oj.uz

Submission #372897

# Submission time Handle Problem Language Result Execution time Memory
372897 2021-03-02T08:11:36 Z Traduttore Xor Sort (eJOI20_xorsort) C++14
60 / 100
 1000 ms 16980 KB 
#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
#define ll long long
#define ld long double
#define pll pair <ll,ll>
#define F first
#define S second
#define int ll
#define pb push_back
#define IOS ios_base::sync_with_stdio(0),cin.tie(0),cout.tie(0)
using namespace std;
using namespace __gnu_pbds;
typedef tree <pll,null_type,less <pll>,rb_tree_tag,tree_order_statistics_node_update> orduk;
typedef tree <ll,null_type,less <ll>,rb_tree_tag,tree_order_statistics_node_update> orduk2;
ll n,type;
vector <ll> a;
inline void init() {
    cin>>n>>type;
    a.resize(n);
    for (int i = 0;i < n;i++)
        cin>>a[i];
}
vector <pll> ans;
inline void output() {
    cout<<ans.size()<<'\n';
    for (auto to:ans)
        cout<<to.F<<" "<<to.S<<'\n';
    exit(0);
}
inline void solve() {
	int mn = 2e9;
	vector <pll> ans2;
	for (int j = 0;j < n;j++) {
		vector <int> aa;
		aa = a;
	for (int i = 0;i < n;i++)
	if (i != j) a[i]^=a[j];
	ans.clear();
	vector <int> ab;
	ab = aa;
	for (int i = j + 1;i < n;i++)
	{
		ans.pb({i + 1,i});
		ab[i]^=ab[i - 1];
	}
	for (int i = j - 1;i >= 0;i--)
	{
		ans.pb({i + 1,i + 2});
		ab[i]^=ab[i + 1];
	}
	a = ab;
	unordered_map <int,int> mp;
	bool YY = true;
	for (int i = 0;i < n;i++)
	{
		if (mp[a[i]]) {YY = false;break;}
		++mp[a[i]];
	}
	if (YY == false) {
		a = aa;
		continue;
	}
    while (1) {
        bool found = true;
        int mx = -1;
        int pos = -1;
        for (int i = 0;i < n - 1;i++)
        if (a[i] > a[i + 1]) {
        	pos = i;
        	break;
        }
        if (pos < 0) break;
            ans.pb({pos + 2,pos + 1});
            ans.pb({pos + 1, pos + 2});
            ans.pb({pos + 2,pos + 1});
            swap(a[pos],a[pos + 1]);
    }
    if (ans.size() <= 40000) {
    	return;
    }
    a = aa;
}
ans = ans2;
}
 
int32_t main() {
//freopen("input.txt","r",stdin);
//freopen("output.txt","w",stdout);
IOS;
int m;
m = 10;
m-=9;
while (m--)
{
    init();
    solve();
    output();
}
}
/*written by Traduttore*/
/*waiting for a miracle...*/

Compilation message

xorsort.cpp: In function 'void solve()':
xorsort.cpp:65:14: warning: unused variable 'found' [-Wunused-variable]
   65 |         bool found = true;
      |              ^~~~~
xorsort.cpp:66:13: warning: unused variable 'mx' [-Wunused-variable]
   66 |         int mx = -1;
      |             ^~
xorsort.cpp:32:6: warning: unused variable 'mn' [-Wunused-variable]
   32 |  int mn = 2e9;
      |      ^~

Subtask #1
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 1 ms 364 KB Output is correct
3 Correct 1 ms 364 KB Output is correct
4 Correct 4 ms 1012 KB Output is correct
5 Correct 4 ms 884 KB Output is correct
6 Correct 4 ms 1012 KB Output is correct
7 Correct 5 ms 1012 KB Output is correct
8 Correct 4 ms 756 KB Output is correct
9 Correct 5 ms 1012 KB Output is correct
10 Correct 4 ms 1012 KB Output is correct
11 Correct 3 ms 756 KB Output is correct
12 Correct 5 ms 1012 KB Output is correct
13 Correct 7 ms 1012 KB Output is correct
14 Correct 5 ms 1012 KB Output is correct
15 Correct 4 ms 1012 KB Output is correct

Subtask #2
35.0 / 35.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 1 ms 364 KB Output is correct
3 Correct 1 ms 364 KB Output is correct
4 Correct 4 ms 1012 KB Output is correct
5 Correct 4 ms 884 KB Output is correct
6 Correct 4 ms 1012 KB Output is correct
7 Correct 5 ms 1012 KB Output is correct
8 Correct 4 ms 756 KB Output is correct
9 Correct 5 ms 1012 KB Output is correct
10 Correct 4 ms 1012 KB Output is correct
11 Correct 3 ms 756 KB Output is correct
12 Correct 5 ms 1012 KB Output is correct
13 Correct 7 ms 1012 KB Output is correct
14 Correct 5 ms 1012 KB Output is correct
15 Correct 4 ms 1012 KB Output is correct
16 Correct 1 ms 364 KB Output is correct
17 Correct 4 ms 1012 KB Output is correct
18 Correct 9 ms 1412 KB Output is correct
19 Correct 7 ms 1136 KB Output is correct
20 Correct 9 ms 1264 KB Output is correct
21 Correct 8 ms 1136 KB Output is correct
22 Correct 8 ms 1136 KB Output is correct
23 Correct 7 ms 1136 KB Output is correct
24 Correct 8 ms 1264 KB Output is correct
25 Correct 8 ms 1136 KB Output is correct
26 Correct 10 ms 1520 KB Output is correct
27 Correct 9 ms 1520 KB Output is correct
28 Correct 8 ms 1264 KB Output is correct
29 Correct 9 ms 1520 KB Output is correct
30 Correct 7 ms 1520 KB Output is correct

Subtask #3
0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 1 ms 364 KB Output is correct
3 Correct 1 ms 492 KB Output is correct
4 Correct 7 ms 1136 KB Output is correct
5 Execution timed out 1076 ms 16980 KB Time limit exceeded
6 Halted 0 ms 0 KB -