#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define vi vector<int>
#define all(x) x.begin(), x.end()
#define ca(v) for(auto i:v) cout<<i<<" ";
#define nl cout<<"\n"
const int MAXN = 5e5 + 5;
int findSwapPairs(int N, int* s, int M, int* X, int* Y, int* P, int* Q){
int l = 0;
int r = M-1;
int ans = M;
vi S;
for(int i=0; i<N; i++) S.push_back(s[i]);
while(l <= r){
int m = (l+r)/2;
vi ar = S;
ca(ar);
for(int i=0; i<=m; i++){
swap(ar[X[i]], ar[Y[i]]);
}
int cnt = 0;
vi vis(N, 0);
for(int i=0; i<N; i++) {
if(vis[i]) continue;
cnt++;
int q = i;
while(1){
vis[q] = 1;
if(vis[ar[q]]) break;
q = ar[q];
}
}
cnt = N - cnt;
if(cnt-1 <= m){
ans = m;
r = m-1;
}
else l = m+1;
}
vi vis(N, 0);
vector<int> ar;
for(int i=0; i<=ans; i++) swap(ar[X[i]], ar[Y[i]]);
vi xm, ym;
int cnt = 0;
for(int i=0; i<N; i++) {
if(vis[i]) continue;
cnt++;
int q = i;
while(1){
vis[q] = 1;
if(vis[ar[q]]) break;
xm.push_back(q);
ym.push_back(ar[q]);
q = ar[q];
}
}
vector<int> pos(N);
for(int i=0; i<N; i++) pos[S[i]] = i;
for(int i=0; i<=ans; i++){
swap(pos[S[X[i]]], pos[S[Y[i]]]);
swap(S[X[i]], S[Y[i]]);
P[i] = pos[S[xm[i]]];
Q[i] = pos[S[ym[i]]];
}
for(int i=1; i<=N - cnt; i++){
P[i+ans] = 0;
S[i+ans] = 0;
}
return ans+1;
}
// int main()
// {
// // ios_base::sync_with_stdio(0); cin.tie(0);
// if (fopen("input.in", "r")) freopen("input.in", "r", stdin);
// int N, M; cin>>N>>M;
// vi S(N), X(M), Y(M), P, Q;
// for(int i=0; i<N; i++) cin>>S[i];
// for(int i=0; i<M; i++) cin>>X[i]>>Y[i];
// cout<<findSwapPairs(N, S, M, X, Y, P, Q);
// }
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Runtime error |
1 ms |
328 KB |
Execution killed with signal 11 |
2 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Runtime error |
1 ms |
328 KB |
Execution killed with signal 11 |
2 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Runtime error |
1 ms |
336 KB |
Execution killed with signal 11 |
2 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Runtime error |
1 ms |
328 KB |
Execution killed with signal 11 |
2 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Runtime error |
3 ms |
720 KB |
Execution killed with signal 11 |
2 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Runtime error |
3 ms |
720 KB |
Execution killed with signal 11 |
2 |
Halted |
0 ms |
0 KB |
- |