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Submission #775020

# Submission time Handle Problem Language Result Execution time Memory
775020 2023-07-06T06:52:50 Z vjudge1 Xor Sort (eJOI20_xorsort) C++17
25 / 100
 96 ms 12460 KB 
#include <bits/stdc++.h>
using namespace std;

#define pii pair <int, int>
#define fi first
#define se second
#define mp make_pair

const int NM = 1000;

int N, S, a[NM+5];
vector <pii> ans;

void op(int i, int j){
	ans.push_back(mp(i, j));
	a[i] ^= a[j];
}

int main(){
	ios_base::sync_with_stdio(0);
	cin.tie(0);
	cout.tie(0);
	cin >> N >> S;
	for (int i = 1; i <= N; i++) cin >> a[i];
	while (true){
		bool ok = 1;
		for (int i = 1; i < N; i++)
			if (a[i] > a[i+1]){
				ok = 0;
				op(i+1, i);
				op(i, i+1);
				op(i+1, i);
			}
		if (ok) break;
	}
	cout << ans.size() << '\n';
	for (int i = 0; i < ans.size(); i++)
		cout << ans[i].fi << ' ' << ans[i].se << '\n';
	return 0;
}

Compilation message

xorsort.cpp: In function 'int main()':
xorsort.cpp:37:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   37 |  for (int i = 0; i < ans.size(); i++)
      |                  ~~^~~~~~~~~~~~

Subtask #1
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 2 ms 596 KB Output is correct
5 Correct 2 ms 600 KB Output is correct
6 Correct 2 ms 600 KB Output is correct
7 Correct 2 ms 600 KB Output is correct
8 Correct 2 ms 600 KB Output is correct
9 Correct 3 ms 728 KB Output is correct
10 Correct 4 ms 600 KB Output is correct
11 Correct 0 ms 212 KB Output is correct
12 Correct 4 ms 856 KB Output is correct
13 Correct 4 ms 856 KB Output is correct
14 Correct 4 ms 908 KB Output is correct
15 Correct 4 ms 856 KB Output is correct

Subtask #2
0 / 35.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 2 ms 596 KB Output is correct
5 Correct 2 ms 600 KB Output is correct
6 Correct 2 ms 600 KB Output is correct
7 Correct 2 ms 600 KB Output is correct
8 Correct 2 ms 600 KB Output is correct
9 Correct 3 ms 728 KB Output is correct
10 Correct 4 ms 600 KB Output is correct
11 Correct 0 ms 212 KB Output is correct
12 Correct 4 ms 856 KB Output is correct
13 Correct 4 ms 856 KB Output is correct
14 Correct 4 ms 908 KB Output is correct
15 Correct 4 ms 856 KB Output is correct
16 Correct 0 ms 212 KB Output is correct
17 Correct 3 ms 600 KB Output is correct
18 Correct 5 ms 856 KB Output is correct
19 Correct 4 ms 856 KB Output is correct
20 Correct 5 ms 856 KB Output is correct
21 Correct 4 ms 856 KB Output is correct
22 Correct 5 ms 856 KB Output is correct
23 Correct 4 ms 856 KB Output is correct
24 Correct 4 ms 856 KB Output is correct
25 Correct 4 ms 856 KB Output is correct
26 Incorrect 7 ms 1236 KB Integer 59568 violates the range [0, 40000]
27 Halted 0 ms 0 KB -

Subtask #3
0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 4 ms 856 KB Output is correct
5 Incorrect 96 ms 12460 KB Integer 764742 violates the range [0, 40000]
6 Halted 0 ms 0 KB -