#include <iostream>
#include <algorithm>
#include <vector>
using namespace std;
const int DIM = 1000005;
pair<int, int> seg[2][DIM];
char ans[DIM];
int arr[2][DIM];
void solve(int k, int n, int rem) {
if (n == 0)
cout << (ans + 1);
else {
if (k == 0)
ans[n] = 'A';
else
ans[n] = 'B';
if (arr[0][n - 1] <= arr[k][n] and seg[0][n - 1].first != -1 and
seg[0][n - 1].first <= rem - (1 - k) and rem - (1 - k) <= seg[0][n - 1].second)
solve(0, n - 1, rem - (1 - k));
else
solve(1, n - 1, rem - (1 - k));
}
}
void update(pair<int, int> &s1, pair<int, int> &s2) {
if (s2.first == -1)
return;
if (s1.first == -1)
s1 = s2;
else
s1 = make_pair(min(s1.first, s2.first), max(s1.second, s2.second));
}
int main(void) {
// freopen("building4.in", "r", stdin);
// freopen("building4.out", "w", stdout);
int n;
cin >> n;
for (int k = 0; k <= 1; ++k) {
for (int i = 1; i <= n * 2; ++i) {
cin >> arr[k][i];
seg[k][i] = {-1, -1};
}
}
seg[0][0] = {0, 0};
for (int i = 1; i <= n * 2; ++i) {
for (int k1 = 0; k1 <= 1; ++k1)
for (int k2 = 0; k2 <= 1; ++k2)
if (arr[k1][i - 1] <= arr[k2][i])
update(seg[k2][i], seg[k1][i - 1]);
if (seg[0][i].first != -1)
++seg[0][i].first, ++seg[0][i].second;
}
/* for (int i = 0; i <= n * 2; ++i) {
for (int k = 0; k <= 1; ++k)
cout << seg[k][i].first << " " << seg[k][i].second << " ";
cout << endl;
} */
if (seg[0][n * 2].first != -1 and seg[0][n * 2].first <= n and seg[0][n * 2].second >= n)
solve(0, n * 2, n);
else if (seg[1][n * 2].first != -1 and seg[1][n * 2].first <= n and seg[1][n * 2].second >= n)
solve(1, n * 2, n);
else
cout << -1 << "\n";
return 0;
}
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
0 ms |
384 KB |
Output is correct |
| 2 |
Correct |
0 ms |
384 KB |
Output is correct |
| 3 |
Correct |
1 ms |
384 KB |
Output is correct |
| 4 |
Correct |
1 ms |
384 KB |
Output is correct |
| 5 |
Correct |
6 ms |
544 KB |
Output is correct |
| 6 |
Correct |
5 ms |
512 KB |
Output is correct |
| 7 |
Correct |
5 ms |
512 KB |
Output is correct |
| 8 |
Correct |
7 ms |
512 KB |
Output is correct |
| 9 |
Correct |
5 ms |
512 KB |
Output is correct |
| 10 |
Correct |
5 ms |
512 KB |
Output is correct |
| 11 |
Correct |
6 ms |
544 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 |
7 ms |
512 KB |
Output is correct |
| 16 |
Correct |
6 ms |
512 KB |
Output is correct |
| 17 |
Correct |
5 ms |
512 KB |
Output is correct |
| 18 |
Correct |
5 ms |
512 KB |
Output is correct |
| 19 |
Correct |
6 ms |
512 KB |
Output is correct |
| 20 |
Correct |
4 ms |
512 KB |
Output is correct |
| 21 |
Correct |
3 ms |
512 KB |
Output is correct |
| 22 |
Correct |
3 ms |
512 KB |
Output is correct |
| 23 |
Correct |
4 ms |
512 KB |
Output is correct |
| 24 |
Correct |
6 ms |
512 KB |
Output is correct |
| 25 |
Correct |
4 ms |
512 KB |
Output is correct |
| 26 |
Correct |
4 ms |
512 KB |
Output is correct |
| 27 |
Correct |
4 ms |
512 KB |
Output is correct |
| 28 |
Correct |
3 ms |
512 KB |
Output is correct |
| 29 |
Correct |
5 ms |
512 KB |
Output is correct |
| 30 |
Correct |
4 ms |
512 KB |
Output is correct |
| 31 |
Correct |
4 ms |
512 KB |
Output is correct |
| 32 |
Correct |
4 ms |
512 KB |
Output is correct |
| 33 |
Correct |
4 ms |
512 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
0 ms |
384 KB |
Output is correct |
| 2 |
Correct |
0 ms |
384 KB |
Output is correct |
| 3 |
Correct |
1 ms |
384 KB |
Output is correct |
| 4 |
Correct |
1 ms |
384 KB |
Output is correct |
| 5 |
Correct |
6 ms |
544 KB |
Output is correct |
| 6 |
Correct |
5 ms |
512 KB |
Output is correct |
| 7 |
Correct |
5 ms |
512 KB |
Output is correct |
| 8 |
Correct |
7 ms |
512 KB |
Output is correct |
| 9 |
Correct |
5 ms |
512 KB |
Output is correct |
| 10 |
Correct |
5 ms |
512 KB |
Output is correct |
| 11 |
Correct |
6 ms |
544 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 |
7 ms |
512 KB |
Output is correct |
| 16 |
Correct |
6 ms |
512 KB |
Output is correct |
| 17 |
Correct |
5 ms |
512 KB |
Output is correct |
| 18 |
Correct |
5 ms |
512 KB |
Output is correct |
| 19 |
Correct |
6 ms |
512 KB |
Output is correct |
| 20 |
Correct |
4 ms |
512 KB |
Output is correct |
| 21 |
Correct |
3 ms |
512 KB |
Output is correct |
| 22 |
Correct |
3 ms |
512 KB |
Output is correct |
| 23 |
Correct |
4 ms |
512 KB |
Output is correct |
| 24 |
Correct |
6 ms |
512 KB |
Output is correct |
| 25 |
Correct |
4 ms |
512 KB |
Output is correct |
| 26 |
Correct |
4 ms |
512 KB |
Output is correct |
| 27 |
Correct |
4 ms |
512 KB |
Output is correct |
| 28 |
Correct |
3 ms |
512 KB |
Output is correct |
| 29 |
Correct |
5 ms |
512 KB |
Output is correct |
| 30 |
Correct |
4 ms |
512 KB |
Output is correct |
| 31 |
Correct |
4 ms |
512 KB |
Output is correct |
| 32 |
Correct |
4 ms |
512 KB |
Output is correct |
| 33 |
Correct |
4 ms |
512 KB |
Output is correct |
| 34 |
Correct |
1257 ms |
42460 KB |
Output is correct |
| 35 |
Correct |
1189 ms |
41956 KB |
Output is correct |
| 36 |
Correct |
1181 ms |
41176 KB |
Output is correct |
| 37 |
Correct |
1192 ms |
42104 KB |
Output is correct |
| 38 |
Correct |
1177 ms |
42120 KB |
Output is correct |
| 39 |
Correct |
1121 ms |
41228 KB |
Output is correct |
| 40 |
Correct |
1229 ms |
44668 KB |
Output is correct |
| 41 |
Correct |
1170 ms |
42180 KB |
Output is correct |
| 42 |
Correct |
1210 ms |
43636 KB |
Output is correct |
| 43 |
Correct |
1261 ms |
45176 KB |
Output is correct |
| 44 |
Correct |
1260 ms |
45176 KB |
Output is correct |
| 45 |
Correct |
1274 ms |
45172 KB |
Output is correct |
| 46 |
Correct |
1276 ms |
45172 KB |
Output is correct |
| 47 |
Correct |
1224 ms |
44280 KB |
Output is correct |
| 48 |
Correct |
1201 ms |
44232 KB |
Output is correct |
| 49 |
Correct |
1231 ms |
44796 KB |
Output is correct |
| 50 |
Correct |
1249 ms |
44276 KB |
Output is correct |
| 51 |
Correct |
1249 ms |
44428 KB |
Output is correct |
| 52 |
Correct |
694 ms |
33432 KB |
Output is correct |
| 53 |
Correct |
686 ms |
33528 KB |
Output is correct |
| 54 |
Correct |
662 ms |
33400 KB |
Output is correct |
| 55 |
Correct |
661 ms |
33272 KB |
Output is correct |
| 56 |
Correct |
1267 ms |
45340 KB |
Output is correct |
| 57 |
Correct |
1020 ms |
40180 KB |
Output is correct |
| 58 |
Correct |
1026 ms |
40464 KB |
Output is correct |
| 59 |
Correct |
1032 ms |
40336 KB |
Output is correct |
| 60 |
Correct |
974 ms |
38504 KB |
Output is correct |
| 61 |
Correct |
1032 ms |
40808 KB |
Output is correct |
| 62 |
Correct |
1016 ms |
40440 KB |
Output is correct |
| 63 |
Correct |
1037 ms |
41040 KB |
Output is correct |
| 64 |
Correct |
996 ms |
39476 KB |
Output is correct |
| 65 |
Correct |
1079 ms |
41064 KB |
Output is correct |
