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IDProblemSubmitterResultTimeMemoryLanguageFile sizeSubmit timeJudge time
#296212#6307. Chase Game 2fhq_treapWA 10ms15512kbC++14753b2024-01-02 14:35:042024-01-02 14:35:04

Judging History

你现在查看的是最新测评结果

  • [2024-01-02 14:35:04]
  • 评测
  • 测评结果：WA
  • 用时：10ms
  • 内存：15512kb
查看
  • [2024-01-02 14:35:04]
  • 提交

answer

//晦暗的宇宙，我们找不到光，看不见` 尽头，但我们永远都不会被黑色打倒。——Quinn葵因
#include<bits/stdc++.h>
#define ll long long
#define N 500005

int n;
int T;
using std::vector;
vector<int>G[N];

int main(){
    scanf("%d",&T);
    while(T -- ){
        scanf("%d",&n);
        for(int i = 1;i <= n;++i)G[i].clear();
        for(int i = 1;i < n;++i){
            int x,y;
            scanf("%d%d",&x,&y);
            G[x].push_back(x),G[y].push_back(x);
        }
        int cnt = 0;
        bool flag = 0;
        for(int i = 1;i <= n;++i)flag |= (G[i].size() == n - 1),cnt += (G[i].size() == 1);
        if(flag)puts("-1");
        else std::cout<<cnt - 1<<"\n";
    }
    return 0;
}
Source code, Language: C++14

Details

Tip: Click on the bar to expand more detailed information

Test #1:

score: 100
Accepted
time: 0ms
memory: 15420kb

input:

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

output:

-1
1
-1
2

result:

ok 4 number(s): "-1 1 -1 2"

Test #2:

score: 0
Accepted
time: 3ms
memory: 15512kb

input:

10000
4
1 2
1 3
3 4
4
1 2
1 3
1 4
4
1 2
2 3
1 4
5
1 2
2 3
1 4
4 5
5
1 2
2 3
3 4
4 5
4
1 2
2 3
2 4
5
1 2
1 3
2 4
2 5
4
1 2
2 3
1 4
5
1 2
1 3
2 4
1 5
5
1 2
2 3
3 4
2 5
5
1 2
1 3
2 4
2 5
4
1 2
1 3
3 4
5
1 2
1 3
3 4
1 5
4
1 2
1 3
1 4
5
1 2
1 3
3 4
3 5
5
1 2
2 3
3 4
3 5
4
1 2
1 3
2 4
5
1 2
2 3
2 4
3 5
5
...

output:

1
-1
1
1
1
-1
2
1
2
2
2
1
2
-1
2
2
1
2
2
1
1
1
-1
2
2
2
1
-1
1
1
2
1
1
-1
1
2
1
1
1
-1
1
1
2
2
2
1
1
1
-1
1
2
1
1
2
1
2
1
1
2
-1
-1
-1
2
2
2
1
1
1
2
2
2
-1
1
2
-1
1
1
-1
2
-1
-1
1
2
2
2
1
1
1
1
1
1
1
1
1
2
-1
1
1
2
-1
2
1
1
1
-1
2
-1
1
-1
-1
2
-1
2
1
2
2
1
1
1
1
2
1
1
1
1
-1
2
1
2
1
1
1
1
1
1
1
2
-1...

result:

ok 10000 numbers

Test #3:

score: -100
Wrong Answer
time: 10ms
memory: 15484kb

input:

10000
9
1 2
2 3
3 4
4 5
1 6
6 7
5 8
7 9
9
1 2
2 3
2 4
1 5
2 6
4 7
6 8
1 9
9
1 2
2 3
1 4
4 5
5 6
4 7
2 8
1 9
10
1 2
2 3
1 4
3 5
3 6
2 7
6 8
6 9
6 10
10
1 2
1 3
3 4
2 5
1 6
5 7
4 8
2 9
7 10
10
1 2
2 3
2 4
1 5
3 6
6 7
5 8
4 9
9 10
9
1 2
2 3
2 4
1 5
3 6
2 7
1 8
2 9
9
1 2
1 3
2 4
1 5
3 6
3 7
7 8
8 9
10
1...

output:

1
4
4
5
3
2
5
3
4
3
4
3
4
3
4
4
4
3
4
3
5
3
4
4
3
3
4
5
4
5
4
4
3
5
4
5
5
4
5
4
3
4
4
4
4
5
2
5
4
4
4
5
4
2
5
2
4
3
3
4
4
6
4
5
4
4
3
3
4
2
3
3
5
4
3
4
5
3
5
4
4
5
3
5
3
3
4
5
5
4
3
4
4
3
4
5
4
4
4
3
4
3
3
5
5
4
4
2
3
5
3
4
6
3
6
4
2
4
4
3
5
3
4
5
4
4
3
2
5
5
4
3
4
4
4
4
5
4
3
5
4
3
3
6
4
5
4
4
3
4
...

result:

wrong answer 2nd numbers differ - expected: '3', found: '4'
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