oj.uz

Submission #466420

# Submission time Handle Problem Language Result Execution time Memory
466420 2021-08-19T07:38:34 Z daisy Xor Sort (eJOI20_xorsort) C++17
100 / 100
 11 ms 1008 KB 
#include<iostream>
#include<vector>
#include<algorithm>
#define endl '\n'
using namespace std;
int n,s,p[1005];
pair<int,int> m[1005];
vector< pair<int,int> > v;
bool cmp(pair<int,int> a, pair<int,int> b)
{
    return a.first>b.first;
}
int main()
{
    ios::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);

    cin>>n>>s;

    for(int i=1;i<=n;i++){
        cin>>m[i].first;
        m[i].second=i;
     }

    if(s==2){
    for(int i=1;i<=(1<<20);i*=2)
    {
        for(int j=1;j<n;j++)
        {
            if((i&m[j].first))
            {
                if(!(i&m[j+1].first))
                {
                    v.push_back({j+1,j});
                    m[j+1].first^=m[j].first;
                }

                    v.push_back({j,j+1});
                    m[j].first^=m[j+1].first;
            }
        }
    }
    }

    if(s==1){
    sort(m+1,m+n+1,cmp);
     int t;

    for(int i=1;i<=n;i++)
    {
        t=m[i].second-p[m[i].second];
        for(int j=m[i].second+1;j<=n;j++) p[j]++;

        for(int j=1;j<=min(n-1,n-i+1);j++)
        {
            v.push_back({j,j+1});
        }
        for(int j=t+1;j<=n-i+1;j++)
        {
            v.push_back({j,j-1});
        }
        for(int j=t-2;j>=1;j--)
        {
            v.push_back({j,j+1});
        }
    }
}

  cout<<v.size()<<endl;

   for(int i=0;i<v.size();i++)
   {
       cout<<v[i].first<<" "<<v[i].second<<endl;
   }

}

Compilation message

xorsort.cpp: In function 'int main()':
xorsort.cpp:72:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   72 |    for(int i=0;i<v.size();i++)
      |                ~^~~~~~~~~

Subtask #1
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 1 ms 332 KB Output is correct
4 Correct 5 ms 720 KB Output is correct
5 Correct 6 ms 712 KB Output is correct
6 Correct 5 ms 720 KB Output is correct
7 Correct 5 ms 720 KB Output is correct
8 Correct 5 ms 720 KB Output is correct
9 Correct 5 ms 720 KB Output is correct
10 Correct 5 ms 720 KB Output is correct
11 Correct 5 ms 720 KB Output is correct
12 Correct 5 ms 752 KB Output is correct
13 Correct 5 ms 720 KB Output is correct
14 Correct 5 ms 720 KB Output is correct
15 Correct 5 ms 720 KB Output is correct

Subtask #2
35.0 / 35.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 1 ms 332 KB Output is correct
4 Correct 5 ms 720 KB Output is correct
5 Correct 6 ms 712 KB Output is correct
6 Correct 5 ms 720 KB Output is correct
7 Correct 5 ms 720 KB Output is correct
8 Correct 5 ms 720 KB Output is correct
9 Correct 5 ms 720 KB Output is correct
10 Correct 5 ms 720 KB Output is correct
11 Correct 5 ms 720 KB Output is correct
12 Correct 5 ms 752 KB Output is correct
13 Correct 5 ms 720 KB Output is correct
14 Correct 5 ms 720 KB Output is correct
15 Correct 5 ms 720 KB Output is correct
16 Correct 0 ms 204 KB Output is correct
17 Correct 5 ms 720 KB Output is correct
18 Correct 8 ms 976 KB Output is correct
19 Correct 8 ms 976 KB Output is correct
20 Correct 8 ms 956 KB Output is correct
21 Correct 8 ms 976 KB Output is correct
22 Correct 8 ms 1008 KB Output is correct
23 Correct 11 ms 1004 KB Output is correct
24 Correct 8 ms 976 KB Output is correct
25 Correct 9 ms 988 KB Output is correct
26 Correct 8 ms 976 KB Output is correct
27 Correct 8 ms 976 KB Output is correct
28 Correct 8 ms 976 KB Output is correct
29 Correct 8 ms 976 KB Output is correct
30 Correct 8 ms 976 KB Output is correct

Subtask #3
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 1 ms 320 KB Output is correct
4 Correct 2 ms 460 KB Output is correct
5 Correct 7 ms 888 KB Output is correct
6 Correct 8 ms 860 KB Output is correct
7 Correct 6 ms 836 KB Output is correct
8 Correct 6 ms 848 KB Output is correct
9 Correct 7 ms 848 KB Output is correct
10 Correct 6 ms 848 KB Output is correct
11 Correct 6 ms 848 KB Output is correct
12 Correct 7 ms 972 KB Output is correct
13 Correct 7 ms 848 KB Output is correct
14 Correct 7 ms 924 KB Output is correct
15 Correct 8 ms 976 KB Output is correct