QOJ.ac

QOJ

IDProblemSubmitterResultTimeMemoryLanguageFile sizeSubmit timeJudge time
#571653#9313. Make MaxrainbowsWA 758ms127420kbJava113.0kb2024-09-18 02:22:372024-09-18 02:22:38

Judging History

你现在查看的是最新测评结果

  • [2024-09-18 15:56:24]
  • hack成功,自动添加数据
  • (/hack/836)
  • [2024-09-18 02:22:38]
  • 评测
  • 测评结果:WA
  • 用时:758ms
  • 内存:127420kb
  • [2024-09-18 02:22:37]
  • 提交

answer


import java.io.*;
import java.util.*;

public class Main {
    static Read scanner = new Read();
    static PrintWriter out = new PrintWriter(new BufferedWriter(new OutputStreamWriter(System.out)));

    public static void main(String[] args) throws IOException {
        int t = scanner.nextInt();
        while (t > 0) {
            int n = scanner.nextInt();
            int[] arr = new int[n + 1];
            arr[n] = -1;
            HashMap<Integer, Integer> first = new HashMap<>();
            HashMap<Integer, Integer> last = new HashMap<>();//记录元素最后一次出现的位置

            for (int i = 0; i < n; i++) {
                arr[i] = scanner.nextInt();
                last.put(arr[i], i);
            }
            for (int i = n - 1; i >= 0; i--) {
                first.put(arr[i], i);
            }
            Stack<Integer> stack = new Stack<>();
            int[] left = new int[n];
            int[] right = new int[n];
            //左边第一个比他大,需要下标

            for (int i = n - 1; i >= 0; i--) {
                while (!stack.isEmpty() && arr[i] > arr[stack.peek()]) {
                    left[stack.pop()] = i;
                }
                stack.push(i);
            }
            while (!stack.isEmpty()) {
                left[stack.pop()] = -1;
            }

            for (int i = 0; i < n; i++) {
                if (stack.isEmpty()) {
                    stack.push(i);
                } else {
                    while (!stack.isEmpty() && arr[i] > arr[stack.peek()]) {
                        right[stack.pop()] = i;
                    }
                    stack.push(i);
                }
            }
            while (!stack.isEmpty()) {
                right[stack.pop()] = n;
            }
            long ans = 0;

            //连续重复的特殊处理
            int pre = 0;
            for (int fast = 0; fast <= n; ) {
                if (arr[fast] == arr[pre]) {
                    fast++;
                    continue;
                } else {
                    //终于不相等了
                    //最左边是pre,最右边是fast - 1;
                    ans += pre - left[pre] - 1 + right[fast - 1] - (fast - 1) - 1;
                    pre = fast;
                }
            }

            out.println(ans);
            t--;
        }
        out.close();
    }
}

class Read {
    StringTokenizer st = new StringTokenizer("");
    BufferedReader bf = new BufferedReader(new InputStreamReader(System.in));

    String next() throws IOException {
        if (!st.hasMoreTokens()) {
            st = new StringTokenizer(bf.readLine());
        }
        return st.nextToken();
    }

    int nextInt() throws IOException {
        return Integer.parseInt(next());
    }

    long nextLong() throws IOException {
        return Long.parseLong(next());
    }

    String nextLine() throws IOException {
        return bf.readLine();
    }
}

Details

Tip: Click on the bar to expand more detailed information

Test #1:

score: 100
Accepted
time: 55ms
memory: 49812kb

input:

4
2
1 2
2
2 2
7
1 1 1 2 2 2 2
3
1 2 3

output:

1
0
3
3

result:

ok 4 number(s): "1 0 3 3"

Test #2:

score: 0
Accepted
time: 758ms
memory: 127420kb

input:

2
198018
875421126 585870339 471894633 383529988 625397685 944061047 704695631 105113224 459022561 760848605 980735314 847376362 980571959 329939331 644635272 326439858 752879510 837384394 175179068 182094523 397239381 1199016 185143405 279638454 252374970 822030887 860312140 137248166 993229443 164...

output:

4084978
4130372

result:

ok 2 number(s): "4084978 4130372"

Test #3:

score: -100
Wrong Answer
time: 637ms
memory: 95156kb

input:

2
195768
3086 1582 7854 5577 5243 2734 8054 4805 5686 7065 5555 2410 6240 7589 2889 3745 8094 9147 9438 1252 5497 5786 6655 4437 3933 2579 5722 9512 3117 1742 5362 2068 1853 4069 9231 1126 3991 420 2571 5517 3063 7279 8085 6111 5503 5980 50 6003 244 9684 6343 6517 1598 5223 5520 982 3932 1093 1149 7...

output:

7206566
7596288

result:

wrong answer 1st numbers differ - expected: '3061429', found: '7206566'