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QOJ

IDProblemSubmitterResultTimeMemoryLanguageFile sizeSubmit timeJudge time
#459080#8838. Jesse's Jobucup-team3474#WA 1ms6164kbC++231.7kb2024-06-29 22:12:012024-06-29 22:12:02

Judging History

你现在查看的是最新测评结果

  • [2024-06-29 22:12:02]
  • 评测
  • 测评结果:WA
  • 用时:1ms
  • 内存:6164kb
  • [2024-06-29 22:12:01]
  • 提交

answer

#include <bits/stdc++.h>
using namespace std ;
typedef long long ll;
const int N=1919810,mod=998244353;
int n,m;
char s[N];
int p[N];
bool tf[N];



void __(){
    scanf("%d",&n);
    for(int i=1;i<=n;i++) scanf("%d",&p[i]);
    for(int i=1;i<=n;i++){
        tf[i]=0;
    }
    int cnt=0;
    int root=-1;
    for(int i=1;i<=n;i++){
        if(p[i]==i){
            root=i;
            break;
        }
    }
    vector<int> v;
    for(int i=1;i<=n;i++){
        int pp=i;
        if(tf[i]) continue;
        vector<int> vv; 
        cnt++;
        while(!tf[pp]){
            // cout<<pp<<endl;
            tf[pp]=1;
            vv.push_back(pp);
            pp=p[pp];

        } 
        if(!v.size()) v=vv;
    }
    if(cnt>=2){
        printf("%d\n",n);
        printf("%d\n",v.size());
        for(auto x:v) printf("%d ",x);
        printf("\n");
    }else{
        
        if(root==-1){
            printf("%d\n",n-2);
            for(int i=1;i<=n;i++){
                if(abs(p[i]-i)==1){
                    puts("1");
                    printf("%d\n",i);
                    return;
                }
            }


            
            v.push_back(v[0]);
            for(int i=1;i<v.size();i++){
                int u=v[i],uu=v[i-1];
                if(u>uu) swap(u,uu);
                if(p[u]>p[uu]){
                    printf("2\n");
                    printf("%d %d\n",u,uu);
                    return;
                }
            }
        } 
        else{
            printf("%d\n",n);
            puts("1");
            printf("%d\n",root);
            
        } 
    }

}


int main()
{
    int _;
    cin>>_;
    while(_--){
        __();
    }

}

Details

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Test #1:

score: 100
Accepted
time: 1ms
memory: 6128kb

input:

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

output:

0
1
1
4
2
1 2 
4
1
3

result:

ok Correct (3 test cases)

Test #2:

score: -100
Wrong Answer
time: 1ms
memory: 6164kb

input:

872
6
1 5 2 6 3 4
6
5 2 1 3 4 6
4
2 1 3 4
6
2 3 1 4 5 6
6
4 5 1 6 2 3
6
6 2 3 1 4 5
5
2 1 3 4 5
6
1 2 6 4 3 5
4
2 1 4 3
6
1 6 4 2 5 3
6
6 1 3 5 4 2
6
2 1 4 5 6 3
6
3 4 1 5 6 2
6
4 1 5 3 2 6
6
5 2 1 6 3 4
6
4 1 6 2 5 3
6
5 1 3 6 2 4
6
6 2 5 4 3 1
6
6 2 5 3 1 4
6
5 2 4 1 3 6
6
6 1 3 2 4 5
6
2 3 4 6 5 ...

output:

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

result:

wrong answer Participant didn't find permutation (test case 188)