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IDProblemSubmitterResultTimeMemoryLanguageFile sizeSubmit timeJudge time
#579251#9310. Permutation Counting 4huanmengWA 0ms3496kbC++141.1kb2024-09-21 11:03:232024-09-21 11:03:23

Judging History

你现在查看的是最新测评结果

  • [2024-09-21 11:03:23]
  • 评测
  • 测评结果:WA
  • 用时:0ms
  • 内存:3496kb
  • [2024-09-21 11:03:23]
  • 提交

answer

#include <bits/stdc++.h>
using namespace std;

int main() {
    ios::sync_with_stdio(false);
    cin.tie(0);

    int t;
    cin >> t;
    while (t--) {
        int n;
        cin >> n;

        vector<pair<int, int>> ranges(n);
        for (int i = 0; i < n; i++) {
            int l, r;
            cin >> l >> r;
            ranges[i] = {l, r};
        }

        // 排序区间,先按左端点排序,若左端点相同按右端点排序
        sort(ranges.begin(), ranges.end());

        bool possible = true;
        int used = 1;  // 从1开始分配数值
        for (int i = 0; i < n; i++) {
            if (ranges[i].first > used || ranges[i].second < used) {
                possible = false;  // 如果区间不能容纳当前数字,说明不可能有合法排列
                break;
            }
            used++;  // 为下一个位置分配数值
        }

        if (possible) {
            cout << "1\n";  // 存在合法排列,奇数个
        } else {
            cout << "0\n";  // 不存在合法排列
        }
    }

    return 0;
}

Details

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Test #1:

score: 0
Wrong Answer
time: 0ms
memory: 3496kb

input:

4
5
1 2
1 5
1 2
1 2
2 2
5
1 1
2 4
2 3
5 5
3 4
5
3 5
1 2
3 4
3 5
3 3
5
1 5
1 4
4 5
5 5
1 2

output:

0
1
0
1

result:

wrong answer 4th words differ - expected: '0', found: '1'