oj.uz

Submission #72934

# Submission time Handle Problem Language Result Execution time Memory
72934 2018-08-27T09:10:25 Z duckmoon99 Global Warming (CEOI18_glo) C++14
25 / 100
 2000 ms 3744 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{
	    int tanss=-1;
	    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]);
		}
		tanss=max(tans,tanss);
	    for(int t = 0; t < n; t++){
	        a[t]-=x;
		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]);
		}
		tanss=max(tans,tanss);
	    }
	    cout << tanss;
	}
}

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 376 KB Output is correct
2 Correct 2 ms 376 KB Output is correct
3 Correct 2 ms 564 KB Output is correct
4 Correct 2 ms 564 KB Output is correct
5 Correct 2 ms 564 KB Output is correct
6 Correct 3 ms 688 KB Output is correct
7 Correct 3 ms 712 KB Output is correct
8 Correct 2 ms 712 KB Output is correct
9 Correct 2 ms 712 KB Output is correct
10 Correct 2 ms 712 KB Output is correct
11 Correct 3 ms 712 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 2 ms 376 KB Output is correct
3 Correct 2 ms 564 KB Output is correct
4 Correct 2 ms 564 KB Output is correct
5 Correct 2 ms 564 KB Output is correct
6 Correct 3 ms 688 KB Output is correct
7 Correct 3 ms 712 KB Output is correct
8 Correct 2 ms 712 KB Output is correct
9 Correct 2 ms 712 KB Output is correct
10 Correct 2 ms 712 KB Output is correct
11 Correct 3 ms 712 KB Output is correct
12 Correct 34 ms 712 KB Output is correct
13 Correct 4 ms 712 KB Output is correct
14 Correct 105 ms 760 KB Output is correct
15 Correct 48 ms 760 KB Output is correct
16 Correct 38 ms 760 KB Output is correct
17 Correct 2 ms 760 KB Output is correct
18 Correct 3 ms 760 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 2 ms 376 KB Output is correct
3 Correct 2 ms 564 KB Output is correct
4 Correct 2 ms 564 KB Output is correct
5 Correct 2 ms 564 KB Output is correct
6 Correct 3 ms 688 KB Output is correct
7 Correct 3 ms 712 KB Output is correct
8 Correct 2 ms 712 KB Output is correct
9 Correct 2 ms 712 KB Output is correct
10 Correct 2 ms 712 KB Output is correct
11 Correct 3 ms 712 KB Output is correct
12 Correct 34 ms 712 KB Output is correct
13 Correct 4 ms 712 KB Output is correct
14 Correct 105 ms 760 KB Output is correct
15 Correct 48 ms 760 KB Output is correct
16 Correct 38 ms 760 KB Output is correct
17 Correct 2 ms 760 KB Output is correct
18 Correct 3 ms 760 KB Output is correct
19 Incorrect 67 ms 760 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 51 ms 3712 KB Output is correct
2 Correct 44 ms 3744 KB Output is correct
3 Correct 52 ms 3744 KB Output is correct
4 Correct 46 ms 3744 KB Output is correct
5 Correct 40 ms 3744 KB Output is correct

Subtask #5
0 / 20.0

# Verdict Execution time Memory Grader output
1 Execution timed out 2061 ms 3744 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #6
0 / 17.0

# Verdict Execution time Memory Grader output
1 Execution timed out 2068 ms 3744 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #7
0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 376 KB Output is correct
2 Correct 2 ms 376 KB Output is correct
3 Correct 2 ms 564 KB Output is correct
4 Correct 2 ms 564 KB Output is correct
5 Correct 2 ms 564 KB Output is correct
6 Correct 3 ms 688 KB Output is correct
7 Correct 3 ms 712 KB Output is correct
8 Correct 2 ms 712 KB Output is correct
9 Correct 2 ms 712 KB Output is correct
10 Correct 2 ms 712 KB Output is correct
11 Correct 3 ms 712 KB Output is correct
12 Correct 34 ms 712 KB Output is correct
13 Correct 4 ms 712 KB Output is correct
14 Correct 105 ms 760 KB Output is correct
15 Correct 48 ms 760 KB Output is correct
16 Correct 38 ms 760 KB Output is correct
17 Correct 2 ms 760 KB Output is correct
18 Correct 3 ms 760 KB Output is correct
19 Incorrect 67 ms 760 KB Output isn't correct
20 Halted 0 ms 0 KB -