QOJ.ac
QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#459080 | #8838. Jesse's Job | ucup-team3474# | WA | 1ms | 6164kb | C++23 | 1.7kb | 2024-06-29 22:12:01 | 2024-06-29 22:12:02 |
Judging History
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)