Submission #533797

#	Time	Username	Problem	Language	Result	Execution time	Memory
533797		alextodoran	Global Warming (CEOI18_glo)	C++17	28 / 100	2050 ms	6264 KiB

glo

/**
 ____ ____ ____ ____ ____
||a |||t |||o |||d |||o ||
||__|||__|||__|||__|||__||
|/__\|/__\|/__\|/__\|/__\|

**/

#include <bits/stdc++.h>

using namespace std;

typedef long long ll;

const int N_MAX = 200000;
const int T_MAX = (int) 2e9;

int n, x;
int t[N_MAX + 2];

int before[N_MAX + 2], after[N_MAX + 2];
map <int, int> beforeFen, afterFen;
void update (map <int, int> &Fen, int pos, int val) {
    for (ll i = pos; i <= T_MAX; i += i & -i) {
        Fen[i] = max(Fen[i], val);
    }
}
int query (map <int, int> Fen, int pos) {
    int ret = 0;
    for (int i = pos; i >= 1; i -= i & -i) {
        ret = max(ret, Fen[i]);
    }
    return ret;
}

int main () {
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    cout.tie(0);

    cin >> n >> x;
    for (int i = 1; i <= n; i++) {
        cin >> t[i];
    }

    for (int i = 1; i <= n; i++) {
        before[i] = query(beforeFen, t[i] - 1) + 1;
        after[i] = max(query(afterFen, t[i] - 1), query(beforeFen, t[i] + x - 1)) + 1;
        update(beforeFen, t[i], before[i]);
        update(afterFen, t[i], after[i]);
    }

    cout << query(afterFen, T_MAX) << "\n";

    return 0;
}

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