Submission #77909

#	Time	Username	Problem	Language	Result	Execution time	Memory
77909		Saboon	Global Warming (CEOI18_glo)	C++14	48 / 100	2063 ms	123284 KiB

glo

#include <iostream>
#include <queue>
#include <bitset>
#include <stack>
#include <vector>
#include <cstring>
#include <cmath>
#include <unordered_map>
#include <map>
#include <set>
#include <algorithm>
#include <iomanip>
#define F first
#define S second
#define PB push_back
#define PF push_front
#define MP make_pair

using namespace std;

typedef long long ll;
typedef long double ld;
typedef pair<int,int> pii;
typedef unsigned long long ull;

const int inf = 1e9 + 100;
const int maxn = 2e5 + 100;

unordered_map <int, int> seg[2];

int dp[maxn][2], a[maxn];

void change (int idx, int val, bool wh) {
    for (; idx <= inf; idx += idx & -idx)
        seg[wh][idx] = max (seg[wh][idx], val);
}

int get (int idx, bool wh) {
    if (idx == 0)
        return 0;
    idx = min (idx, inf - 1);
    int ret = 0;
    for (; idx > 0; idx -= idx & -idx)
        ret = max (ret, seg[wh][idx]);
    return ret;
}

int main() {
    ios_base::sync_with_stdio(false);
    int n, x;
    cin >> n >> x;
    for (int i = 0; i < n; i++)
        cin >> a[i];
    dp[0][0] = 1;
    dp[0][1] = 1;
    int ans = 1;
    change (a[0], dp[0][0], 0);
    change (a[0], dp[0][1], 1);
    for (int i = 1; i < n; i++) {
        dp[i][0] = get (a[i] - 1, 0) + 1;
        dp[i][1] = get (a[i] + x - 1, 0) + 1;
        dp[i][1] = max (dp[i][1], get (a[i] - 1, 1) + 1);
        change (a[i], dp[i][0], 0);
        change (a[i], dp[i][1], 1);
        ans = max (ans, dp[i][1]);
    }
    cout << ans << endl;
}

• Subtask 1: 5 / 5
• Subtask 2: 10 / 10
• Subtask 3: 13 / 13
• Subtask 4: 0 / 10
• Subtask 5: 20 / 20
• Subtask 6: 0 / 17
• Subtask 7: 0 / 25