/* https://www.ioi-jp.org/camp/2016/2016-sp-tasks/2016-sp-d2-sandwich-review.pdf */
#include <stdio.h>
#include <string.h>
#define N 400
#define M 400
#define INF 0x3f3f3f3f
int min(int a, int b) { return a < b ? a : b; }
char cc[N][M + 1], visited[N][M], tt[N][M]; int n, m, cnt;
int dfs(int i, int j, int t) {
if (visited[i][j])
return visited[i][j] == 2 || tt[i][j] != t;
visited[i][j] = 2, tt[i][j] = t, cnt++;
if (t == 0) {
if (j + 1 < m && dfs(i, j + 1, 0))
return 1;
if (cc[i][j] == 'N' && i > 0 && dfs(i - 1, j, cc[i - 1][j] == 'N' ? 0 : 1))
return 1;
if (cc[i][j] == 'Z' && i + 1 < n && dfs(i + 1, j, cc[i + 1][j] == 'Z' ? 0 : 1))
return 1;
} else {
if (j > 0 && dfs(i, j - 1, 1))
return 1;
if (cc[i][j] == 'Z' && i > 0 && dfs(i - 1, j, cc[i - 1][j] == 'N' ? 0 : 1))
return 1;
if (cc[i][j] == 'N' && i + 1 < n && dfs(i + 1, j, cc[i + 1][j] == 'Z' ? 0 : 1))
return 1;
}
visited[i][j] = 1;
return 0;
}
int main() {
static int ans[N][M];
int i, i_, j, j1, j2, r, tmp;
scanf("%d%d", &n, &m);
for (i = 0; i < n; i++)
scanf("%s", cc[i]);
for (i = 0; i < n; i++)
memset(ans[i], 0x3f, m * sizeof *ans[i]);
for (r = 0; r < 2; r++) {
for (i = 0; i < n; i++) {
for (i_ = 0; i_ < n; i_++)
memset(visited[i_], 0, m * sizeof *visited[i_]);
cnt = 0;
for (j = 0; j < m; j++) {
if (dfs(i, j, 1))
break;
ans[i][j] = min(ans[i][j], cnt * 2);
}
}
for (i = 0; i < n; i++) {
for (j1 = 0, j2 = m - 1; j1 < j2; j1++, j2--) {
tmp = cc[i][j1], cc[i][j1] = cc[i][j2], cc[i][j2] = tmp;
tmp = ans[i][j1], ans[i][j1] = ans[i][j2], ans[i][j2] = tmp;
}
for (j = 0; j < m; j++)
cc[i][j] = cc[i][j] == 'N' ? 'Z' : 'N';
}
}
for (i = 0; i < n; i++) {
for (j = 0; j < m; j++)
printf("%d ", ans[i][j] == INF ? -1 : ans[i][j]);
printf("\n");
}
return 0;
}
Compilation message
sandwich.c: In function 'main':
sandwich.c:40:2: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
40 | scanf("%d%d", &n, &m);
| ^~~~~~~~~~~~~~~~~~~~~
sandwich.c:42:3: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
42 | scanf("%s", cc[i]);
| ^~~~~~~~~~~~~~~~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
0 ms |
212 KB |
Output is correct |
| 2 |
Correct |
1 ms |
212 KB |
Output is correct |
| 3 |
Correct |
1 ms |
340 KB |
Output is correct |
| 4 |
Correct |
1 ms |
212 KB |
Output is correct |
| 5 |
Correct |
1 ms |
420 KB |
Output is correct |
| 6 |
Correct |
1 ms |
340 KB |
Output is correct |
| 7 |
Correct |
2 ms |
340 KB |
Output is correct |
| 8 |
Correct |
2 ms |
340 KB |
Output is correct |
| 9 |
Correct |
2 ms |
420 KB |
Output is correct |
| 10 |
Correct |
2 ms |
340 KB |
Output is correct |
| 11 |
Correct |
3 ms |
340 KB |
Output is correct |
| 12 |
Correct |
2 ms |
340 KB |
Output is correct |
| 13 |
Correct |
3 ms |
340 KB |
Output is correct |
| 14 |
Correct |
2 ms |
420 KB |
Output is correct |
| 15 |
Correct |
2 ms |
340 KB |
Output is correct |
| 16 |
Correct |
2 ms |
340 KB |
Output is correct |
| 17 |
Correct |
2 ms |
340 KB |
Output is correct |
| 18 |
Correct |
2 ms |
340 KB |
Output is correct |
| 19 |
Correct |
2 ms |
340 KB |
Output is correct |
| 20 |
Correct |
2 ms |
340 KB |
Output is correct |
| 21 |
Correct |
2 ms |
340 KB |
Output is correct |
| 22 |
Correct |
2 ms |
340 KB |
Output is correct |
| 23 |
Correct |
2 ms |
416 KB |
Output is correct |
| 24 |
Correct |
2 ms |
340 KB |
Output is correct |
| 25 |
Correct |
2 ms |
444 KB |
Output is correct |
| 26 |
Correct |
2 ms |
340 KB |
Output is correct |
| 27 |
Correct |
3 ms |
596 KB |
Output is correct |
| 28 |
Correct |
2 ms |
596 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
0 ms |
212 KB |
Output is correct |
| 2 |
Correct |
1 ms |
212 KB |
Output is correct |
| 3 |
Correct |
1 ms |
340 KB |
Output is correct |
| 4 |
Correct |
1 ms |
212 KB |
Output is correct |
| 5 |
Correct |
1 ms |
420 KB |
Output is correct |
| 6 |
Correct |
1 ms |
340 KB |
Output is correct |
| 7 |
Correct |
2 ms |
340 KB |
Output is correct |
| 8 |
Correct |
2 ms |
340 KB |
Output is correct |
| 9 |
Correct |
2 ms |
420 KB |
Output is correct |
| 10 |
Correct |
2 ms |
340 KB |
Output is correct |
| 11 |
Correct |
3 ms |
340 KB |
Output is correct |
| 12 |
Correct |
2 ms |
340 KB |
Output is correct |
| 13 |
Correct |
3 ms |
340 KB |
Output is correct |
| 14 |
Correct |
2 ms |
420 KB |
Output is correct |
| 15 |
Correct |
2 ms |
340 KB |
Output is correct |
| 16 |
Correct |
2 ms |
340 KB |
Output is correct |
| 17 |
Correct |
2 ms |
340 KB |
Output is correct |
| 18 |
Correct |
2 ms |
340 KB |
Output is correct |
| 19 |
Correct |
2 ms |
340 KB |
Output is correct |
| 20 |
Correct |
2 ms |
340 KB |
Output is correct |
| 21 |
Correct |
2 ms |
340 KB |
Output is correct |
| 22 |
Correct |
2 ms |
340 KB |
Output is correct |
| 23 |
Correct |
2 ms |
416 KB |
Output is correct |
| 24 |
Correct |
2 ms |
340 KB |
Output is correct |
| 25 |
Correct |
2 ms |
444 KB |
Output is correct |
| 26 |
Correct |
2 ms |
340 KB |
Output is correct |
| 27 |
Correct |
3 ms |
596 KB |
Output is correct |
| 28 |
Correct |
2 ms |
596 KB |
Output is correct |
| 29 |
Correct |
0 ms |
212 KB |
Output is correct |
| 30 |
Correct |
4 ms |
1364 KB |
Output is correct |
| 31 |
Correct |
23 ms |
2188 KB |
Output is correct |
| 32 |
Correct |
25 ms |
2220 KB |
Output is correct |
| 33 |
Correct |
8 ms |
1424 KB |
Output is correct |
| 34 |
Correct |
677 ms |
2444 KB |
Output is correct |
| 35 |
Correct |
488 ms |
2008 KB |
Output is correct |
| 36 |
Correct |
14 ms |
1412 KB |
Output is correct |
| 37 |
Correct |
707 ms |
2468 KB |
Output is correct |
| 38 |
Correct |
445 ms |
2448 KB |
Output is correct |
| 39 |
Correct |
632 ms |
2336 KB |
Output is correct |
| 40 |
Correct |
1269 ms |
2716 KB |
Output is correct |
| 41 |
Correct |
456 ms |
1792 KB |
Output is correct |
| 42 |
Correct |
1043 ms |
2848 KB |
Output is correct |
| 43 |
Correct |
1030 ms |
3016 KB |
Output is correct |
| 44 |
Correct |
1070 ms |
2772 KB |
Output is correct |
| 45 |
Correct |
655 ms |
2432 KB |
Output is correct |
| 46 |
Correct |
432 ms |
2460 KB |
Output is correct |
| 47 |
Correct |
620 ms |
2448 KB |
Output is correct |
| 48 |
Correct |
338 ms |
2120 KB |
Output is correct |
| 49 |
Correct |
475 ms |
2448 KB |
Output is correct |
| 50 |
Correct |
541 ms |
2448 KB |
Output is correct |
| 51 |
Correct |
441 ms |
2572 KB |
Output is correct |
| 52 |
Correct |
452 ms |
2436 KB |
Output is correct |
| 53 |
Correct |
451 ms |
2508 KB |
Output is correct |
| 54 |
Correct |
422 ms |
2308 KB |
Output is correct |
| 55 |
Correct |
439 ms |
2440 KB |
Output is correct |
| 56 |
Correct |
432 ms |
2444 KB |
Output is correct |
| 57 |
Correct |
349 ms |
2144 KB |
Output is correct |
| 58 |
Correct |
986 ms |
2688 KB |
Output is correct |
| 59 |
Correct |
1025 ms |
2820 KB |
Output is correct |
| 60 |
Correct |
690 ms |
2244 KB |
Output is correct |
| 61 |
Correct |
1045 ms |
2780 KB |
Output is correct |
| 62 |
Correct |
1293 ms |
15024 KB |
Output is correct |
| 63 |
Correct |
1122 ms |
15032 KB |
Output is correct |
