Submission #370791

#	Time	Username	Problem	Language	Result	Execution time	Memory
370791		sad	Cat (info1cup19_cat)	C++14	0 / 100	46 ms	876 KiB

cat

#include <bits/stdc++.h>
#define pb push_back
#define ll long long
#define fi first
#define se second
using namespace std;
vector<int>v,vv;int n;
vector<pair<int,int>>w;
int main()
{
    int t;cin>>t;
    while(t--)
    {
        cin>>n;v.clear();vv.clear();
        for(int i=0;i<n/2;i++)
        {
            int x;cin>>x;
            v.pb(x);
        }
        for(int i=0;i<n/2;i++)
        {
            int x;cin>>x;
            x-=n/2;
            vv.pb(x);
        }int re=1;
        reverse(vv.begin(),vv.end());
        for(int i=0;i<n/2;i++)
        {
            if(v[i]!=vv[i])re=0;
        }
        if(re==0)
        {
            cout<<-1<<endl;continue;
        }
        re=0;n/=2;
        for(int i=0;i<n;i++)
        {
            for(int j=i+1;j<n;j++)
            {
                if(v[i]==j+1)
                {
                    re++;
                    w.pb({i+1,j+1});
                    swap(v[i],v[j]);
                }
            }
        }
        cout<<re<<" "<<re<<endl;
        for(auto it:w)cout<<it.fi<<" "<<it.se<<endl;
        w.clear();
    }
}

• Subtask 1: 0 / 15
• Subtask 2: 0 / 10
• Subtask 3: 0 / 25
• Subtask 4: 0 / 15
• Subtask 5: 0 / 35