#include <bits/stdc++.h>
#include "sorting.h"
using namespace std;
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
typedef long long ll;
typedef long double ld;
#define INF 2001001001
#define MOD 1000000007
int N,S[200001];
int M,X[600001],Y[600001];
int arr[200001];
bool vis[200001];
int to[200001];
deque<pair<int,int>>q;
int pos[200001];
void dfs(int node){
vis[node]=true;
if (!vis[arr[node]]){
q.push_back({node,arr[node]});
dfs(arr[node]);
//cout<<"Q: "<<arr[node]<<' '<<arr[to[node]]<<endl;
}
}
bool check(int mid){
q.clear();
for (int i=0;i<N;i++){
arr[i]=S[i];
vis[i]=false;
}
for (int i=1;i<=mid;i++)
swap(arr[X[i]],arr[Y[i]]);
int comps=0;
for (int i=0;i<N;i++){
pos[arr[i]]=i;
if (!vis[arr[i]]){
comps++;
q.push_back({i,arr[i]});
dfs(arr[i]);
q.pop_back();
}
}
return N-comps<=mid;
}
int findSwapPairs(int n,int s[],int m, int x[], int y[], int P[], int Q[]){
N=n;
for (int i=0;i<N;i++)
S[i]=s[i];
M=m;
for (int i=1;i<=M;i++){
X[i]=x[i-1];
Y[i]=y[i-1];
}
int low=-1,high=M+1;
while (low+1<high){
int mid=(low+high)/2;
if (check(mid))
high=mid;
else
low=mid;
}
check(high);
for (int i=high;i>=1;i--){
if (!q.empty()){
P[i-1]=pos[q[0].first];
Q[i-1]=pos[q[0].second];
swap(pos[arr[X[i]]],pos[arr[Y[i]]]);
swap(arr[X[i]],arr[Y[i]]);
q.pop_front();
}
}
for (int i=1;i<=high;i++){
swap(S[X[i]],S[Y[i]]);
swap(S[P[i-1]],S[Q[i-1]]);
}
for (int i=0;i<N;i++)
if (S[i]!=i)
assert(0);
return high;
}
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
5 ms |
384 KB |
Output is correct |
2 |
Correct |
4 ms |
384 KB |
Output is correct |
3 |
Correct |
5 ms |
384 KB |
Output is correct |
4 |
Correct |
5 ms |
384 KB |
Output is correct |
5 |
Correct |
5 ms |
384 KB |
Output is correct |
6 |
Correct |
5 ms |
384 KB |
Output is correct |
7 |
Correct |
4 ms |
384 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
5 ms |
384 KB |
Output is correct |
2 |
Correct |
4 ms |
384 KB |
Output is correct |
3 |
Correct |
5 ms |
384 KB |
Output is correct |
4 |
Correct |
5 ms |
384 KB |
Output is correct |
5 |
Correct |
5 ms |
384 KB |
Output is correct |
6 |
Correct |
5 ms |
384 KB |
Output is correct |
7 |
Correct |
4 ms |
384 KB |
Output is correct |
8 |
Correct |
4 ms |
384 KB |
Output is correct |
9 |
Correct |
4 ms |
384 KB |
Output is correct |
10 |
Correct |
5 ms |
384 KB |
Output is correct |
11 |
Correct |
5 ms |
384 KB |
Output is correct |
12 |
Correct |
5 ms |
384 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
5 ms |
384 KB |
Output is correct |
2 |
Correct |
4 ms |
384 KB |
Output is correct |
3 |
Correct |
5 ms |
384 KB |
Output is correct |
4 |
Correct |
5 ms |
384 KB |
Output is correct |
5 |
Correct |
5 ms |
384 KB |
Output is correct |
6 |
Correct |
5 ms |
384 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
5 ms |
384 KB |
Output is correct |
2 |
Correct |
4 ms |
384 KB |
Output is correct |
3 |
Correct |
5 ms |
384 KB |
Output is correct |
4 |
Correct |
5 ms |
384 KB |
Output is correct |
5 |
Correct |
5 ms |
384 KB |
Output is correct |
6 |
Correct |
5 ms |
384 KB |
Output is correct |
7 |
Correct |
4 ms |
384 KB |
Output is correct |
8 |
Correct |
4 ms |
384 KB |
Output is correct |
9 |
Correct |
4 ms |
384 KB |
Output is correct |
10 |
Correct |
5 ms |
384 KB |
Output is correct |
11 |
Correct |
5 ms |
384 KB |
Output is correct |
12 |
Correct |
5 ms |
384 KB |
Output is correct |
13 |
Correct |
5 ms |
384 KB |
Output is correct |
14 |
Correct |
4 ms |
384 KB |
Output is correct |
15 |
Correct |
5 ms |
384 KB |
Output is correct |
16 |
Correct |
5 ms |
384 KB |
Output is correct |
17 |
Correct |
5 ms |
384 KB |
Output is correct |
18 |
Correct |
5 ms |
384 KB |
Output is correct |
19 |
Correct |
4 ms |
384 KB |
Output is correct |
20 |
Correct |
4 ms |
384 KB |
Output is correct |
21 |
Correct |
6 ms |
616 KB |
Output is correct |
22 |
Correct |
6 ms |
768 KB |
Output is correct |
23 |
Correct |
6 ms |
768 KB |
Output is correct |
24 |
Correct |
6 ms |
640 KB |
Output is correct |
25 |
Correct |
5 ms |
768 KB |
Output is correct |
26 |
Correct |
5 ms |
768 KB |
Output is correct |
27 |
Correct |
5 ms |
768 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
6 ms |
512 KB |
Output is correct |
2 |
Correct |
6 ms |
768 KB |
Output is correct |
3 |
Correct |
6 ms |
640 KB |
Output is correct |
4 |
Correct |
5 ms |
640 KB |
Output is correct |
5 |
Correct |
6 ms |
640 KB |
Output is correct |
6 |
Correct |
6 ms |
640 KB |
Output is correct |
7 |
Correct |
6 ms |
660 KB |
Output is correct |
8 |
Correct |
7 ms |
640 KB |
Output is correct |
9 |
Correct |
7 ms |
640 KB |
Output is correct |
10 |
Correct |
6 ms |
640 KB |
Output is correct |
11 |
Correct |
6 ms |
768 KB |
Output is correct |
12 |
Correct |
6 ms |
640 KB |
Output is correct |
13 |
Correct |
6 ms |
640 KB |
Output is correct |
14 |
Correct |
6 ms |
512 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
6 ms |
512 KB |
Output is correct |
2 |
Correct |
6 ms |
768 KB |
Output is correct |
3 |
Correct |
6 ms |
640 KB |
Output is correct |
4 |
Correct |
5 ms |
640 KB |
Output is correct |
5 |
Correct |
6 ms |
640 KB |
Output is correct |
6 |
Correct |
6 ms |
640 KB |
Output is correct |
7 |
Correct |
6 ms |
660 KB |
Output is correct |
8 |
Correct |
7 ms |
640 KB |
Output is correct |
9 |
Correct |
7 ms |
640 KB |
Output is correct |
10 |
Correct |
6 ms |
640 KB |
Output is correct |
11 |
Correct |
6 ms |
768 KB |
Output is correct |
12 |
Correct |
6 ms |
640 KB |
Output is correct |
13 |
Correct |
6 ms |
640 KB |
Output is correct |
14 |
Correct |
6 ms |
512 KB |
Output is correct |
15 |
Correct |
192 ms |
29200 KB |
Output is correct |
16 |
Correct |
206 ms |
30056 KB |
Output is correct |
17 |
Correct |
238 ms |
32072 KB |
Output is correct |
18 |
Correct |
123 ms |
24824 KB |
Output is correct |
19 |
Correct |
189 ms |
28104 KB |
Output is correct |
20 |
Correct |
207 ms |
27528 KB |
Output is correct |
21 |
Correct |
201 ms |
29196 KB |
Output is correct |
22 |
Correct |
190 ms |
24032 KB |
Output is correct |
23 |
Correct |
222 ms |
33432 KB |
Output is correct |
24 |
Correct |
228 ms |
32816 KB |
Output is correct |
25 |
Correct |
229 ms |
32172 KB |
Output is correct |
26 |
Correct |
200 ms |
25208 KB |
Output is correct |
27 |
Correct |
182 ms |
23992 KB |
Output is correct |
28 |
Correct |
238 ms |
31832 KB |
Output is correct |
29 |
Correct |
214 ms |
25976 KB |
Output is correct |
30 |
Correct |
158 ms |
23124 KB |
Output is correct |
31 |
Correct |
216 ms |
26536 KB |
Output is correct |
32 |
Correct |
218 ms |
32192 KB |
Output is correct |
33 |
Correct |
224 ms |
32612 KB |
Output is correct |
34 |
Correct |
209 ms |
27384 KB |
Output is correct |
35 |
Correct |
187 ms |
27128 KB |
Output is correct |
36 |
Correct |
108 ms |
21624 KB |
Output is correct |
37 |
Correct |
242 ms |
34048 KB |
Output is correct |
38 |
Correct |
229 ms |
32660 KB |
Output is correct |
39 |
Correct |
234 ms |
32724 KB |
Output is correct |