oj.uz

Submission #467159

# Submission time Handle Problem Language Result Execution time Memory
467159 2021-08-21T19:41:18 Z TlenekWodoru Xor Sort (eJOI20_xorsort) C++14
25 / 100
 1000 ms 12728 KB 
#include <bits/stdc++.h>
using namespace std;
int tab[1009];
bool zaj[2000000];
vector<pair<int,int>>odp;
int xorr(int a, int b)
{
    int u=1;
    int wynik=0;
    while(a>0||b>0)
    {
        if(a%2!=b%2)
        {
            wynik+=u;
        }
        a=a/2;
        b=b/2;
        u=u*2;
    }
    return wynik;
}
void swap_true(int a, int b)
{
    tab[a]=xorr(tab[a],tab[b]);
}
void swapp(int a, int b)
{
    /**swap_true(a,b);
    swap_true(b,a);
    swap_true(a,b);**/
    odp.push_back({a,b});
    odp.push_back({b,a});
    odp.push_back({a,b});
    swap(tab[a],tab[b]);
}
int main()
{ ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
    srand(time(0));
    int n,s;cin>>n>>s;
    for(int i=1;i<=n;i++)
    {
        cin>>tab[i];
        zaj[tab[i]]=1;
    } 
    for(int i=1;i<=n;i++)  
    {
        int a=(rand()%n)+1;
        int b=rand()%2;
        if(a==1||(b%2==1&&a!=n))
        {
            if(tab[a]>tab[a+1])
            {
                if(s==2||zaj[xorr(tab[a],tab[a+1])]==0)
                {
                    odp.push_back({a,a+1});
                    zaj[tab[a]]=0;
                    swap_true(a,a+1);
                    zaj[tab[a]]=1;
                } 
            }
        }
        else
        {
            if(tab[a]>tab[a-1])
            {
                if(s==2||zaj[xorr(tab[a],tab[a-1])]==0)
                {
                    odp.push_back({a,a-1});
                    zaj[tab[a]]=0;
                    swap_true(a,a-1);
                    zaj[tab[a]]=1;
                }
            }
        }
    }
    for(int i=1;i<=n;i++)
    {
        int minn=2000000000;
        int ind=-1;
        for(int j=i;j<=n;j++)
        {
            if(tab[j]<minn)
            {
                minn=tab[j];
                ind=j;
            }
        }
        for(int j=ind;j-1>=i;j--)
        {
            swapp(j,j-1);
        }
    }
    cout<<odp.size()<<endl;
    for(int i=0;i<odp.size();i++)
    {
        cout<<odp[i].first<<" "<<odp[i].second<<endl;
    }
    /**for(int i=1;i<=n;i++)
    {
        cout<<tab[i]<<endl;
    }**/
    return 0;
}

Compilation message

xorsort.cpp: In function 'int main()':
xorsort.cpp:94:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   94 |     for(int i=0;i<odp.size();i++)
      |                 ~^~~~~~~~~~~

Subtask #1
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 332 KB Output is correct
2 Correct 0 ms 332 KB Output is correct
3 Correct 4 ms 588 KB Output is correct
4 Correct 25 ms 1196 KB Output is correct
5 Correct 30 ms 1248 KB Output is correct
6 Correct 29 ms 1228 KB Output is correct
7 Correct 29 ms 1232 KB Output is correct
8 Correct 28 ms 1228 KB Output is correct
9 Correct 30 ms 1232 KB Output is correct
10 Correct 29 ms 1236 KB Output is correct
11 Correct 15 ms 1076 KB Output is correct
12 Correct 46 ms 1444 KB Output is correct
13 Correct 40 ms 1220 KB Output is correct
14 Correct 41 ms 1244 KB Output is correct
15 Correct 51 ms 1308 KB Output is correct

Subtask #2
0 / 35.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 332 KB Output is correct
2 Correct 0 ms 332 KB Output is correct
3 Correct 4 ms 588 KB Output is correct
4 Correct 25 ms 1196 KB Output is correct
5 Correct 30 ms 1248 KB Output is correct
6 Correct 29 ms 1228 KB Output is correct
7 Correct 29 ms 1232 KB Output is correct
8 Correct 28 ms 1228 KB Output is correct
9 Correct 30 ms 1232 KB Output is correct
10 Correct 29 ms 1236 KB Output is correct
11 Correct 15 ms 1076 KB Output is correct
12 Correct 46 ms 1444 KB Output is correct
13 Correct 40 ms 1220 KB Output is correct
14 Correct 41 ms 1244 KB Output is correct
15 Correct 51 ms 1308 KB Output is correct
16 Correct 1 ms 332 KB Output is correct
17 Correct 32 ms 1288 KB Output is correct
18 Correct 54 ms 1560 KB Output is correct
19 Correct 59 ms 1512 KB Output is correct
20 Correct 53 ms 1540 KB Output is correct
21 Correct 54 ms 1432 KB Output is correct
22 Correct 61 ms 1500 KB Output is correct
23 Correct 64 ms 1556 KB Output is correct
24 Correct 49 ms 1528 KB Output is correct
25 Correct 48 ms 1516 KB Output is correct
26 Incorrect 87 ms 1640 KB Integer 42614 violates the range [0, 40000]
27 Halted 0 ms 0 KB -

Subtask #3
0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 332 KB Output is correct
2 Correct 1 ms 332 KB Output is correct
3 Correct 4 ms 588 KB Output is correct
4 Correct 47 ms 1528 KB Output is correct
5 Execution timed out 1078 ms 12728 KB Time limit exceeded
6 Halted 0 ms 0 KB -