| # |
Submission time |
Handle |
Problem |
Language |
Result |
Execution time |
Memory |
| 626064 |
2022-08-11T07:43:02 Z |
54skyxenon |
Mecho (IOI09_mecho) |
Python 3 |
|
1000 ms |
17340 KB |
# https://oj.uz/problem/view/IOI09_mecho
from collections import deque
from math import ceil
n, s = map(int, input().split())
forest = []
for _ in range(n):
forest.append(input())
start = None
end = None
hives = []
for i in range(n):
for j in range(n):
if forest[i][j] == 'M':
start = (i, j)
if forest[i][j] == 'D':
end = (i, j)
if forest[i][j] == 'H':
hives.append((i, j))
dist_hive = [[float('inf')] * n for _ in range(n)]
hives_Q = deque()
for i, j in hives:
dist_hive[i][j] = 0
hives_Q.append((i, j, 0))
while hives_Q:
r, c, depth = hives_Q.popleft()
for nr, nc in [(r + 1, c), (r - 1, c), (r, c + 1), (r, c - 1)]:
if 0 <= nr < n and 0 <= nc < n and forest[nr][nc] == 'G' and dist_hive[nr][nc] == float('inf'):
hives_Q.append((nr, nc, depth + 1))
dist_hive[nr][nc] = depth + 1
def bs(lo, hi):
global dist_hive
def ok(midd):
seen = [[False] * n for _ in range(n)]
seen[start[0]][start[1]] = True
mecho_Q = deque([(start[0], start[1], 0)])
while mecho_Q:
r, c, depth = mecho_Q.popleft()
if (r, c) == end:
return True
for nr, nc in [(r + 1, c), (r - 1, c), (r, c + 1), (r, c - 1)]:
if 0 <= nr < n and 0 <= nc < n and forest[nr][nc] in {'G', 'D'} and (midd + ((depth + 1) // s)) < dist_hive[nr][nc] and not seen[nr][nc]:
seen[nr][nc] = True
mecho_Q.append((nr, nc, depth + 1))
return False
lo -= 1
while lo < hi:
mid = lo + (hi - lo + 1) // 2
if ok(mid):
lo = mid
else:
hi = mid - 1
return lo
print(bs(0, n ** 2))
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
15 ms |
3284 KB |
Output is correct |
| 2 |
Correct |
16 ms |
3284 KB |
Output is correct |
| 3 |
Correct |
18 ms |
3288 KB |
Output is correct |
| 4 |
Correct |
16 ms |
3396 KB |
Output is correct |
| 5 |
Correct |
16 ms |
3388 KB |
Output is correct |
| 6 |
Correct |
16 ms |
3404 KB |
Output is correct |
| 7 |
Execution timed out |
1090 ms |
10652 KB |
Time limit exceeded |
| 8 |
Correct |
16 ms |
3412 KB |
Output is correct |
| 9 |
Correct |
20 ms |
3412 KB |
Output is correct |
| 10 |
Correct |
17 ms |
3320 KB |
Output is correct |
| 11 |
Correct |
17 ms |
3368 KB |
Output is correct |
| 12 |
Incorrect |
26 ms |
3460 KB |
Output isn't correct |
| 13 |
Incorrect |
26 ms |
3412 KB |
Output isn't correct |
| 14 |
Correct |
41 ms |
3464 KB |
Output is correct |
| 15 |
Correct |
16 ms |
3412 KB |
Output is correct |
| 16 |
Correct |
17 ms |
3284 KB |
Output is correct |
| 17 |
Correct |
16 ms |
3412 KB |
Output is correct |
| 18 |
Correct |
18 ms |
3416 KB |
Output is correct |
| 19 |
Correct |
18 ms |
3392 KB |
Output is correct |
| 20 |
Correct |
19 ms |
3380 KB |
Output is correct |
| 21 |
Correct |
19 ms |
3412 KB |
Output is correct |
| 22 |
Correct |
21 ms |
3388 KB |
Output is correct |
| 23 |
Correct |
22 ms |
3448 KB |
Output is correct |
| 24 |
Correct |
22 ms |
3412 KB |
Output is correct |
| 25 |
Correct |
24 ms |
3448 KB |
Output is correct |
| 26 |
Correct |
29 ms |
3380 KB |
Output is correct |
| 27 |
Correct |
27 ms |
3408 KB |
Output is correct |
| 28 |
Correct |
30 ms |
3448 KB |
Output is correct |
| 29 |
Correct |
27 ms |
3520 KB |
Output is correct |
| 30 |
Correct |
29 ms |
3524 KB |
Output is correct |
| 31 |
Correct |
29 ms |
3460 KB |
Output is correct |
| 32 |
Correct |
33 ms |
3504 KB |
Output is correct |
| 33 |
Correct |
267 ms |
7396 KB |
Output is correct |
| 34 |
Correct |
294 ms |
7424 KB |
Output is correct |
| 35 |
Execution timed out |
1086 ms |
6776 KB |
Time limit exceeded |
| 36 |
Correct |
373 ms |
8752 KB |
Output is correct |
| 37 |
Correct |
405 ms |
8708 KB |
Output is correct |
| 38 |
Execution timed out |
1088 ms |
8120 KB |
Time limit exceeded |
| 39 |
Correct |
475 ms |
10120 KB |
Output is correct |
| 40 |
Correct |
481 ms |
10248 KB |
Output is correct |
| 41 |
Execution timed out |
1086 ms |
9784 KB |
Time limit exceeded |
| 42 |
Correct |
581 ms |
11696 KB |
Output is correct |
| 43 |
Correct |
607 ms |
11712 KB |
Output is correct |
| 44 |
Execution timed out |
1092 ms |
11656 KB |
Time limit exceeded |
| 45 |
Correct |
691 ms |
13424 KB |
Output is correct |
| 46 |
Correct |
813 ms |
13444 KB |
Output is correct |
| 47 |
Execution timed out |
1062 ms |
13732 KB |
Time limit exceeded |
| 48 |
Correct |
864 ms |
15296 KB |
Output is correct |
| 49 |
Correct |
877 ms |
15228 KB |
Output is correct |
| 50 |
Execution timed out |
1089 ms |
11824 KB |
Time limit exceeded |
| 51 |
Execution timed out |
1097 ms |
13784 KB |
Time limit exceeded |
| 52 |
Execution timed out |
1067 ms |
17284 KB |
Time limit exceeded |
| 53 |
Execution timed out |
1069 ms |
11176 KB |
Time limit exceeded |
| 54 |
Execution timed out |
1093 ms |
13464 KB |
Time limit exceeded |
| 55 |
Execution timed out |
1094 ms |
13984 KB |
Time limit exceeded |
| 56 |
Execution timed out |
1089 ms |
12216 KB |
Time limit exceeded |
| 57 |
Execution timed out |
1098 ms |
16972 KB |
Time limit exceeded |
| 58 |
Execution timed out |
1091 ms |
17160 KB |
Time limit exceeded |
| 59 |
Execution timed out |
1089 ms |
14196 KB |
Time limit exceeded |
| 60 |
Execution timed out |
1091 ms |
17340 KB |
Time limit exceeded |
| 61 |
Execution timed out |
1082 ms |
17136 KB |
Time limit exceeded |
| 62 |
Execution timed out |
1084 ms |
14072 KB |
Time limit exceeded |
| 63 |
Execution timed out |
1088 ms |
16180 KB |
Time limit exceeded |
| 64 |
Execution timed out |
1078 ms |
16824 KB |
Time limit exceeded |
| 65 |
Execution timed out |
1092 ms |
17336 KB |
Time limit exceeded |
| 66 |
Execution timed out |
1092 ms |
16180 KB |
Time limit exceeded |
| 67 |
Execution timed out |
1088 ms |
17124 KB |
Time limit exceeded |
| 68 |
Execution timed out |
1094 ms |
9576 KB |
Time limit exceeded |
| 69 |
Execution timed out |
1090 ms |
9456 KB |
Time limit exceeded |
| 70 |
Execution timed out |
1099 ms |
9568 KB |
Time limit exceeded |
| 71 |
Execution timed out |
1085 ms |
9540 KB |
Time limit exceeded |
| 72 |
Execution timed out |
1094 ms |
9488 KB |
Time limit exceeded |
| 73 |
Execution timed out |
1090 ms |
13292 KB |
Time limit exceeded |
| 74 |
Execution timed out |
1054 ms |
13364 KB |
Time limit exceeded |
| 75 |
Execution timed out |
1053 ms |
13128 KB |
Time limit exceeded |
| 76 |
Execution timed out |
1084 ms |
13368 KB |
Time limit exceeded |
| 77 |
Execution timed out |
1085 ms |
13192 KB |
Time limit exceeded |
| 78 |
Execution timed out |
1078 ms |
12144 KB |
Time limit exceeded |
| 79 |
Execution timed out |
1092 ms |
12280 KB |
Time limit exceeded |
| 80 |
Execution timed out |
1085 ms |
12276 KB |
Time limit exceeded |
| 81 |
Execution timed out |
1083 ms |
12396 KB |
Time limit exceeded |
| 82 |
Execution timed out |
1094 ms |
12196 KB |
Time limit exceeded |
| 83 |
Execution timed out |
1083 ms |
12120 KB |
Time limit exceeded |
| 84 |
Execution timed out |
1070 ms |
12192 KB |
Time limit exceeded |
| 85 |
Execution timed out |
1083 ms |
12080 KB |
Time limit exceeded |
| 86 |
Execution timed out |
1080 ms |
12156 KB |
Time limit exceeded |
| 87 |
Execution timed out |
1090 ms |
12112 KB |
Time limit exceeded |
| 88 |
Execution timed out |
1092 ms |
11464 KB |
Time limit exceeded |
| 89 |
Execution timed out |
1082 ms |
11488 KB |
Time limit exceeded |
| 90 |
Execution timed out |
1089 ms |
11396 KB |
Time limit exceeded |
| 91 |
Execution timed out |
1092 ms |
11440 KB |
Time limit exceeded |
| 92 |
Execution timed out |
1088 ms |
11428 KB |
Time limit exceeded |
