oj.uz

Submission #370815

# Submission time Handle Problem Language Result Execution time Memory
370815 2021-02-24T17:10:47 Z sad Cat (info1cup19_cat) C++14
10 / 100
 1000 ms 2704 KB 
#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 a[1000000];
int main()
{
    int t;cin>>t;
    while(t--)
    {
        int n;
        cin>>n;int re=0;
        for(int i=1;i<=n;i++)cin>>a[i];
        for(int i=1;i<=n;i++)
        {
            if(a[i]==i)continue;
            for(int j=i+1;j<=n;j++)
            {
                if(a[j]==i)
                {
                    re++;
                    w.pb({i,j});
                    swap(a[i],a[j]);
                    swap(a[n-i+1],a[n+1-j]);break;
                }
            }
        }
        for(int i=1;i<=n;i++)if(a[i]!=i)re=-1;
        if(re==-1)
        {
            cout<<-1<<endl;w.clear();continue;
        }
        cout<<0<<" "<<w.size()<<endl;
        for(auto it:w)
        if(it.fi==it.se)continue;
        else cout<<it.fi<<" "<<it.se<<endl;
        w.clear();
    }
}

Subtask #1
0.0 / 15.0

# Verdict Execution time Memory Grader output
1 Incorrect 20 ms 364 KB Wrong answer

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 140 ms 620 KB Output is correct
2 Correct 139 ms 620 KB Output is correct

Subtask #3
0.0 / 25.0

# Verdict Execution time Memory Grader output
1 Incorrect 20 ms 364 KB Wrong answer

Subtask #4
0.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 140 ms 620 KB Output is correct
2 Correct 139 ms 620 KB Output is correct
3 Execution timed out 1095 ms 2704 KB Time limit exceeded
4 Halted 0 ms 0 KB -

Subtask #5
0.0 / 35.0

# Verdict Execution time Memory Grader output
1 Incorrect 20 ms 364 KB Wrong answer