QOJ.ac

QOJ

IDProblemSubmitterResultTimeMemoryLanguageFile sizeSubmit timeJudge time
#571592#9313. Make MaxrainbowsWA 199ms24724kbC++171.8kb2024-09-18 00:57:042024-09-18 00:57:04

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 00:57:04]
  • 评测
  • 测评结果:WA
  • 用时:199ms
  • 内存:24724kb
  • [2024-09-18 00:57:04]
  • 提交

answer

#include <iostream>
#include <bits/stdc++.h>

using namespace std;


int main() {
    ios::sync_with_stdio(0), cin.tie(0), cout.tie(0);
    int t;
    cin >> t;
    while (t > 0) {
        int n;
        cin >> n;
        vector<long> arr(n);
        unordered_map<long, int> first, last;

        for (int i = 0; i < n; i++) {
            cin >> arr[i];
            last[arr[i]] = i;
        }
        for (int i = n - 1; i >= 0; i--) {
            first[arr[i]] = i;
        }

        stack<int> stack;
        vector<int> left(n, -1);
        vector<int> right(n, n);

        // Find left limits
        for (int i = 0; i < n; i++) {
            if (!stack.empty() && arr[i] < arr[stack.top()]) {
                left[i] = stack.top();
            } else {
                stack.push(i);
            }

        }

        // Clear stack for right limits
        while (!stack.empty()) {
            stack.pop();
        }

        // Find right limits
        for (int i = 0; i < n; i++) {
            while (!stack.empty() && arr[i] > arr[stack.top()]) {
                right[stack.top()] = i;
                stack.pop();
            }
            stack.push(i);
        }

        long long ans = 0;
        for (const auto &entry: first) {
            int index = entry.second;
            if (left[index] != -1) {
                ans += index - left[index] - 1;
            } else {
                ans += index;
            }
        }
        for (const auto &entry: last) {
            int index = entry.second;
            if (right[index] != n) {
                ans += right[index] - index - 1;
            } else {
                ans += n - 1 - index;
            }
        }
        cout << ans << endl;
        t--;
    }
    return 0;
}

Details

Tip: Click on the bar to expand more detailed information

Test #1:

score: 100
Accepted
time: 1ms
memory: 3820kb

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: -100
Wrong Answer
time: 199ms
memory: 24724kb

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:

8064432818
12294547488

result:

wrong answer 1st numbers differ - expected: '4084978', found: '8064432818'