#include <bits/stdc++.h>
using namespace std;
int N, A[1000001][2], L[1000001][2], R[1000001][2];
int main() {
ios_base::sync_with_stdio(0), cin.tie(0);
cin >> N;
for (int i = 1; i <= N * 2; ++i) cin >> A[i][0];
for (int i = 1; i <= N * 2; ++i) cin >> A[i][1];
for (int i = 1; i <= N * 2; ++i) {
L[i][0] = L[i][1] = 1e9;
R[i][0] = R[i][1] = -1e9;
for (int j = 0; j < 2; ++j) {
for (int k = 0; k < 2; ++k) {
if (A[i - 1][j] <= A[i][k]) {
L[i][k] = min(L[i][k], L[i - 1][j] + (k == 0));
R[i][k] = max(R[i][k], R[i - 1][j] + (k == 0));
}
}
}
}
string ans;
int a = 0, pre = 1e9;
for (int i = N * 2; i >= 1; --i) {
if (pre >= A[i][0] && L[i][0] <= N - a && N - a <= R[i][0]) {
pre = A[i][0];
ans += 'A';
++a;
continue;
}
if (pre >= A[i][1] && L[i][1] <= N - a && N - a <= R[i][1]) {
pre = A[i][1];
ans += 'B';
continue;
}
return !printf("-1");
}
reverse(ans.begin(), ans.end());
cout << ans;
return 0;
}
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
4 ms |
384 KB |
Output is correct |
| 2 |
Correct |
4 ms |
256 KB |
Output is correct |
| 3 |
Correct |
4 ms |
384 KB |
Output is correct |
| 4 |
Correct |
5 ms |
384 KB |
Output is correct |
| 5 |
Correct |
6 ms |
512 KB |
Output is correct |
| 6 |
Correct |
6 ms |
512 KB |
Output is correct |
| 7 |
Correct |
5 ms |
512 KB |
Output is correct |
| 8 |
Correct |
6 ms |
512 KB |
Output is correct |
| 9 |
Correct |
6 ms |
512 KB |
Output is correct |
| 10 |
Correct |
6 ms |
512 KB |
Output is correct |
| 11 |
Correct |
6 ms |
512 KB |
Output is correct |
| 12 |
Correct |
6 ms |
512 KB |
Output is correct |
| 13 |
Correct |
6 ms |
512 KB |
Output is correct |
| 14 |
Correct |
6 ms |
512 KB |
Output is correct |
| 15 |
Correct |
6 ms |
512 KB |
Output is correct |
| 16 |
Correct |
6 ms |
512 KB |
Output is correct |
| 17 |
Correct |
6 ms |
512 KB |
Output is correct |
| 18 |
Correct |
6 ms |
512 KB |
Output is correct |
| 19 |
Correct |
6 ms |
512 KB |
Output is correct |
| 20 |
Correct |
5 ms |
512 KB |
Output is correct |
| 21 |
Correct |
6 ms |
512 KB |
Output is correct |
| 22 |
Correct |
5 ms |
512 KB |
Output is correct |
| 23 |
Correct |
5 ms |
512 KB |
Output is correct |
| 24 |
Correct |
6 ms |
512 KB |
Output is correct |
| 25 |
Correct |
5 ms |
512 KB |
Output is correct |
| 26 |
Correct |
5 ms |
512 KB |
Output is correct |
| 27 |
Correct |
5 ms |
512 KB |
Output is correct |
| 28 |
Correct |
5 ms |
512 KB |
Output is correct |
| 29 |
Correct |
5 ms |
512 KB |
Output is correct |
| 30 |
Correct |
5 ms |
512 KB |
Output is correct |
| 31 |
Correct |
7 ms |
512 KB |
Output is correct |
| 32 |
Correct |
6 ms |
512 KB |
Output is correct |
| 33 |
Correct |
5 ms |
512 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
4 ms |
384 KB |
Output is correct |
| 2 |
Correct |
4 ms |
256 KB |
Output is correct |
| 3 |
Correct |
4 ms |
384 KB |
Output is correct |
| 4 |
Correct |
5 ms |
384 KB |
Output is correct |
| 5 |
Correct |
6 ms |
512 KB |
Output is correct |
| 6 |
Correct |
6 ms |
512 KB |
Output is correct |
| 7 |
Correct |
5 ms |
512 KB |
Output is correct |
| 8 |
Correct |
6 ms |
512 KB |
Output is correct |
| 9 |
Correct |
6 ms |
512 KB |
Output is correct |
| 10 |
Correct |
6 ms |
512 KB |
Output is correct |
| 11 |
Correct |
6 ms |
512 KB |
Output is correct |
| 12 |
Correct |
6 ms |
512 KB |
Output is correct |
| 13 |
Correct |
6 ms |
512 KB |
Output is correct |
| 14 |
Correct |
6 ms |
512 KB |
Output is correct |
| 15 |
Correct |
6 ms |
512 KB |
Output is correct |
| 16 |
Correct |
6 ms |
512 KB |
Output is correct |
| 17 |
Correct |
6 ms |
512 KB |
Output is correct |
| 18 |
Correct |
6 ms |
512 KB |
Output is correct |
| 19 |
Correct |
6 ms |
512 KB |
Output is correct |
| 20 |
Correct |
5 ms |
512 KB |
Output is correct |
| 21 |
Correct |
6 ms |
512 KB |
Output is correct |
| 22 |
Correct |
5 ms |
512 KB |
Output is correct |
| 23 |
Correct |
5 ms |
512 KB |
Output is correct |
| 24 |
Correct |
6 ms |
512 KB |
Output is correct |
| 25 |
Correct |
5 ms |
512 KB |
Output is correct |
| 26 |
Correct |
5 ms |
512 KB |
Output is correct |
| 27 |
Correct |
5 ms |
512 KB |
Output is correct |
| 28 |
Correct |
5 ms |
512 KB |
Output is correct |
| 29 |
Correct |
5 ms |
512 KB |
Output is correct |
| 30 |
Correct |
5 ms |
512 KB |
Output is correct |
| 31 |
Correct |
7 ms |
512 KB |
Output is correct |
| 32 |
Correct |
6 ms |
512 KB |
Output is correct |
| 33 |
Correct |
5 ms |
512 KB |
Output is correct |
| 34 |
Correct |
288 ms |
24432 KB |
Output is correct |
| 35 |
Correct |
280 ms |
25136 KB |
Output is correct |
| 36 |
Correct |
293 ms |
24752 KB |
Output is correct |
| 37 |
Correct |
309 ms |
25136 KB |
Output is correct |
| 38 |
Correct |
287 ms |
25264 KB |
Output is correct |
| 39 |
Correct |
271 ms |
31156 KB |
Output is correct |
| 40 |
Correct |
297 ms |
26732 KB |
Output is correct |
| 41 |
Correct |
280 ms |
25648 KB |
Output is correct |
| 42 |
Correct |
285 ms |
26160 KB |
Output is correct |
| 43 |
Correct |
307 ms |
26988 KB |
Output is correct |
| 44 |
Correct |
313 ms |
27116 KB |
Output is correct |
| 45 |
Correct |
320 ms |
27120 KB |
Output is correct |
| 46 |
Correct |
302 ms |
26988 KB |
Output is correct |
| 47 |
Correct |
295 ms |
26988 KB |
Output is correct |
| 48 |
Correct |
304 ms |
26988 KB |
Output is correct |
| 49 |
Correct |
297 ms |
26988 KB |
Output is correct |
| 50 |
Correct |
304 ms |
26988 KB |
Output is correct |
| 51 |
Correct |
313 ms |
26860 KB |
Output is correct |
| 52 |
Correct |
184 ms |
33516 KB |
Output is correct |
| 53 |
Correct |
235 ms |
33644 KB |
Output is correct |
| 54 |
Correct |
173 ms |
33516 KB |
Output is correct |
| 55 |
Correct |
175 ms |
33260 KB |
Output is correct |
| 56 |
Correct |
310 ms |
26988 KB |
Output is correct |
| 57 |
Correct |
270 ms |
40456 KB |
Output is correct |
| 58 |
Correct |
285 ms |
40428 KB |
Output is correct |
| 59 |
Correct |
264 ms |
40556 KB |
Output is correct |
| 60 |
Correct |
281 ms |
38448 KB |
Output is correct |
| 61 |
Correct |
272 ms |
40976 KB |
Output is correct |
| 62 |
Correct |
284 ms |
40576 KB |
Output is correct |
| 63 |
Correct |
282 ms |
41068 KB |
Output is correct |
| 64 |
Correct |
255 ms |
39600 KB |
Output is correct |
| 65 |
Correct |
270 ms |
40940 KB |
Output is correct |
