#include <bits/stdc++.h>
using namespace std;
#define pb push_back
#define F first
#define S second
#define int long long
#define ull unsigned long long
#define all(x) x.begin(), x.end()
#define speed ios_base::sync_with_stdio(false), cin.tie(NULL), cout.tie(NULL)
#define file freopen("palindrome.in", "r", stdin), freopen("palindrome.out", "w", stdout);
const int N = (int) 5 * 1e5, inf = INT_MAX;
int a[2000], b[2000];
main() {
speed;
int n, S;
cin >> n >> S;
vector<pair<int, int>> v;
for(int i = 1; i <= n; i++){
cin >> a[i];
b[i] = a[i];
}
sort(b + 1, b + 1 + n);
for(int i = n; i >= 1; i--){
if(b[i] == a[i]){
continue;
}
int x;
for(int j = 1; j <= n; j++){
if(a[j] == b[i]){
x = j;
break;
}
}
while(x != i){
v.pb({x + 1, x});
v.pb({x, x + 1});
v.pb({x + 1, x});
swap(a[x], a[x + 1]);
x++;
}
}
cout << v.size() << "\n";
for(int i = 1; i <= v.size(); i++){
cout << v[i].F << " " << v[i].S << '\n';
}
}
Compilation message
xorsort.cpp:13:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
13 | main() {
| ^~~~
xorsort.cpp: In function 'int main()':
xorsort.cpp:43:22: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
43 | for(int i = 1; i <= v.size(); i++){
| ~~^~~~~~~~~~~
xorsort.cpp:27:10: warning: 'x' may be used uninitialized in this function [-Wmaybe-uninitialized]
27 | int x;
| ^
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
1 ms |
212 KB |
Integer 0 violates the range [1, 5] |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
1 ms |
212 KB |
Integer 0 violates the range [1, 5] |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
1 ms |
212 KB |
Integer 0 violates the range [1, 5] |
| 2 |
Halted |
0 ms |
0 KB |
- |
