//thuanqvbn03
#include <bits/stdc++.h>
using namespace std;
const int MaxN = 1000005;
int n;
int a[MaxN][2];
bool Color[MaxN][2];
pair<int, int> dp[MaxN][2];
void DFS(int i, int j)
{
if (Color[i][j])
{
return;
}
Color[i][j] = true;
int Min = 1e9, Max = -1e9;
if (a[i][j] <= a[i + 1][0])
{
DFS(i + 1, 0);
Min = min(Min, dp[i + 1][0].first + 1);
Max = max(Max, dp[i + 1][0].second + 1);
}
if (a[i][j] <= a[i + 1][1])
{
DFS(i + 1, 1);
Min = min(Min, dp[i + 1][1].first);
Max = max(Max, dp[i + 1][1].second);
}
dp[i][j] = make_pair(Min, Max);
}
int main()
{
ios_base::sync_with_stdio(false);
cin.tie(0);
cout.tie(0);
cin >> n;
n *= 2;
for (int j = 0; j < 2; j++)
{
for (int i = 1; i <= n; i++)
{
cin >> a[i][j];
}
}
Color[n][0] = Color[n][1] = 1;
DFS(0, 0);
if (dp[0][0].first > n / 2 || dp[0][0].first > dp[0][0].second)
{
cout << -1;
return 0;
}
int pre = 0, cnt = n / 2;
for (int i = 1; i <= n; i++)
{
if (a[i][0] >= a[i - 1][pre] && cnt - 1 >= dp[i][0].first && cnt - 1 <= dp[i][0].second)
{
cnt--;
cout << 'A';
pre = 0;
}
else
{
cout << 'B';
pre = 1;
}
}
return 0;
}
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
0 ms |
384 KB |
Output is correct |
2 |
Correct |
0 ms |
384 KB |
Output is correct |
3 |
Correct |
0 ms |
384 KB |
Output is correct |
4 |
Correct |
0 ms |
384 KB |
Output is correct |
5 |
Correct |
1 ms |
384 KB |
Output is correct |
6 |
Correct |
2 ms |
768 KB |
Output is correct |
7 |
Correct |
1 ms |
640 KB |
Output is correct |
8 |
Correct |
2 ms |
640 KB |
Output is correct |
9 |
Correct |
2 ms |
768 KB |
Output is correct |
10 |
Correct |
1 ms |
640 KB |
Output is correct |
11 |
Correct |
2 ms |
768 KB |
Output is correct |
12 |
Correct |
2 ms |
768 KB |
Output is correct |
13 |
Correct |
2 ms |
768 KB |
Output is correct |
14 |
Correct |
2 ms |
768 KB |
Output is correct |
15 |
Correct |
2 ms |
768 KB |
Output is correct |
16 |
Correct |
2 ms |
768 KB |
Output is correct |
17 |
Correct |
2 ms |
768 KB |
Output is correct |
18 |
Correct |
2 ms |
768 KB |
Output is correct |
19 |
Correct |
2 ms |
768 KB |
Output is correct |
20 |
Correct |
2 ms |
768 KB |
Output is correct |
21 |
Correct |
2 ms |
768 KB |
Output is correct |
22 |
Correct |
1 ms |
768 KB |
Output is correct |
23 |
Correct |
1 ms |
768 KB |
Output is correct |
24 |
Correct |
2 ms |
768 KB |
Output is correct |
25 |
Correct |
1 ms |
768 KB |
Output is correct |
26 |
Correct |
2 ms |
768 KB |
Output is correct |
27 |
Correct |
2 ms |
768 KB |
Output is correct |
28 |
Correct |
1 ms |
768 KB |
Output is correct |
29 |
Correct |
2 ms |
768 KB |
Output is correct |
30 |
Correct |
2 ms |
768 KB |
Output is correct |
31 |
Correct |
2 ms |
768 KB |
Output is correct |
32 |
Correct |
2 ms |
640 KB |
Output is correct |
33 |
Correct |
2 ms |
768 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
0 ms |
384 KB |
Output is correct |
2 |
Correct |
0 ms |
384 KB |
Output is correct |
3 |
Correct |
0 ms |
384 KB |
Output is correct |
4 |
Correct |
0 ms |
384 KB |
Output is correct |
5 |
Correct |
1 ms |
384 KB |
Output is correct |
6 |
Correct |
2 ms |
768 KB |
Output is correct |
7 |
Correct |
1 ms |
640 KB |
Output is correct |
8 |
Correct |
2 ms |
640 KB |
Output is correct |
9 |
Correct |
2 ms |
768 KB |
Output is correct |
10 |
Correct |
1 ms |
640 KB |
Output is correct |
11 |
Correct |
2 ms |
768 KB |
Output is correct |
12 |
Correct |
2 ms |
768 KB |
Output is correct |
13 |
Correct |
2 ms |
768 KB |
Output is correct |
14 |
Correct |
2 ms |
768 KB |
Output is correct |
15 |
Correct |
2 ms |
768 KB |
Output is correct |
16 |
Correct |
2 ms |
768 KB |
Output is correct |
17 |
Correct |
2 ms |
768 KB |
Output is correct |
18 |
Correct |
2 ms |
768 KB |
Output is correct |
19 |
Correct |
2 ms |
768 KB |
Output is correct |
20 |
Correct |
2 ms |
768 KB |
Output is correct |
21 |
Correct |
2 ms |
768 KB |
Output is correct |
22 |
Correct |
1 ms |
768 KB |
Output is correct |
23 |
Correct |
1 ms |
768 KB |
Output is correct |
24 |
Correct |
2 ms |
768 KB |
Output is correct |
25 |
Correct |
1 ms |
768 KB |
Output is correct |
26 |
Correct |
2 ms |
768 KB |
Output is correct |
27 |
Correct |
2 ms |
768 KB |
Output is correct |
28 |
Correct |
1 ms |
768 KB |
Output is correct |
29 |
Correct |
2 ms |
768 KB |
Output is correct |
30 |
Correct |
2 ms |
768 KB |
Output is correct |
31 |
Correct |
2 ms |
768 KB |
Output is correct |
32 |
Correct |
2 ms |
640 KB |
Output is correct |
33 |
Correct |
2 ms |
768 KB |
Output is correct |
34 |
Correct |
223 ms |
8204 KB |
Output is correct |
35 |
Correct |
315 ms |
97400 KB |
Output is correct |
36 |
Correct |
319 ms |
95992 KB |
Output is correct |
37 |
Correct |
319 ms |
97912 KB |
Output is correct |
38 |
Correct |
321 ms |
97912 KB |
Output is correct |
39 |
Correct |
309 ms |
98296 KB |
Output is correct |
40 |
Correct |
340 ms |
104652 KB |
Output is correct |
41 |
Correct |
349 ms |
100088 KB |
Output is correct |
42 |
Correct |
331 ms |
101880 KB |
Output is correct |
43 |
Correct |
344 ms |
105208 KB |
Output is correct |
44 |
Correct |
348 ms |
105212 KB |
Output is correct |
45 |
Correct |
356 ms |
105208 KB |
Output is correct |
46 |
Correct |
340 ms |
105212 KB |
Output is correct |
47 |
Correct |
336 ms |
105208 KB |
Output is correct |
48 |
Correct |
336 ms |
105336 KB |
Output is correct |
49 |
Correct |
343 ms |
105212 KB |
Output is correct |
50 |
Correct |
358 ms |
105092 KB |
Output is correct |
51 |
Correct |
342 ms |
105208 KB |
Output is correct |
52 |
Correct |
269 ms |
105080 KB |
Output is correct |
53 |
Correct |
273 ms |
105108 KB |
Output is correct |
54 |
Correct |
269 ms |
105100 KB |
Output is correct |
55 |
Correct |
265 ms |
105240 KB |
Output is correct |
56 |
Correct |
367 ms |
105208 KB |
Output is correct |
57 |
Correct |
322 ms |
104564 KB |
Output is correct |
58 |
Correct |
313 ms |
105208 KB |
Output is correct |
59 |
Correct |
303 ms |
105080 KB |
Output is correct |
60 |
Correct |
294 ms |
98808 KB |
Output is correct |
61 |
Correct |
315 ms |
105116 KB |
Output is correct |
62 |
Correct |
310 ms |
103672 KB |
Output is correct |
63 |
Correct |
320 ms |
105080 KB |
Output is correct |
64 |
Correct |
300 ms |
101496 KB |
Output is correct |
65 |
Correct |
311 ms |
105108 KB |
Output is correct |