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Submission #1108391

# Submission time Handle Problem Language Result Execution time Memory
1108391 2024-11-04T03:51:11 Z koukirocks Global Warming (CEOI18_glo) C++17
100 / 100
 41 ms 5072 KB 
#include <bits/stdc++.h>
#define speed ios_base::sync_with_stdio(0); cin.tie(0)
#define all(x) (x).begin(),(x).end()
#define F first
#define S second
//#pragma GCC optimize("O3,unroll-loops")
//#pragma GCC target("avx,avx2")
//#pragma GCC target("popcnt")
 
using namespace std;
typedef long long ll;
typedef unsigned long long ull;
typedef double db;
typedef long double ldb;
typedef pair<int,int> pii;
typedef pair<ll,ll> pll;
 
const ll MAX=2e5+10,P=1e9+7;
const ll INF=0x3f3f3f3f,oo=0x3f3f3f3f3f3f3f3f;
const ldb eps=1e-6;
const ldb PI=acos(-1.0);
const int dir[4][2]={{0,1},{0,-1},{1,0},{-1,0}};
template<typename T>
using vvector = vector<vector<T>>;

int main() {
    speed;
    int n,x;
    cin>>n>>x;
    vector<int> a(n+1);
    vector<int> dp(n+1);
    for (int i=1;i<=n;i++) {
        cin>>a[i];
    }
    vector<int> curr;
    for (int i=1;i<=n;i++) {
        if (curr.empty() or curr.back()<a[i]) {
            curr.push_back(a[i]);
            dp[i]=curr.size();
        } else {
            auto it = lower_bound(all(curr),a[i]);
            *it = a[i];
            dp[i]=it-curr.begin()+1;
        }
        // cout<<dp[i]<<" ";
    }
    // cout<<"dp\n";
    curr.clear();
    vector<int> dp2(n+1);
    for (int i=n;i>=1;i--) {
        if (curr.empty() or curr.back()>a[i]-x) dp2[i]=curr.size()+1;
        else {
            int l=0,r=curr.size()-1;    
            while (l<r) {
                int mid=l+r>>1;
                if (curr[mid]<=a[i]-x) r=mid;
                else l=mid+1;
            }
            dp2[i]=l+1;
        }
        if (curr.empty() or curr.back()>a[i]) curr.push_back(a[i]);
        else {
            int l=0,r=curr.size()-1;    
            while (l<r) {
                int mid=l+r>>1;
                if (curr[mid]<=a[i]) r=mid;
                else l=mid+1;
            }
            curr[l]=a[i];
        }
        // cout<<dp2[i]<<" ";
    }
    // cout<<"dp2\n";
    int ans=0;
    for (int i=1;i<=n;i++) {
        // cout<<dp[i]<<" "<<dp2[i]<<" dp dp2\n";
        ans=max(ans,dp[i]+dp2[i]-1);
    }
    cout<<ans<<"\n";
    return 0;
}

/*
10 10
2 34 545 56 3 3 65 2 7 6
*/

Compilation message

glo.cpp: In function 'int main()':
glo.cpp:55:26: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   55 |                 int mid=l+r>>1;
      |                         ~^~
glo.cpp:65:26: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   65 |                 int mid=l+r>>1;
      |                         ~^~

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 336 KB Output is correct
2 Correct 1 ms 336 KB Output is correct
3 Correct 1 ms 336 KB Output is correct
4 Correct 1 ms 336 KB Output is correct
5 Correct 1 ms 456 KB Output is correct
6 Correct 1 ms 336 KB Output is correct
7 Correct 1 ms 336 KB Output is correct
8 Correct 1 ms 336 KB Output is correct
9 Correct 1 ms 336 KB Output is correct
10 Correct 1 ms 336 KB Output is correct
11 Correct 1 ms 508 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 336 KB Output is correct
2 Correct 1 ms 336 KB Output is correct
3 Correct 1 ms 336 KB Output is correct
4 Correct 1 ms 336 KB Output is correct
5 Correct 1 ms 456 KB Output is correct
6 Correct 1 ms 336 KB Output is correct
7 Correct 1 ms 336 KB Output is correct
8 Correct 1 ms 336 KB Output is correct
9 Correct 1 ms 336 KB Output is correct
10 Correct 1 ms 336 KB Output is correct
11 Correct 1 ms 508 KB Output is correct
12 Correct 1 ms 336 KB Output is correct
13 Correct 1 ms 504 KB Output is correct
14 Correct 1 ms 336 KB Output is correct
15 Correct 1 ms 508 KB Output is correct
16 Correct 1 ms 336 KB Output is correct
17 Correct 1 ms 336 KB Output is correct
18 Correct 1 ms 336 KB Output is correct

Subtask #3
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 336 KB Output is correct
2 Correct 1 ms 336 KB Output is correct
3 Correct 1 ms 336 KB Output is correct
4 Correct 1 ms 336 KB Output is correct
5 Correct 1 ms 456 KB Output is correct
6 Correct 1 ms 336 KB Output is correct
7 Correct 1 ms 336 KB Output is correct
8 Correct 1 ms 336 KB Output is correct
9 Correct 1 ms 336 KB Output is correct
10 Correct 1 ms 336 KB Output is correct
11 Correct 1 ms 508 KB Output is correct
12 Correct 1 ms 336 KB Output is correct
13 Correct 1 ms 504 KB Output is correct
14 Correct 1 ms 336 KB Output is correct
15 Correct 1 ms 508 KB Output is correct
16 Correct 1 ms 336 KB Output is correct
17 Correct 1 ms 336 KB Output is correct
18 Correct 1 ms 336 KB Output is correct
19 Correct 1 ms 336 KB Output is correct
20 Correct 1 ms 336 KB Output is correct
21 Correct 1 ms 336 KB Output is correct
22 Correct 1 ms 336 KB Output is correct
23 Correct 1 ms 336 KB Output is correct
24 Correct 1 ms 336 KB Output is correct
25 Correct 1 ms 336 KB Output is correct
26 Correct 1 ms 336 KB Output is correct

Subtask #4
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 36 ms 2808 KB Output is correct
2 Correct 37 ms 4720 KB Output is correct
3 Correct 37 ms 4688 KB Output is correct
4 Correct 38 ms 4680 KB Output is correct
5 Correct 18 ms 4304 KB Output is correct

Subtask #5
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 9 ms 848 KB Output is correct
2 Correct 9 ms 1536 KB Output is correct
3 Correct 10 ms 1360 KB Output is correct
4 Correct 5 ms 1360 KB Output is correct
5 Correct 1 ms 336 KB Output is correct
6 Correct 5 ms 1392 KB Output is correct
7 Correct 8 ms 1364 KB Output is correct

Subtask #6
17.0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 16 ms 1616 KB Output is correct
2 Correct 16 ms 1508 KB Output is correct
3 Correct 33 ms 2640 KB Output is correct
4 Correct 16 ms 3280 KB Output is correct
5 Correct 8 ms 1884 KB Output is correct
6 Correct 13 ms 3024 KB Output is correct
7 Correct 17 ms 3096 KB Output is correct
8 Correct 13 ms 1500 KB Output is correct

Subtask #7
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 336 KB Output is correct
2 Correct 1 ms 336 KB Output is correct
3 Correct 1 ms 336 KB Output is correct
4 Correct 1 ms 336 KB Output is correct
5 Correct 1 ms 456 KB Output is correct
6 Correct 1 ms 336 KB Output is correct
7 Correct 1 ms 336 KB Output is correct
8 Correct 1 ms 336 KB Output is correct
9 Correct 1 ms 336 KB Output is correct
10 Correct 1 ms 336 KB Output is correct
11 Correct 1 ms 508 KB Output is correct
12 Correct 1 ms 336 KB Output is correct
13 Correct 1 ms 504 KB Output is correct
14 Correct 1 ms 336 KB Output is correct
15 Correct 1 ms 508 KB Output is correct
16 Correct 1 ms 336 KB Output is correct
17 Correct 1 ms 336 KB Output is correct
18 Correct 1 ms 336 KB Output is correct
19 Correct 1 ms 336 KB Output is correct
20 Correct 1 ms 336 KB Output is correct
21 Correct 1 ms 336 KB Output is correct
22 Correct 1 ms 336 KB Output is correct
23 Correct 1 ms 336 KB Output is correct
24 Correct 1 ms 336 KB Output is correct
25 Correct 1 ms 336 KB Output is correct
26 Correct 1 ms 336 KB Output is correct
27 Correct 36 ms 2808 KB Output is correct
28 Correct 37 ms 4720 KB Output is correct
29 Correct 37 ms 4688 KB Output is correct
30 Correct 38 ms 4680 KB Output is correct
31 Correct 18 ms 4304 KB Output is correct
32 Correct 9 ms 848 KB Output is correct
33 Correct 9 ms 1536 KB Output is correct
34 Correct 10 ms 1360 KB Output is correct
35 Correct 5 ms 1360 KB Output is correct
36 Correct 1 ms 336 KB Output is correct
37 Correct 5 ms 1392 KB Output is correct
38 Correct 8 ms 1364 KB Output is correct
39 Correct 16 ms 1616 KB Output is correct
40 Correct 16 ms 1508 KB Output is correct
41 Correct 33 ms 2640 KB Output is correct
42 Correct 16 ms 3280 KB Output is correct
43 Correct 8 ms 1884 KB Output is correct
44 Correct 13 ms 3024 KB Output is correct
45 Correct 17 ms 3096 KB Output is correct
46 Correct 13 ms 1500 KB Output is correct
47 Correct 19 ms 2528 KB Output is correct
48 Correct 19 ms 2612 KB Output is correct
49 Correct 41 ms 4752 KB Output is correct
50 Correct 18 ms 4492 KB Output is correct
51 Correct 17 ms 3536 KB Output is correct
52 Correct 16 ms 4560 KB Output is correct
53 Correct 16 ms 4504 KB Output is correct
54 Correct 18 ms 5072 KB Output is correct
55 Correct 31 ms 4688 KB Output is correct