| # |
Submission time |
Handle |
Problem |
Language |
Result |
Execution time |
Memory |
| 211920 |
2020-03-21T18:02:16 Z |
WLZ |
Building 4 (JOI20_building4) |
C++14 |
|
469 ms |
121776 KB |
#include <iostream>
#include <vector>
#include <algorithm>
#include <string>
using namespace std;
const int INF = 0x3f3f3f3f;
int main() {
ios::sync_with_stdio(false);
cin.tie(0);
int n;
cin >> n;
vector< vector<int> > a(2, vector<int>(2 * n + 1));
for (int i = 0; i < 2; i++) {
for (int j = 1; j <= 2 * n; j++) {
cin >> a[i][j];
}
}
vector< vector<int> > dp_r(2 * n + 1, vector<int>(2, -1));
vector< vector<int> > dp_l(2 * n + 1, vector<int>(2, INF));
dp_r[0][0] = dp_r[0][1] = dp_l[0][0] = dp_l[0][1] = 0;
for (int i = 0; i < 2 * n; i++) {
for (int j = 0; j < 2; j++) {
if (dp_r[i][j] == -1) {
continue;
}
if (a[j][i] <= a[0][i + 1]) {
dp_r[i + 1][0] = max(dp_r[i + 1][0], dp_r[i][j] + 1);
dp_l[i + 1][0] = min(dp_l[i + 1][0], dp_l[i][j] + 1);
}
if (a[j][i] <= a[1][i + 1]) {
dp_r[i + 1][1] = max(dp_r[i + 1][1], dp_r[i][j]);
dp_l[i + 1][1] = min(dp_l[i + 1][1], dp_l[i][j]);
}
}
}
int cur;
if (dp_r[2 * n][0] >= n && dp_l[2 * n][0] <= n) {
cur = 0;
} else if (dp_r[2 * n][1] >= n && dp_l[2 * n][1] <= n) {
cur = 1;
} else {
cout << -1 << '\n';
return 0;
}
string ans = "";
for (int i = 2 * n, cnt = n; i >= 1; i--) {
if (cur == 0) {
ans += 'A';
cnt--;
} else {
ans += 'B';
}
if (a[0][i - 1] <= a[cur][i] && dp_r[i - 1][0] >= cnt && dp_l[i - 1][0] <= cnt) {
cur = 0;
} else {
cur = 1;
}
}
reverse(ans.begin(), ans.end());
cout << ans << '\n';
return 0;
}
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
4 ms |
384 KB |
Output is correct |
| 2 |
Correct |
5 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 |
6 ms |
768 KB |
Output is correct |
| 6 |
Correct |
6 ms |
768 KB |
Output is correct |
| 7 |
Correct |
6 ms |
768 KB |
Output is correct |
| 8 |
Correct |
6 ms |
768 KB |
Output is correct |
| 9 |
Correct |
6 ms |
768 KB |
Output is correct |
| 10 |
Correct |
6 ms |
768 KB |
Output is correct |
| 11 |
Correct |
6 ms |
768 KB |
Output is correct |
| 12 |
Correct |
6 ms |
768 KB |
Output is correct |
| 13 |
Correct |
6 ms |
768 KB |
Output is correct |
| 14 |
Correct |
6 ms |
896 KB |
Output is correct |
| 15 |
Correct |
6 ms |
768 KB |
Output is correct |
| 16 |
Correct |
6 ms |
768 KB |
Output is correct |
| 17 |
Correct |
6 ms |
768 KB |
Output is correct |
| 18 |
Correct |
6 ms |
768 KB |
Output is correct |
| 19 |
Correct |
6 ms |
896 KB |
Output is correct |
| 20 |
Correct |
6 ms |
768 KB |
Output is correct |
| 21 |
Correct |
6 ms |
768 KB |
Output is correct |
| 22 |
Correct |
6 ms |
896 KB |
Output is correct |
| 23 |
Correct |
6 ms |
896 KB |
Output is correct |
| 24 |
Correct |
6 ms |
768 KB |
Output is correct |
| 25 |
Correct |
6 ms |
896 KB |
Output is correct |
| 26 |
Correct |
6 ms |
768 KB |
Output is correct |
| 27 |
Correct |
6 ms |
768 KB |
Output is correct |
| 28 |
Correct |
6 ms |
768 KB |
Output is correct |
| 29 |
Correct |
6 ms |
896 KB |
Output is correct |
| 30 |
Correct |
6 ms |
768 KB |
Output is correct |
| 31 |
Correct |
6 ms |
768 KB |
Output is correct |
| 32 |
Correct |
7 ms |
768 KB |
Output is correct |
| 33 |
Correct |
6 ms |
896 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
4 ms |
384 KB |
Output is correct |
| 2 |
Correct |
5 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 |
6 ms |
768 KB |
Output is correct |
| 6 |
Correct |
6 ms |
768 KB |
Output is correct |
| 7 |
Correct |
6 ms |
768 KB |
Output is correct |
| 8 |
Correct |
6 ms |
768 KB |
Output is correct |
| 9 |
Correct |
6 ms |
768 KB |
Output is correct |
| 10 |
Correct |
6 ms |
768 KB |
Output is correct |
| 11 |
Correct |
6 ms |
768 KB |
Output is correct |
| 12 |
Correct |
6 ms |
768 KB |
Output is correct |
| 13 |
Correct |
6 ms |
768 KB |
Output is correct |
| 14 |
Correct |
6 ms |
896 KB |
Output is correct |
| 15 |
Correct |
6 ms |
768 KB |
Output is correct |
| 16 |
Correct |
6 ms |
768 KB |
Output is correct |
| 17 |
Correct |
6 ms |
768 KB |
Output is correct |
| 18 |
Correct |
6 ms |
768 KB |
Output is correct |
| 19 |
Correct |
6 ms |
896 KB |
Output is correct |
| 20 |
Correct |
6 ms |
768 KB |
Output is correct |
| 21 |
Correct |
6 ms |
768 KB |
Output is correct |
| 22 |
Correct |
6 ms |
896 KB |
Output is correct |
| 23 |
Correct |
6 ms |
896 KB |
Output is correct |
| 24 |
Correct |
6 ms |
768 KB |
Output is correct |
| 25 |
Correct |
6 ms |
896 KB |
Output is correct |
| 26 |
Correct |
6 ms |
768 KB |
Output is correct |
| 27 |
Correct |
6 ms |
768 KB |
Output is correct |
| 28 |
Correct |
6 ms |
768 KB |
Output is correct |
| 29 |
Correct |
6 ms |
896 KB |
Output is correct |
| 30 |
Correct |
6 ms |
768 KB |
Output is correct |
| 31 |
Correct |
6 ms |
768 KB |
Output is correct |
| 32 |
Correct |
7 ms |
768 KB |
Output is correct |
| 33 |
Correct |
6 ms |
896 KB |
Output is correct |
| 34 |
Correct |
412 ms |
115880 KB |
Output is correct |
| 35 |
Correct |
409 ms |
112200 KB |
Output is correct |
| 36 |
Correct |
413 ms |
110344 KB |
Output is correct |
| 37 |
Correct |
412 ms |
112572 KB |
Output is correct |
| 38 |
Correct |
421 ms |
112572 KB |
Output is correct |
| 39 |
Correct |
415 ms |
113196 KB |
Output is correct |
| 40 |
Correct |
448 ms |
121024 KB |
Output is correct |
| 41 |
Correct |
402 ms |
114868 KB |
Output is correct |
| 42 |
Correct |
428 ms |
117160 KB |
Output is correct |
| 43 |
Correct |
451 ms |
121644 KB |
Output is correct |
| 44 |
Correct |
469 ms |
121644 KB |
Output is correct |
| 45 |
Correct |
447 ms |
121644 KB |
Output is correct |
| 46 |
Correct |
452 ms |
121644 KB |
Output is correct |
| 47 |
Correct |
420 ms |
121696 KB |
Output is correct |
| 48 |
Correct |
426 ms |
121772 KB |
Output is correct |
| 49 |
Correct |
429 ms |
121776 KB |
Output is correct |
| 50 |
Correct |
453 ms |
121716 KB |
Output is correct |
| 51 |
Correct |
442 ms |
121644 KB |
Output is correct |
| 52 |
Correct |
302 ms |
121644 KB |
Output is correct |
| 53 |
Correct |
318 ms |
121760 KB |
Output is correct |
| 54 |
Correct |
289 ms |
121644 KB |
Output is correct |
| 55 |
Correct |
308 ms |
121772 KB |
Output is correct |
| 56 |
Correct |
435 ms |
121744 KB |
Output is correct |
| 57 |
Correct |
399 ms |
121152 KB |
Output is correct |
| 58 |
Correct |
401 ms |
121644 KB |
Output is correct |
| 59 |
Correct |
396 ms |
121772 KB |
Output is correct |
| 60 |
Correct |
389 ms |
113608 KB |
Output is correct |
| 61 |
Correct |
387 ms |
121668 KB |
Output is correct |
| 62 |
Correct |
399 ms |
119908 KB |
Output is correct |
| 63 |
Correct |
396 ms |
121644 KB |
Output is correct |
| 64 |
Correct |
378 ms |
116788 KB |
Output is correct |
| 65 |
Correct |
387 ms |
121772 KB |
Output is correct |
