Submission #950283

#	Time	Username	Problem	Language	Result	Execution time	Memory
950283		pcc	Cat (info1cup19_cat)	C++17	15 / 100	195 ms	17748 KiB

cat

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

#define ll long long
#define pll pair<ll,ll>
#define pii pair<int,int>
#define fs first
#define sc second
#define tlll tuple<ll,ll,ll>


const int mxn = 3e6+10;
int N;
int arr[mxn];

void solve(){
	cin>>N;
	for(int i = 1;i<=N;i++)cin>>arr[i];
	int f = 0;
	for(int i = 1;i+i<=N;i++){
		if(arr[i]+arr[N-i+1] != N+1){
			cout<<"-1\n";
			return;
		}
		if(arr[i]>arr[N-i+1])f++;
	}
	if(f&1)cout<<"-1\n";
	else{
		cout<<"0 0\n";
	}
	return;
}

int main(){
	ios::sync_with_stdio(0);cin.tie(0);cout.tie(0);
	int t;
	cin>>t;
	while(t--)solve();
}

• Subtask 1: 2.25 / 15
• Subtask 2: 1.5 / 10
• Subtask 3: 3.75 / 25
• Subtask 4: 2.25 / 15
• Subtask 5: 5.25 / 35