#include<bits/stdc++.h>
using namespace std;
vector<pair<int, int>> tt;
int a[1001], re[1001];
void op(int i, int j)
{
tt.push_back(make_pair(i, j));
a[i] ^= a[j];
}
bool getbit(int num, int bit)
{
return (num >> bit)&1;
}
int main()
{
ios_base::sync_with_stdio(false);
cin.tie(0);
int n, s;
cin>>n>>s;
for(int i = 1; i <= n; i++) cin>>a[i];
if(s == 2){
int last = n;
for(int bit = 19; bit >= 0; bit--){
int c = 0;
for(int i = 1; i <= last; i++) if(getbit(a[i], bit) == 1) c = i;
if(c == 0) continue;
for(int i = c-1; i >= 1; i--) if(getbit(a[i], bit) == 0) op(i, i+1);
for(int i = c+1; i <= last; i++) if(getbit(a[i], bit) == 0) op(i, i-1);
for(int i = 2; i <= last; i++) op(i-1, i);
last--;
}
}
else{
for(int i = 1; i <= n; i++) re[i] = a[i];
for(int i = 1; i < n; i++) op(i, i+1);
int cur = n;
for(int i = 1; i <= n; i++){
int place = 1;
for(int j = 2; j <= cur; j++) if(re[place] < re[j]) place = j;
for(int j = place; j < cur; j++) op(j+1, j);
for(int j = max(place-1, 1); j < cur; j++) op(j, j+1);
for(int j = place; j < cur; j++) swap(re[j], re[j+1]);
cur--;
}
}
/*for(int i = 1; i <= n; i++) cout<<a[i]<<" ";
cout<<'\n';*/
cout<<tt.size()<<'\n';
for(int i = 0; i < tt.size(); i++) cout<<tt[i].first<<" "<<tt[i].second<<'\n';
}
Compilation message
xorsort.cpp: In function 'int main()':
xorsort.cpp:49:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
49 | for(int i = 0; i < tt.size(); i++) cout<<tt[i].first<<" "<<tt[i].second<<'\n';
| ~~^~~~~~~~~~~
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
0 ms |
212 KB |
Output is correct |
| 2 |
Correct |
1 ms |
212 KB |
Output is correct |
| 3 |
Correct |
1 ms |
324 KB |
Output is correct |
| 4 |
Correct |
2 ms |
596 KB |
Output is correct |
| 5 |
Correct |
2 ms |
584 KB |
Output is correct |
| 6 |
Correct |
2 ms |
596 KB |
Output is correct |
| 7 |
Correct |
2 ms |
596 KB |
Output is correct |
| 8 |
Correct |
2 ms |
596 KB |
Output is correct |
| 9 |
Correct |
2 ms |
596 KB |
Output is correct |
| 10 |
Correct |
3 ms |
580 KB |
Output is correct |
| 11 |
Correct |
1 ms |
212 KB |
Output is correct |
| 12 |
Correct |
3 ms |
728 KB |
Output is correct |
| 13 |
Correct |
3 ms |
728 KB |
Output is correct |
| 14 |
Correct |
3 ms |
728 KB |
Output is correct |
| 15 |
Correct |
3 ms |
728 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
0 ms |
212 KB |
Output is correct |
| 2 |
Correct |
1 ms |
212 KB |
Output is correct |
| 3 |
Correct |
1 ms |
324 KB |
Output is correct |
| 4 |
Correct |
2 ms |
596 KB |
Output is correct |
| 5 |
Correct |
2 ms |
584 KB |
Output is correct |
| 6 |
Correct |
2 ms |
596 KB |
Output is correct |
| 7 |
Correct |
2 ms |
596 KB |
Output is correct |
| 8 |
Correct |
2 ms |
596 KB |
Output is correct |
| 9 |
Correct |
2 ms |
596 KB |
Output is correct |
| 10 |
Correct |
3 ms |
580 KB |
Output is correct |
| 11 |
Correct |
1 ms |
212 KB |
Output is correct |
| 12 |
Correct |
3 ms |
728 KB |
Output is correct |
| 13 |
Correct |
3 ms |
728 KB |
Output is correct |
| 14 |
Correct |
3 ms |
728 KB |
Output is correct |
| 15 |
Correct |
3 ms |
728 KB |
Output is correct |
| 16 |
Correct |
1 ms |
324 KB |
Output is correct |
| 17 |
Correct |
2 ms |
576 KB |
Output is correct |
| 18 |
Correct |
4 ms |
728 KB |
Output is correct |
| 19 |
Correct |
3 ms |
728 KB |
Output is correct |
| 20 |
Correct |
3 ms |
716 KB |
Output is correct |
| 21 |
Correct |
4 ms |
728 KB |
Output is correct |
| 22 |
Correct |
3 ms |
712 KB |
Output is correct |
| 23 |
Correct |
3 ms |
728 KB |
Output is correct |
| 24 |
Correct |
3 ms |
728 KB |
Output is correct |
| 25 |
Correct |
3 ms |
712 KB |
Output is correct |
| 26 |
Correct |
5 ms |
984 KB |
Output is correct |
| 27 |
Correct |
5 ms |
984 KB |
Output is correct |
| 28 |
Correct |
5 ms |
984 KB |
Output is correct |
| 29 |
Correct |
5 ms |
984 KB |
Output is correct |
| 30 |
Correct |
5 ms |
984 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
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 |
1 ms |
468 KB |
Output is correct |
| 5 |
Correct |
4 ms |
856 KB |
Output is correct |
| 6 |
Correct |
9 ms |
828 KB |
Output is correct |
| 7 |
Correct |
5 ms |
856 KB |
Output is correct |
| 8 |
Correct |
4 ms |
856 KB |
Output is correct |
| 9 |
Correct |
4 ms |
856 KB |
Output is correct |
| 10 |
Correct |
4 ms |
856 KB |
Output is correct |
| 11 |
Correct |
4 ms |
856 KB |
Output is correct |
| 12 |
Correct |
4 ms |
980 KB |
Output is correct |
| 13 |
Correct |
4 ms |
856 KB |
Output is correct |
| 14 |
Correct |
4 ms |
856 KB |
Output is correct |
| 15 |
Correct |
5 ms |
984 KB |
Output is correct |
