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Submission #960651

# Submission time Handle Problem Language Result Execution time Memory
960651 2024-04-10T18:41:33 Z HossamHero7 Global Warming (CEOI18_glo) C++14
28 / 100
 2000 ms 26280 KB 
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
#define endl '\n'
const int N = 2e5 + 5;
int dp[N][2];
struct SegTree{
    vector<int> tree;
    int n;
    SegTree(int _n){
        n = _n;
        tree.resize(4*n+5);
    }
    void update(int node,int l,int r,int idx,int val){
        if(l == r) return tree[node] = max(tree[node] , val) , void();
        int md = l + r >> 1;
        idx <= md ? update(node<<1,l,md,idx,val) : update(node<<1|1,md+1,r,idx,val);
        tree[node] = max(tree[node<<1],tree[node<<1|1]);
    }
    int query(int node,int l,int r,int lQ,int rQ){
        if(l > r || l > rQ || lQ > r) return 0;
        if(lQ <= l && r <= rQ) return tree[node];
        int md = l + r >> 1;
        return max(query(node<<1,l,md,lQ,rQ) , query(node<<1|1,md+1,r,lQ,rQ));
    }
    void update(int idx,int val){
        update(1,1,n,idx,val);
    }
    int query(int l,int r){
        if(l > r) return 0;
        return query(1,1,n,l,r);
    }
};
void compress(vector<int> &a){
    int n = a.size();
    vector<pair<int,int>> b(n);
    for(int i=0;i<n;i++){
        b[i].first = a[i];
        b[i].second = i;
    }
    sort(b.begin(),b.end());
    a[b[0].second] = 1;
    int cnt = 1;
    for(int i=1;i<n;i++){
        if(b[i].first == b[i-1].first){
            a[b[i].second] = a[b[i-1].second];
        }
        else a[b[i].second] = ++cnt;
    }
}
void solve(){
    ll n,x;
    cin>>n>>x;
    vector<ll> v(n);
    for(int i=0;i<n;i++) cin>>v[i];
    vector<int> tmp;
    for(auto i : v) {
        tmp.push_back(i);
        tmp.push_back(i-x+1);
        tmp.push_back(i+1);
    }
    compress(tmp);
    vector<ll> change(n);
    for(int i=0;i<n;i++){
        v[i] = tmp[i*3];
        change[i] = tmp[i*3+1];
    }
    SegTree sg0(3*n+5);
    SegTree sg1(3*n+5);
    for(int i=n-1;i>=0;i--){
        for(int j=0;j<2;j++){
            for(int k=i+1;k<n;k++){
                /*if(v[k] > v[i]){
                    dp[i][j] = max(dp[i][j] , dp[k][j] + 1);
                }*/
                dp[i][j] = j==0?sg0.query(v[i]+1,3*n):sg1.query(v[i]+1,3*n);
            }
            if(!j){
                /*for(int k=i+1;k<n;k++){
                    if(v[k] > v[i]-x){
                        dp[i][j] = max(dp[i][j] , dp[k][1] + 1);
                    }
                }*/
                dp[i][j] = max(dp[i][j] , sg1.query(change[i],3*n));
            }
            j==0?sg0.update(v[i],dp[i][j]+1):sg1.update(v[i],dp[i][j]+1);
        }
    }
    int ans = 0;
    for(int i=0;i<n;i++){
        ans = max(ans, dp[i][0] + 1);
    }
    cout<<ans<<endl;
}
int main(){
    ios_base::sync_with_stdio(0);
    cin.tie(0);      cout.tie(0);
    int t=1;
    //cin>>t;
    while(t--){
        solve();
    }
    return 0;
}

Compilation message

glo.cpp: In member function 'void SegTree::update(int, int, int, int, int)':
glo.cpp:16:20: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   16 |         int md = l + r >> 1;
      |                  ~~^~~
glo.cpp: In member function 'int SegTree::query(int, int, int, int, int)':
glo.cpp:23:20: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   23 |         int md = l + r >> 1;
      |                  ~~^~~

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 1 ms 344 KB Output is correct
3 Correct 1 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 1 ms 344 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 1 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 1 ms 348 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 1 ms 344 KB Output is correct
3 Correct 1 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 1 ms 344 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 1 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 1 ms 348 KB Output is correct
12 Correct 1 ms 348 KB Output is correct
13 Correct 1 ms 348 KB Output is correct
14 Correct 1 ms 348 KB Output is correct
15 Correct 1 ms 348 KB Output is correct
16 Correct 1 ms 348 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 0 ms 348 KB Output is correct

Subtask #3
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 1 ms 344 KB Output is correct
3 Correct 1 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 1 ms 344 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 1 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 1 ms 348 KB Output is correct
12 Correct 1 ms 348 KB Output is correct
13 Correct 1 ms 348 KB Output is correct
14 Correct 1 ms 348 KB Output is correct
15 Correct 1 ms 348 KB Output is correct
16 Correct 1 ms 348 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 73 ms 756 KB Output is correct
20 Correct 79 ms 592 KB Output is correct
21 Correct 76 ms 600 KB Output is correct
22 Correct 85 ms 600 KB Output is correct
23 Correct 78 ms 600 KB Output is correct
24 Correct 84 ms 600 KB Output is correct
25 Correct 62 ms 600 KB Output is correct
26 Correct 101 ms 604 KB Output is correct

Subtask #4
0 / 10.0

# Verdict Execution time Memory Grader output
1 Execution timed out 2025 ms 26280 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #5
0 / 20.0

# Verdict Execution time Memory Grader output
1 Execution timed out 2033 ms 7484 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 2071 ms 13384 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #7
0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 1 ms 344 KB Output is correct
3 Correct 1 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 1 ms 344 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 1 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 1 ms 348 KB Output is correct
12 Correct 1 ms 348 KB Output is correct
13 Correct 1 ms 348 KB Output is correct
14 Correct 1 ms 348 KB Output is correct
15 Correct 1 ms 348 KB Output is correct
16 Correct 1 ms 348 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 73 ms 756 KB Output is correct
20 Correct 79 ms 592 KB Output is correct
21 Correct 76 ms 600 KB Output is correct
22 Correct 85 ms 600 KB Output is correct
23 Correct 78 ms 600 KB Output is correct
24 Correct 84 ms 600 KB Output is correct
25 Correct 62 ms 600 KB Output is correct
26 Correct 101 ms 604 KB Output is correct
27 Execution timed out 2025 ms 26280 KB Time limit exceeded
28 Halted 0 ms 0 KB -