Submission #532258

#	Time	Username	Problem	Language	Result	Execution time	Memory
532258		HaYoungJoon	Global Warming (CEOI18_glo)	C++14	0 / 100	52 ms	4144 KiB

glo

#include <bits/stdc++.h>

using namespace std;

int n, X, a[200001], b[200001], res1[200001], res2[200001], L[200001];

int main()
{
    ios_base::sync_with_stdio(0); cin.tie(0);
    cin >> n >> X;
    for (int i = 1; i <= n; i++) {
        cin >> a[i];
        b[i] = a[i];
    }
    reverse(b+1,b+1+n);
    int lis = 0;
    for (int i = 1; i <= n; i++) {
        int pos = upper_bound(L,L + lis, b[i]) - L;
        L[pos] = b[i];
        res1[i] = pos + 1;
        lis = max(lis, pos + 1);
    }
    for (int i = 1; i <= n; i++) a[i] -= X;
    memset(L,0,sizeof L);
    lis = 0;
    for (int i = 1; i <= n; i++) {
        int pos = upper_bound(L,L + lis, a[i]) - L;
        L[pos] = a[i];
        res2[i] = pos + 1;
        lis = max(lis, pos + 1);
    }
    int res = 0;
    for (int i = 1; i <= n; i++)
        res = max(res,res1[i] + res2[i] - 1);
    cout << res;
    return 0;
}

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