct

Subtask #3
0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 376 KB Output is correct
2 Correct 3 ms 484 KB Output is correct
3 Correct 2 ms 532 KB Output is correct
4 Correct 3 ms 640 KB Output is correct
5 Correct 2 ms 640 KB Output is correct
6 Correct 2 ms 640 KB Output is correct
7 Correct 2 ms 640 KB Output is correct
8 Correct 2 ms 640 KB Output is correct
9 Correct 2 ms 640 KB Output is correct
10 Correct 2 ms 640 KB Output is correct
11 Correct 3 ms 640 KB Output is correct
12 Correct 29 ms 640 KB Output is correct
13 Correct 3 ms 640 KB Output is correct
14 Correct 96 ms 740 KB Output is correct
15 Correct 47 ms 740 KB Output is correct
16 Correct 40 ms 740 KB Output is correct
17 Correct 2 ms 740 KB Output is correct
18 Correct 2 ms 740 KB Output is correct
19 Incorrect 3 ms 740 KB Output isn't correct
20 Halted 0 ms 0 KB -

Subtask #4
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 44 ms 3708 KB Output is correct
2 Correct 72 ms 3708 KB Output is correct
3 Correct 66 ms 3708 KB Output is correct
4 Correct 47 ms 3708 KB Output is correct
5 Correct 33 ms 3708 KB Output is correct

Subtask #5
0 / 20.0

# Verdict Execution time Memory Grader output
1 Incorrect 17 ms 3708 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #6
17.0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 30 ms 3708 KB Output is correct
2 Correct 30 ms 3708 KB Output is correct
3 Correct 59 ms 3760 KB Output is correct
4 Correct 36 ms 5744 KB Output is correct
5 Correct 18 ms 5744 KB Output is correct
6 Correct 28 ms 5776 KB Output is correct
7 Correct 43 ms 5776 KB Output is correct
8 Correct 27 ms 5776 KB Output is correct

Subtask #7
0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 376 KB Output is correct
2 Correct 3 ms 484 KB Output is correct
3 Correct 2 ms 532 KB Output is correct
4 Correct 3 ms 640 KB Output is correct
5 Correct 2 ms 640 KB Output is correct
6 Correct 2 ms 640 KB Output is correct
7 Correct 2 ms 640 KB Output is correct
8 Correct 2 ms 640 KB Output is correct
9 Correct 2 ms 640 KB Output is correct
10 Correct 2 ms 640 KB Output is correct
11 Correct 3 ms 640 KB Output is correct
12 Correct 29 ms 640 KB Output is correct
13 Correct 3 ms 640 KB Output is correct
14 Correct 96 ms 740 KB Output is correct
15 Correct 47 ms 740 KB Output is correct
16 Correct 40 ms 740 KB Output is correct
17 Correct 2 ms 740 KB Output is correct
18 Correct 2 ms 740 KB Output is correct
19 Incorrect 3 ms 740 KB Output isn't correct
20 Halted 0 ms 0 KB -