#include <bits/stdc++.h>
using namespace std;
void solve() {
int n,a,br = 0;
cin >> n;
vector<int> p(n+1);
for(int i = 1; i <= n; i++) {
cin >> a;
p[a] = i;
}
for(int i = 1; i <= n/2; i++) {
if(p[i] > p[n-i+1]) {
br++;
}
if(p[i] != n-p[n-i+1]+1) {
cout << -1 << "\n";
return;
}
}
if(br%2) {
cout << -1 << "\n";
return;
}
cout << 1 << " " << 0 << "\n";
}
int main()
{
ios_base::sync_with_stdio(false);
cin.tie(NULL);
cout.tie(NULL);
int t;
cin >> t;
while(t--) {
solve();
}
return 0;
}
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
2 ms |
212 KB |
Correctly distinguished between possibility and impossibility |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
9 ms |
340 KB |
Correctly distinguished between possibility and impossibility |
2 |
Correct |
9 ms |
340 KB |
Correctly distinguished between possibility and impossibility |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
2 ms |
212 KB |
Correctly distinguished between possibility and impossibility |
2 |
Correct |
9 ms |
340 KB |
Correctly distinguished between possibility and impossibility |
3 |
Correct |
9 ms |
340 KB |
Correctly distinguished between possibility and impossibility |
4 |
Correct |
9 ms |
720 KB |
Correctly distinguished between possibility and impossibility |
5 |
Correct |
4 ms |
468 KB |
Correctly distinguished between possibility and impossibility |
6 |
Correct |
4 ms |
468 KB |
Correctly distinguished between possibility and impossibility |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
9 ms |
340 KB |
Correctly distinguished between possibility and impossibility |
2 |
Correct |
9 ms |
340 KB |
Correctly distinguished between possibility and impossibility |
3 |
Correct |
160 ms |
812 KB |
Correctly distinguished between possibility and impossibility |
4 |
Correct |
162 ms |
880 KB |
Correctly distinguished between possibility and impossibility |
5 |
Correct |
157 ms |
1136 KB |
Correctly distinguished between possibility and impossibility |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
2 ms |
212 KB |
Correctly distinguished between possibility and impossibility |
2 |
Correct |
9 ms |
340 KB |
Correctly distinguished between possibility and impossibility |
3 |
Correct |
9 ms |
340 KB |
Correctly distinguished between possibility and impossibility |
4 |
Correct |
9 ms |
720 KB |
Correctly distinguished between possibility and impossibility |
5 |
Correct |
4 ms |
468 KB |
Correctly distinguished between possibility and impossibility |
6 |
Correct |
4 ms |
468 KB |
Correctly distinguished between possibility and impossibility |
7 |
Correct |
160 ms |
812 KB |
Correctly distinguished between possibility and impossibility |
8 |
Correct |
162 ms |
880 KB |
Correctly distinguished between possibility and impossibility |
9 |
Correct |
157 ms |
1136 KB |
Correctly distinguished between possibility and impossibility |
10 |
Correct |
176 ms |
14016 KB |
Correctly distinguished between possibility and impossibility |
11 |
Correct |
164 ms |
14236 KB |
Correctly distinguished between possibility and impossibility |
12 |
Correct |
188 ms |
16268 KB |
Correctly distinguished between possibility and impossibility |
13 |
Correct |
170 ms |
15620 KB |
Correctly distinguished between possibility and impossibility |
14 |
Correct |
169 ms |
16192 KB |
Correctly distinguished between possibility and impossibility |