# | Submission time | Handle | Problem | Language | Result | Execution time | Memory |
---|---|---|---|---|---|---|---|
252027 | 2020-07-23T19:19:07 Z | Bruteforceman | Building 4 (JOI20_building4) | C++11 | 422 ms | 38288 KB |
#include "bits/stdc++.h" using namespace std; int a[2][500010 * 2]; int main(int argc, char const *argv[]) { int n; scanf("%d", &n); for(int x = 0; x < 2; x++) { for(int i = 0; i < 2*n; i++) { scanf("%d", &a[x][i]); } } vector <int> v; if(a[0][0] <= a[1][0]) { v.push_back(0); } else { v.push_back(1); } for(int i = 0; i < 2*n - 1; i++) { int opt = -1; for(int x = 0; x < 2; x++) { if(a[v.back()][i] <= a[x][i + 1]) { if(opt == -1 || a[x][i + 1] < a[opt][i + 1]) { opt = x; } } } if(opt == -1) { puts("-1"); exit(0); } v.push_back(opt); } vector <int> p (2*n + 1); vector <int> nxt (2*n + 1); p[2*n] = 0; for(int i = 2*n-1; i >= 0; i--) { p[i] = p[i + 1] + ((v[i] == 0) ? -1 : 1); if(i == 2*n - 1 || a[v[i] ^ 1][i] <= a[v[i + 1]][i + 1]) { nxt[i] = i; } else { if(a[v[i] ^ 1][i] <= a[v[i + 1] ^ 1][i + 1]) nxt[i] = nxt[i + 1]; else nxt[i] = -1; } if(a[v[i]][i] > a[v[i] ^ 1][i]) { nxt[i] = -1; } } int sum = p[0]; int last = 2*n; for(int i = 2*n - 1; i >= 0; i--) { if(nxt[i] == -1) continue; int c = min(nxt[i] + 1, last); int profit = p[c] - p[i]; if(abs(sum + 2*profit) < abs(sum)) { sum += 2*profit; for(int j = i; j < c; j++) { v[j] ^= 1; } last = i; } } if(sum == 0) { for(int i = 0; i < 2*n; i++) printf("%c", v[i] + 'A'); printf("\n"); } else printf("-1\n"); return 0; }
Compilation message
# | 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 | 2 ms | 384 KB | Output is correct |
6 | Correct | 2 ms | 512 KB | Output is correct |
7 | Correct | 2 ms | 512 KB | Output is correct |
8 | Correct | 2 ms | 512 KB | Output is correct |
9 | Correct | 2 ms | 512 KB | Output is correct |
10 | Correct | 2 ms | 512 KB | Output is correct |
11 | Correct | 3 ms | 512 KB | Output is correct |
12 | Correct | 2 ms | 512 KB | Output is correct |
13 | Correct | 2 ms | 512 KB | Output is correct |
14 | Correct | 2 ms | 512 KB | Output is correct |
15 | Correct | 2 ms | 512 KB | Output is correct |
16 | Correct | 2 ms | 512 KB | Output is correct |
17 | Correct | 2 ms | 512 KB | Output is correct |
18 | Correct | 2 ms | 512 KB | Output is correct |
19 | Correct | 2 ms | 512 KB | Output is correct |
20 | Correct | 2 ms | 384 KB | Output is correct |
21 | Correct | 1 ms | 384 KB | Output is correct |
22 | Correct | 2 ms | 384 KB | Output is correct |
23 | Correct | 2 ms | 384 KB | Output is correct |
24 | Correct | 2 ms | 512 KB | Output is correct |
25 | Correct | 2 ms | 512 KB | Output is correct |
26 | Correct | 2 ms | 512 KB | Output is correct |
27 | Correct | 2 ms | 384 KB | Output is correct |
28 | Correct | 1 ms | 384 KB | Output is correct |
29 | Correct | 2 ms | 384 KB | Output is correct |
30 | Correct | 2 ms | 384 KB | Output is correct |
31 | Correct | 2 ms | 384 KB | Output is correct |
32 | Correct | 1 ms | 384 KB | Output is correct |
33 | Correct | 2 ms | 512 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 | 2 ms | 384 KB | Output is correct |
6 | Correct | 2 ms | 512 KB | Output is correct |
7 | Correct | 2 ms | 512 KB | Output is correct |
8 | Correct | 2 ms | 512 KB | Output is correct |
9 | Correct | 2 ms | 512 KB | Output is correct |
10 | Correct | 2 ms | 512 KB | Output is correct |
11 | Correct | 3 ms | 512 KB | Output is correct |
12 | Correct | 2 ms | 512 KB | Output is correct |
13 | Correct | 2 ms | 512 KB | Output is correct |
14 | Correct | 2 ms | 512 KB | Output is correct |
15 | Correct | 2 ms | 512 KB | Output is correct |
16 | Correct | 2 ms | 512 KB | Output is correct |
17 | Correct | 2 ms | 512 KB | Output is correct |
18 | Correct | 2 ms | 512 KB | Output is correct |
19 | Correct | 2 ms | 512 KB | Output is correct |
20 | Correct | 2 ms | 384 KB | Output is correct |
21 | Correct | 1 ms | 384 KB | Output is correct |
22 | Correct | 2 ms | 384 KB | Output is correct |
23 | Correct | 2 ms | 384 KB | Output is correct |
24 | Correct | 2 ms | 512 KB | Output is correct |
25 | Correct | 2 ms | 512 KB | Output is correct |
26 | Correct | 2 ms | 512 KB | Output is correct |
27 | Correct | 2 ms | 384 KB | Output is correct |
28 | Correct | 1 ms | 384 KB | Output is correct |
29 | Correct | 2 ms | 384 KB | Output is correct |
30 | Correct | 2 ms | 384 KB | Output is correct |
31 | Correct | 2 ms | 384 KB | Output is correct |
32 | Correct | 1 ms | 384 KB | Output is correct |
33 | Correct | 2 ms | 512 KB | Output is correct |
34 | Correct | 362 ms | 10436 KB | Output is correct |
35 | Correct | 402 ms | 37468 KB | Output is correct |
36 | Correct | 375 ms | 36828 KB | Output is correct |
37 | Correct | 390 ms | 37596 KB | Output is correct |
38 | Correct | 366 ms | 37632 KB | Output is correct |
39 | Correct | 344 ms | 36872 KB | Output is correct |
40 | Correct | 358 ms | 23388 KB | Output is correct |
41 | Correct | 316 ms | 37804 KB | Output is correct |
42 | Correct | 394 ms | 26716 KB | Output is correct |
43 | Correct | 422 ms | 23380 KB | Output is correct |
44 | Correct | 407 ms | 23440 KB | Output is correct |
45 | Correct | 420 ms | 23516 KB | Output is correct |
46 | Correct | 367 ms | 23388 KB | Output is correct |
47 | Correct | 367 ms | 32732 KB | Output is correct |
48 | Correct | 369 ms | 38288 KB | Output is correct |
49 | Correct | 369 ms | 23484 KB | Output is correct |
50 | Correct | 394 ms | 30940 KB | Output is correct |
51 | Correct | 394 ms | 30708 KB | Output is correct |
52 | Correct | 291 ms | 28592 KB | Output is correct |
53 | Correct | 309 ms | 28768 KB | Output is correct |
54 | Correct | 277 ms | 28764 KB | Output is correct |
55 | Correct | 270 ms | 28508 KB | Output is correct |
56 | Correct | 373 ms | 23516 KB | Output is correct |
57 | Correct | 316 ms | 35552 KB | Output is correct |
58 | Correct | 320 ms | 35800 KB | Output is correct |
59 | Correct | 321 ms | 35804 KB | Output is correct |
60 | Correct | 302 ms | 34012 KB | Output is correct |
61 | Correct | 337 ms | 36316 KB | Output is correct |
62 | Correct | 325 ms | 35548 KB | Output is correct |
63 | Correct | 339 ms | 36188 KB | Output is correct |
64 | Correct | 306 ms | 35036 KB | Output is correct |
65 | Correct | 324 ms | 36060 KB | Output is correct |