Submission #1218761

#	Time	Username	Problem	Language	Result	Execution time	Memory
1218761		muhammadali_2009	Global Warming (CEOI18_glo)	C++20	100 / 100	41 ms	6472 KiB

glo

#include <bits/stdc++.h>
#define fast ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0)
#define endl '\n'
#define ll long long
#define int long long
#define all(x) x.begin(), x.end()
#define seea(x) for(int i = 0; i < x; i++)
#define vc vector

using namespace std;
const int INF = LLONG_MAX;

void solve(){
    int n, x; 
    cin >> n >> x;
    vc<int> a(n), dp(n, INF), L(n), R(n);
    seea(n) cin >> a[i];

    for(int i = 0; i < n; i++){
        int j = lower_bound(all(dp), a[i]) - dp.begin();
        dp[j] = a[i];
        L[i] = j + 1;
    }

    fill(all(dp), INF);
    for(int i = n - 1; i >= 0; i--){
        int j = lower_bound(all(dp), -a[i] + x) - dp.begin();
        R[i] = j + 1;
        int k = lower_bound(all(dp), -a[i]) - dp.begin();
        dp[k] = -a[i];
    }

    int ans = 0;
    for(int i = 0; i < n; i++){
        ans = max(ans, L[i] + R[i] - 1);
    }
    cout << ans << endl;
}

signed main(){
    fast;
    solve();
}

• Subtask 1: 5 / 5
• Subtask 2: 10 / 10
• Subtask 3: 13 / 13
• Subtask 4: 10 / 10
• Subtask 5: 20 / 20
• Subtask 6: 17 / 17
• Subtask 7: 25 / 25