# | 제출 시각 | 아이디 | 문제 | 언어 | 결과 | 실행 시간 | 메모리 |
---|---|---|---|---|---|---|---|
219039 | 2020-04-03T12:56:31 Z | Nightlight | 건물 4 (JOI20_building4) | C++14 | 454 ms | 105928 KB |
#include <cstdio> #include <stdlib.h> #include <utility> #include <algorithm> #define mn first #define mx second using namespace std; int N; int A[1000005][2]; bool vis[1000005][2]; pair<int, int> dp[1000005][2]; void DFS(int u, int i) { if(vis[u][i]) return; vis[u][i] = 1; int mn = 2000000000, mx = -2000000000; if(A[u][i] <= A[u + 1][0]) { DFS(u + 1, 0); mn = min(dp[u + 1][0].mn + 1, mn); mx = max(dp[u + 1][0].mx + 1, mx); } if(A[u][i] <= A[u + 1][1]) { DFS(u + 1, 1); mn = min(dp[u + 1][1].mn, mn); mx = max(dp[u + 1][1].mx, mx); } dp[u][i] = make_pair(mn, mx); } void backtrack() { if(dp[0][0] == make_pair(2000000000, -2000000000) || dp[0][0].mn > N >> 1 || dp[0][0].mx < N >> 1) { puts("-1"); exit(0); } int last = 0, cur = N >> 1; for(int i = 0; i < N; i++) { if(A[i][last] <= A[i + 1][0] && dp[i + 1][0].mn <= cur - 1 && cur - 1 <= dp[i + 1][0].mx) { last = 0; cur--; putchar('A'); continue; } last = 1; putchar('B'); } } int main() { scanf("%d", &N); N <<= 1; for(int i = 1; i <= N; i++) { scanf("%d", &A[i][0]); } for(int i = 1; i <= N; i++) { scanf("%d", &A[i][1]); } vis[N][0] = 1, vis[N][1] = 1; dp[N][0] = make_pair(0, 0), dp[N][1] = make_pair(0, 0); DFS(0, 0); backtrack(); }
Compilation message
# | 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 | 5 ms | 384 KB | Output is correct |
4 | Correct | 4 ms | 256 KB | Output is correct |
5 | Correct | 6 ms | 384 KB | Output is correct |
6 | Correct | 6 ms | 768 KB | Output is correct |
7 | Correct | 6 ms | 640 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 | 640 KB | Output is correct |
11 | Correct | 6 ms | 768 KB | Output is correct |
12 | Correct | 7 ms | 768 KB | Output is correct |
13 | Correct | 6 ms | 768 KB | Output is correct |
14 | Correct | 6 ms | 768 KB | Output is correct |
15 | Correct | 7 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 | 768 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 | 768 KB | Output is correct |
23 | Correct | 6 ms | 768 KB | Output is correct |
24 | Correct | 6 ms | 760 KB | Output is correct |
25 | Correct | 6 ms | 768 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 | 768 KB | Output is correct |
30 | Correct | 6 ms | 768 KB | Output is correct |
31 | Correct | 6 ms | 768 KB | Output is correct |
32 | Correct | 5 ms | 640 KB | Output is correct |
33 | Correct | 6 ms | 768 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 | 5 ms | 384 KB | Output is correct |
4 | Correct | 4 ms | 256 KB | Output is correct |
5 | Correct | 6 ms | 384 KB | Output is correct |
6 | Correct | 6 ms | 768 KB | Output is correct |
7 | Correct | 6 ms | 640 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 | 640 KB | Output is correct |
11 | Correct | 6 ms | 768 KB | Output is correct |
12 | Correct | 7 ms | 768 KB | Output is correct |
13 | Correct | 6 ms | 768 KB | Output is correct |
14 | Correct | 6 ms | 768 KB | Output is correct |
15 | Correct | 7 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 | 768 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 | 768 KB | Output is correct |
23 | Correct | 6 ms | 768 KB | Output is correct |
24 | Correct | 6 ms | 760 KB | Output is correct |
25 | Correct | 6 ms | 768 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 | 768 KB | Output is correct |
30 | Correct | 6 ms | 768 KB | Output is correct |
31 | Correct | 6 ms | 768 KB | Output is correct |
32 | Correct | 5 ms | 640 KB | Output is correct |
33 | Correct | 6 ms | 768 KB | Output is correct |
34 | Correct | 357 ms | 8392 KB | Output is correct |
35 | Correct | 421 ms | 97528 KB | Output is correct |
36 | Correct | 412 ms | 96124 KB | Output is correct |
37 | Correct | 411 ms | 98040 KB | Output is correct |
38 | Correct | 395 ms | 97912 KB | Output is correct |
39 | Correct | 377 ms | 98424 KB | Output is correct |
40 | Correct | 408 ms | 104724 KB | Output is correct |
41 | Correct | 403 ms | 99960 KB | Output is correct |
42 | Correct | 408 ms | 101752 KB | Output is correct |
43 | Correct | 441 ms | 105080 KB | Output is correct |
44 | Correct | 453 ms | 105336 KB | Output is correct |
45 | Correct | 443 ms | 105208 KB | Output is correct |
46 | Correct | 418 ms | 105208 KB | Output is correct |
47 | Correct | 405 ms | 105208 KB | Output is correct |
48 | Correct | 404 ms | 105212 KB | Output is correct |
49 | Correct | 418 ms | 105208 KB | Output is correct |
50 | Correct | 439 ms | 105208 KB | Output is correct |
51 | Correct | 454 ms | 105208 KB | Output is correct |
52 | Correct | 326 ms | 105928 KB | Output is correct |
53 | Correct | 325 ms | 105848 KB | Output is correct |
54 | Correct | 321 ms | 105720 KB | Output is correct |
55 | Correct | 317 ms | 105872 KB | Output is correct |
56 | Correct | 438 ms | 105080 KB | Output is correct |
57 | Correct | 377 ms | 104952 KB | Output is correct |
58 | Correct | 381 ms | 105464 KB | Output is correct |
59 | Correct | 359 ms | 105336 KB | Output is correct |
60 | Correct | 340 ms | 99012 KB | Output is correct |
61 | Correct | 356 ms | 105336 KB | Output is correct |
62 | Correct | 363 ms | 103636 KB | Output is correct |
63 | Correct | 361 ms | 105208 KB | Output is correct |
64 | Correct | 358 ms | 101624 KB | Output is correct |
65 | Correct | 352 ms | 105080 KB | Output is correct |