#include <cstdio>
#include <cstring>
#include <algorithm>
using namespace std;
const int N = 1e6 + 500;
int L[N][2], R[N][2];
int A[N][2], ans[N], n;
void rekonstrukcija(int j){
int cur = n;
for(int i = 2 * n - 1;i >= 0;i--){
ans[i] = j;
cur -= j;
//printf("cur = %d, i = %d\n", cur, i);
if(A[i][j] >= A[i - 1][0] && L[i - 1][0] != -1 && L[i - 1][0] <= cur && R[i - 1][0] >= cur)
j = 0;
else
j = 1;
}
for(int i = 0;i < 2 * n;i++)
printf("%c", 'A' + ans[i]);
printf("\n");
}
int main(){
scanf("%d", &n);
for(int j = 0;j < 2;j++)
for(int i = 0;i < 2 * n;i++)
scanf("%d", &A[i][j]);
L[0][0] = 0, R[0][0] = 0;
L[0][1] = 1, R[0][1] = 1;
for(int i = 1;i < 2 * n;i++){
for(int j = 0;j < 2;j++){
L[i][j] = -1;
if(A[i][j] >= A[i - 1][0] && L[i - 1][0] != -1){
L[i][j] = L[i - 1][0];
R[i][j] = R[i - 1][0];
}
if(A[i][j] >= A[i - 1][1] && L[i - 1][1] != -1){
if(L[i][j] == -1){
L[i][j] = L[i - 1][1];
R[i][j] = R[i - 1][1];
}
else{
L[i][j] = min(L[i - 1][1], L[i][j]);
R[i][j] = max(R[i - 1][1], R[i][j]);
}
}
if(L[i][j] != -1)
L[i][j] += j, R[i][j] += j;
//printf("%d, %d => [%d %d]\n", i, j, L[i][j], R[i][j]);
}
}
if(L[2 * n - 1][0] != -1 && L[2 * n - 1][0] <= n && R[2 * n - 1][0] >= n)
rekonstrukcija(0);
else if(L[2 * n - 1][1] != -1 && L[2 * n - 1][1] <= n && R[2 * n - 1][1] >= n)
rekonstrukcija(1);
else
printf("-1\n");
return 0;
}
Compilation message
building4.cpp: In function 'int main()':
building4.cpp:29:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
scanf("%d", &n);
~~~~~^~~~~~~~~~
building4.cpp:32:9: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
scanf("%d", &A[i][j]);
~~~~~^~~~~~~~~~~~~~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
5 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 |
512 KB |
Output is correct |
| 6 |
Correct |
6 ms |
512 KB |
Output is correct |
| 7 |
Correct |
7 ms |
512 KB |
Output is correct |
| 8 |
Correct |
7 ms |
512 KB |
Output is correct |
| 9 |
Correct |
7 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 |
7 ms |
512 KB |
Output is correct |
| 14 |
Correct |
7 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 |
9 ms |
512 KB |
Output is correct |
| 18 |
Correct |
8 ms |
512 KB |
Output is correct |
| 19 |
Correct |
6 ms |
512 KB |
Output is correct |
| 20 |
Correct |
6 ms |
512 KB |
Output is correct |
| 21 |
Correct |
6 ms |
512 KB |
Output is correct |
| 22 |
Correct |
6 ms |
512 KB |
Output is correct |
| 23 |
Correct |
6 ms |
512 KB |
Output is correct |
| 24 |
Correct |
6 ms |
512 KB |
Output is correct |
| 25 |
Correct |
6 ms |
512 KB |
Output is correct |
| 26 |
Correct |
8 ms |
512 KB |
Output is correct |
| 27 |
Correct |
7 ms |
512 KB |
Output is correct |
| 28 |
Correct |
6 ms |
512 KB |
Output is correct |
| 29 |
Correct |
8 ms |
512 KB |
Output is correct |
| 30 |
Correct |
11 ms |
512 KB |
Output is correct |
| 31 |
Correct |
6 ms |
512 KB |
Output is correct |
| 32 |
Correct |
6 ms |
512 KB |
Output is correct |
| 33 |
Correct |
6 ms |
512 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
5 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 |
512 KB |
Output is correct |
| 6 |
Correct |
6 ms |
512 KB |
Output is correct |
| 7 |
Correct |
7 ms |
512 KB |
Output is correct |
| 8 |
Correct |
7 ms |
512 KB |
Output is correct |
| 9 |
Correct |
7 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 |
7 ms |
512 KB |
Output is correct |
| 14 |
Correct |
7 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 |
9 ms |
512 KB |
Output is correct |
| 18 |
Correct |
8 ms |
512 KB |
Output is correct |
| 19 |
Correct |
6 ms |
512 KB |
Output is correct |
| 20 |
Correct |
6 ms |
512 KB |
Output is correct |
| 21 |
Correct |
6 ms |
512 KB |
Output is correct |
| 22 |
Correct |
6 ms |
512 KB |
Output is correct |
| 23 |
Correct |
6 ms |
512 KB |
Output is correct |
| 24 |
Correct |
6 ms |
512 KB |
Output is correct |
| 25 |
Correct |
6 ms |
512 KB |
Output is correct |
| 26 |
Correct |
8 ms |
512 KB |
Output is correct |
| 27 |
Correct |
7 ms |
512 KB |
Output is correct |
| 28 |
Correct |
6 ms |
512 KB |
Output is correct |
| 29 |
Correct |
8 ms |
512 KB |
Output is correct |
| 30 |
Correct |
11 ms |
512 KB |
Output is correct |
| 31 |
Correct |
6 ms |
512 KB |
Output is correct |
| 32 |
Correct |
6 ms |
512 KB |
Output is correct |
| 33 |
Correct |
6 ms |
512 KB |
Output is correct |
| 34 |
Correct |
428 ms |
34680 KB |
Output is correct |
| 35 |
Correct |
444 ms |
44584 KB |
Output is correct |
| 36 |
Correct |
443 ms |
43872 KB |
Output is correct |
| 37 |
Correct |
440 ms |
44792 KB |
Output is correct |
| 38 |
Correct |
404 ms |
44664 KB |
Output is correct |
| 39 |
Correct |
401 ms |
43896 KB |
Output is correct |
| 40 |
Correct |
432 ms |
47352 KB |
Output is correct |
| 41 |
Correct |
364 ms |
45048 KB |
Output is correct |
| 42 |
Correct |
438 ms |
46452 KB |
Output is correct |
| 43 |
Correct |
469 ms |
47988 KB |
Output is correct |
| 44 |
Correct |
451 ms |
47992 KB |
Output is correct |
| 45 |
Correct |
483 ms |
47988 KB |
Output is correct |
| 46 |
Correct |
439 ms |
47960 KB |
Output is correct |
| 47 |
Correct |
427 ms |
47196 KB |
Output is correct |
| 48 |
Correct |
412 ms |
47108 KB |
Output is correct |
| 49 |
Correct |
421 ms |
47708 KB |
Output is correct |
| 50 |
Correct |
456 ms |
47196 KB |
Output is correct |
| 51 |
Correct |
460 ms |
47260 KB |
Output is correct |
| 52 |
Correct |
336 ms |
36476 KB |
Output is correct |
| 53 |
Correct |
324 ms |
36340 KB |
Output is correct |
| 54 |
Correct |
293 ms |
36344 KB |
Output is correct |
| 55 |
Correct |
315 ms |
36076 KB |
Output is correct |
| 56 |
Correct |
417 ms |
48376 KB |
Output is correct |
| 57 |
Correct |
365 ms |
43148 KB |
Output is correct |
| 58 |
Correct |
370 ms |
43208 KB |
Output is correct |
| 59 |
Correct |
367 ms |
43208 KB |
Output is correct |
| 60 |
Correct |
346 ms |
41088 KB |
Output is correct |
| 61 |
Correct |
380 ms |
43740 KB |
Output is correct |
| 62 |
Correct |
365 ms |
43108 KB |
Output is correct |
| 63 |
Correct |
389 ms |
43844 KB |
Output is correct |
| 64 |
Correct |
368 ms |
42264 KB |
Output is correct |
| 65 |
Correct |
370 ms |
43692 KB |
Output is correct |
