Submission #971913

#	Time	Username	Problem	Language	Result	Execution time	Memory
971913		jadai007	Global Warming (CEOI18_glo)	C++17	38 / 100	2045 ms	3568 KiB

glo

#include<bits/stdc++.h>
#define int long long

using namespace std;

int n,x, arr[200200], p, dp[200200], ans;

signed main(){
    cin.tie(nullptr)->sync_with_stdio(false);
    cin >> n >> x;
    for(int i = 0; i<n; ++i) cin >> arr[i];
    if(x == 0){
        for(int i = 0; i<n; ++i){
            int idx = lower_bound(dp, dp+p, arr[i]) - dp;
            if(idx == p) ++p;
            dp[idx] = arr[i];
        }
        cout << p;
        return 0;
    }
    for(int i = 0; i<n; ++i){
        memset(dp, 0, sizeof(dp));
        p = 0;
        for(int j = 0; j<n; ++j){
            int a = arr[j];
            if(j <= i) a-=x;
            int idx = lower_bound(dp, dp+p, a) - dp;
            if(idx == p) p++;
            dp[idx] = a;
        }
        ans = max(ans, p);
    }
    cout << ans;
}

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