Submission #1193342

#	Time	Username	Problem	Language	Result	Execution time	Memory
1193342		vibhas	Growing Vegetables is Fun 4 (JOI21_ho_t1)	Java	100 / 100	175 ms	35040 KiB

Main

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.util.Scanner;
import java.util.StringTokenizer;

public class Main {
    public static void main(String[] args) throws Exception {

        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        int n = Integer.parseInt(br.readLine());
        long[] a = new long[n+2];
        long[] change_bef = new long[n+2];
        long[] change_aft = new long[n+2];
        StringTokenizer st = new StringTokenizer(br.readLine());
        for (int i = 1; i <= n; i++) {
            a[i] = Integer.parseInt(st.nextToken());
            change_bef[i] = change_bef[i - 1] + Math.max(a[i - 1] - a[i] + 1, 0);
        }

        // Build suffix array
        for (int i = n; i > 0; i--) {
            change_aft[i] = change_aft[i + 1] + Math.max(a[i + 1] - a[i] + 1, 0);
        }

        long ans = Long.MAX_VALUE;

        // Compute the final answer
        for (int i = 1; i <= n; i++) {
            ans = Math.min(ans, Math.max(change_bef[i], change_aft[i]));
        }
        System.out.println(ans);
        br.close();
    }
}

• Subtask 1: 40 / 40
• Subtask 2: 60 / 60