#include <bits/stdc++.h>
using namespace std;
typedef int64_t ll;
int findSwapPairs(int n, int _s[], int m, int x[], int y[], int p[], int q[]) {
int s[n], ok = 1;
for (int i = 0; i < n; i++) {
s[i] = _s[i];
}
for (int i = 1; i < n; i++) {
ok &= (s[i - 1] < s[i]);
}
if (ok) return 0;
for (int i = 0; i < m; i++) {
swap(s[x[i]], s[y[i]]);
}
int r = 0;
int vis[n]{}, val[n];
for (int i = 0; i < n; i++) val[i] = i;
for (int st = 0; st < n; st++) {
if (vis[st]) continue;
int i = st;
while (1) {
vis[i] = 1;
if (vis[s[i]]) break;
int a = val[i], b = val[s[i]];
p[r] = a, q[r] = b;
r++;
if (val[i] == i) {
val[i] = b;
}
if (val[s[i]] == s[i]) {
val[s[i]] = a;
}
i = s[i];
}
}
while (r < m) {
p[r] = 0, q[r] = 0;
r++;
}
for (int i = 0; i < r; i++) {
assert(0 <= q[i] && q[i] < n);
assert(0 <= p[i] && p[i] < n);
swap(s[q[i]], s[p[i]]);
}
for (int i = 1; i < n; i++) {
assert(s[i - 1] < s[i]);
}
return r;
}
// int main() {
// ios_base::sync_with_stdio(0), cin.tie(0);
// int N;
// cin >> N;
// int S[N];
// for (int i = 0; i < N; i++) {
// cin >> S[i];
// }
// int M;
// cin >> M;
// int X[M], Y[M];
// for (int i = 0; i < M; i++) {
// cin >> X[i] >> Y[i];
// }
// int P[M], Q[M];
// int R = findSwapPairs(N, S, M, X, Y, P, Q);
// cout << R << '\n';
// for (int i = 0; i < R; i++) {
// cout << P[i] << ' ' << Q[i] << '\n';
// }
// return 0;
// }
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
212 KB |
Output is correct |
2 |
Correct |
1 ms |
212 KB |
Output is correct |
3 |
Correct |
1 ms |
212 KB |
Output is correct |
4 |
Incorrect |
1 ms |
296 KB |
Output isn't correct |
5 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
212 KB |
Output is correct |
2 |
Correct |
1 ms |
212 KB |
Output is correct |
3 |
Correct |
1 ms |
212 KB |
Output is correct |
4 |
Incorrect |
1 ms |
296 KB |
Output isn't correct |
5 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
212 KB |
Output is correct |
2 |
Incorrect |
1 ms |
212 KB |
Output isn't correct |
3 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
212 KB |
Output is correct |
2 |
Correct |
1 ms |
212 KB |
Output is correct |
3 |
Correct |
1 ms |
212 KB |
Output is correct |
4 |
Incorrect |
1 ms |
296 KB |
Output isn't correct |
5 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Incorrect |
2 ms |
436 KB |
Output isn't correct |
2 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Incorrect |
2 ms |
436 KB |
Output isn't correct |
2 |
Halted |
0 ms |
0 KB |
- |