| # |
Submission time |
Handle |
Problem |
Language |
Result |
Execution time |
Memory |
| 629677 |
2022-08-14T21:46:25 Z |
54skyxenon |
Mecho (IOI09_mecho) |
Python 3 |
|
1000 ms |
19648 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)])
if dist_hive[start[0]][start[1]] <= midd:
mecho_Q.popleft()
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 |
19 ms |
3380 KB |
Output is correct |
| 2 |
Correct |
18 ms |
3356 KB |
Output is correct |
| 3 |
Correct |
16 ms |
3312 KB |
Output is correct |
| 4 |
Correct |
18 ms |
3392 KB |
Output is correct |
| 5 |
Correct |
23 ms |
3312 KB |
Output is correct |
| 6 |
Correct |
17 ms |
3392 KB |
Output is correct |
| 7 |
Execution timed out |
1088 ms |
10580 KB |
Time limit exceeded |
| 8 |
Correct |
17 ms |
3344 KB |
Output is correct |
| 9 |
Correct |
24 ms |
3360 KB |
Output is correct |
| 10 |
Correct |
21 ms |
3380 KB |
Output is correct |
| 11 |
Correct |
19 ms |
3412 KB |
Output is correct |
| 12 |
Incorrect |
23 ms |
3420 KB |
Output isn't correct |
| 13 |
Incorrect |
27 ms |
3432 KB |
Output isn't correct |
| 14 |
Correct |
40 ms |
3444 KB |
Output is correct |
| 15 |
Correct |
17 ms |
3400 KB |
Output is correct |
| 16 |
Correct |
18 ms |
3380 KB |
Output is correct |
| 17 |
Correct |
17 ms |
3412 KB |
Output is correct |
| 18 |
Correct |
18 ms |
3308 KB |
Output is correct |
| 19 |
Correct |
18 ms |
3412 KB |
Output is correct |
| 20 |
Correct |
21 ms |
3328 KB |
Output is correct |
| 21 |
Correct |
19 ms |
3412 KB |
Output is correct |
| 22 |
Correct |
20 ms |
3412 KB |
Output is correct |
| 23 |
Correct |
21 ms |
3412 KB |
Output is correct |
| 24 |
Correct |
23 ms |
3412 KB |
Output is correct |
| 25 |
Correct |
23 ms |
3412 KB |
Output is correct |
| 26 |
Correct |
27 ms |
3464 KB |
Output is correct |
| 27 |
Correct |
25 ms |
3416 KB |
Output is correct |
| 28 |
Correct |
27 ms |
3436 KB |
Output is correct |
| 29 |
Correct |
27 ms |
3512 KB |
Output is correct |
| 30 |
Correct |
30 ms |
3484 KB |
Output is correct |
| 31 |
Correct |
29 ms |
3544 KB |
Output is correct |
| 32 |
Correct |
35 ms |
3456 KB |
Output is correct |
| 33 |
Correct |
260 ms |
7440 KB |
Output is correct |
| 34 |
Correct |
290 ms |
7404 KB |
Output is correct |
| 35 |
Execution timed out |
1090 ms |
6668 KB |
Time limit exceeded |
| 36 |
Correct |
356 ms |
8724 KB |
Output is correct |
| 37 |
Correct |
394 ms |
8648 KB |
Output is correct |
| 38 |
Execution timed out |
1089 ms |
8348 KB |
Time limit exceeded |
| 39 |
Correct |
441 ms |
10108 KB |
Output is correct |
| 40 |
Correct |
461 ms |
10108 KB |
Output is correct |
| 41 |
Execution timed out |
1084 ms |
9816 KB |
Time limit exceeded |
| 42 |
Correct |
559 ms |
11744 KB |
Output is correct |
| 43 |
Correct |
595 ms |
11632 KB |
Output is correct |
| 44 |
Execution timed out |
1085 ms |
11680 KB |
Time limit exceeded |
| 45 |
Correct |
659 ms |
13396 KB |
Output is correct |
| 46 |
Correct |
692 ms |
13352 KB |
Output is correct |
| 47 |
Execution timed out |
1091 ms |
13748 KB |
Time limit exceeded |
| 48 |
Correct |
756 ms |
15272 KB |
Output is correct |
| 49 |
Correct |
812 ms |
15348 KB |
Output is correct |
| 50 |
Execution timed out |
1096 ms |
16120 KB |
Time limit exceeded |
| 51 |
Correct |
903 ms |
17392 KB |
Output is correct |
| 52 |
Correct |
997 ms |
17404 KB |
Output is correct |
| 53 |
Execution timed out |
1062 ms |
13220 KB |
Time limit exceeded |
| 54 |
Execution timed out |
1004 ms |
19580 KB |
Time limit exceeded |
| 55 |
Execution timed out |
1055 ms |
19648 KB |
Time limit exceeded |
| 56 |
Execution timed out |
1101 ms |
14208 KB |
Time limit exceeded |
| 57 |
Execution timed out |
1099 ms |
17272 KB |
Time limit exceeded |
| 58 |
Execution timed out |
1101 ms |
17012 KB |
Time limit exceeded |
| 59 |
Execution timed out |
1100 ms |
14368 KB |
Time limit exceeded |
| 60 |
Execution timed out |
1093 ms |
17176 KB |
Time limit exceeded |
| 61 |
Execution timed out |
1096 ms |
17272 KB |
Time limit exceeded |
| 62 |
Execution timed out |
1090 ms |
15316 KB |
Time limit exceeded |
| 63 |
Execution timed out |
1074 ms |
16516 KB |
Time limit exceeded |
| 64 |
Execution timed out |
1089 ms |
17300 KB |
Time limit exceeded |
| 65 |
Execution timed out |
1093 ms |
16880 KB |
Time limit exceeded |
| 66 |
Execution timed out |
1093 ms |
17156 KB |
Time limit exceeded |
| 67 |
Execution timed out |
1101 ms |
17228 KB |
Time limit exceeded |
| 68 |
Execution timed out |
1095 ms |
9568 KB |
Time limit exceeded |
| 69 |
Execution timed out |
1097 ms |
9552 KB |
Time limit exceeded |
| 70 |
Execution timed out |
1094 ms |
9580 KB |
Time limit exceeded |
| 71 |
Execution timed out |
1074 ms |
9480 KB |
Time limit exceeded |
| 72 |
Execution timed out |
1072 ms |
9676 KB |
Time limit exceeded |
| 73 |
Execution timed out |
1092 ms |
13304 KB |
Time limit exceeded |
| 74 |
Execution timed out |
1097 ms |
13304 KB |
Time limit exceeded |
| 75 |
Execution timed out |
1071 ms |
13292 KB |
Time limit exceeded |
| 76 |
Execution timed out |
1045 ms |
13372 KB |
Time limit exceeded |
| 77 |
Execution timed out |
1095 ms |
13292 KB |
Time limit exceeded |
| 78 |
Execution timed out |
1091 ms |
12392 KB |
Time limit exceeded |
| 79 |
Execution timed out |
1075 ms |
12412 KB |
Time limit exceeded |
| 80 |
Execution timed out |
1100 ms |
12256 KB |
Time limit exceeded |
| 81 |
Execution timed out |
1088 ms |
12244 KB |
Time limit exceeded |
| 82 |
Execution timed out |
1097 ms |
12288 KB |
Time limit exceeded |
| 83 |
Execution timed out |
1063 ms |
12296 KB |
Time limit exceeded |
| 84 |
Execution timed out |
1094 ms |
12116 KB |
Time limit exceeded |
| 85 |
Execution timed out |
1096 ms |
12088 KB |
Time limit exceeded |
| 86 |
Execution timed out |
1073 ms |
12108 KB |
Time limit exceeded |
| 87 |
Execution timed out |
1075 ms |
12116 KB |
Time limit exceeded |
| 88 |
Execution timed out |
1097 ms |
11348 KB |
Time limit exceeded |
| 89 |
Execution timed out |
1097 ms |
11348 KB |
Time limit exceeded |
| 90 |
Execution timed out |
1097 ms |
11420 KB |
Time limit exceeded |
| 91 |
Execution timed out |
1086 ms |
11412 KB |
Time limit exceeded |
| 92 |
Execution timed out |
1093 ms |
11340 KB |
Time limit exceeded |
