Submission #957024

#	Time	Username	Problem	Language	Result	Execution time	Memory
957024		Charizard2021	Global Warming (CEOI18_glo)	C++17	15 / 100	70 ms	1748 KiB

glo

#include<bits/stdc++.h>
using namespace std;
int main(){
    int n, x;
    cin >> n >> x;
    int a[n];
    for(int i = 0;i < n; i++) cin >> a[i];
    if(x == 0){
        vector<int> dp;
        for(int i = 0; i < n; i++){
            int idx = lower_bound(dp.begin(), dp.end(), a[i]) - dp.begin();
            if(idx == (int)dp.size()){
                dp.push_back(a[i]);
            }
            else{
                dp[idx] = a[i];
            }
        }
        cout << dp.size() << "\n";
    }
    else{
        if(n <= 1000){
            int ans = 0;
            for(int i = -1; i < n; i++){
                int b[n];
                for(int j = 0; j < n; j++){
                    if(j <= i){
                        b[j] = a[j] - x;
                    }
                    else{
                        b[j] = a[j];
                    }
                }
                vector<int> dp;
                for(int j = 0; j < n; j++){
                    int idx = lower_bound(dp.begin(), dp.end(), b[j]) - dp.begin();
                    if(idx == (int)dp.size()){
                        dp.push_back(b[j]);
                    }
                    else{
                        dp[idx] = a[j];
                    }
                }
                ans = max(ans, (int)dp.size());
            }
            cout << ans << "\n";
        }
    }
}

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