#include <bits/stdc++.h>
#define F first
#define S second
#define pii pair<int, int>
#define pb push_back
using namespace std;
typedef long long ll;
typedef long double ld;
const int N = 2e5 + 10;
set<int> st;
int a[N], b[N];
int main(){
ios_base::sync_with_stdio(0); cin.tie(0);
int n; cin >> n;
for(int i=1; i<2*n; i++)
st.insert(i);
for(int i=0; i<n; i++){
cin >> a[i];
if(i == 0){
b[i] = a[i];
st.erase(a[i]);
}
else{
if(st.find(a[i]) != st.end()){
if(a[i] > a[i - 1]){
b[2*i] = a[i];
st.erase(a[i]);
b[2*i - 1] = *(st.rbegin());
st.erase(*st.rbegin());
}else if(a[i] < a[i - 1]){
b[2*i] = a[i];
st.erase(a[i]);
b[2*i - 1] = *(st.begin());
st.erase(st.begin());
}
}
else{
if(a[i] == a[i - 1]){
b[2*i] = *st.begin();
st.erase(st.begin());
b[2*i - 1] = *(st.rbegin());
st.erase(*st.rbegin());
}else if(a[i] < a[i - 1]){
b[2*i] = *st.begin();
st.erase(st.begin());
b[2*i - 1] = *st.begin();
st.erase(st.begin());
}else{
b[2*i] = *st.rbegin();
st.erase(*st.rbegin());
b[2*i - 1] = *st.rbegin();
st.erase(*st.rbegin());
}
}
}
}
for(int i=0; i<2*n - 1; i++)
cout << b[i] << ' '; cout << endl;
}
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
0 ms |
3744 KB |
Output is correct |
2 |
Correct |
0 ms |
3744 KB |
Output is correct |
3 |
Correct |
0 ms |
3744 KB |
Output is correct |
4 |
Correct |
0 ms |
3744 KB |
Output is correct |
5 |
Correct |
0 ms |
3744 KB |
Output is correct |
6 |
Correct |
0 ms |
3744 KB |
Output is correct |
7 |
Correct |
0 ms |
3744 KB |
Output is correct |
8 |
Correct |
0 ms |
3744 KB |
Output is correct |
9 |
Correct |
0 ms |
3744 KB |
Output is correct |
10 |
Correct |
0 ms |
3744 KB |
Output is correct |
11 |
Correct |
0 ms |
3744 KB |
Output is correct |
12 |
Correct |
0 ms |
3744 KB |
Output is correct |
13 |
Runtime error |
0 ms |
3744 KB |
Execution killed because of forbidden syscall writev (20) |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Runtime error |
0 ms |
3876 KB |
Execution killed because of forbidden syscall writev (20) |
2 |
Runtime error |
3 ms |
4140 KB |
Execution killed because of forbidden syscall writev (20) |
3 |
Runtime error |
3 ms |
4404 KB |
Execution killed because of forbidden syscall writev (20) |
4 |
Runtime error |
13 ms |
5196 KB |
Execution killed because of forbidden syscall writev (20) |
5 |
Runtime error |
26 ms |
6648 KB |
Execution killed because of forbidden syscall writev (20) |
6 |
Runtime error |
53 ms |
9684 KB |
Execution killed because of forbidden syscall writev (20) |
7 |
Runtime error |
99 ms |
13116 KB |
Execution killed because of forbidden syscall writev (20) |