# |
Submission time |
Handle |
Problem |
Language |
Result |
Execution time |
Memory |
867608 |
2023-10-28T22:33:12 Z |
eysbutno |
Mecho (IOI09_mecho) |
C++11 |
|
140 ms |
6280 KB |
#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define f first
#define s second
const int MAX = 800;
char grid[MAX][MAX];
int n, s, dist[MAX][MAX],
dr[4] = {1, -1, 0, 0},
dc[4] = {0, 0, 1, -1};
pair<int, int> st, ed;
bool check(int mid) {
int trav[n][n];
for (int i = 0; i < n; i++) {
for (int j = 0; j < n; j++) {
trav[i][j] = 2e9;
}
}
trav[st.f][st.s] = mid * s;
queue<pair<int, int>> q;
q.push(st);
while (!q.empty()) {
auto p = q.front(); q.pop();
int r = p.f, c = p.s;
for (int i = 0; i < 4; i++) {
int r1 = r + dr[i], c1 = c + dc[i],
newDist = trav[r][c] + 1;
if (r1 >= 0 && r1 < n && c1 >= 0 && c1 < n
&& newDist < trav[r1][c1] && newDist / s
< dist[r1][c1] && grid[r1][c1] != 'T') {
trav[r1][c1] = newDist;
q.push({r1, c1});
}
}
}
return trav[ed.f][ed.s] != 2e9;
}
int main() {
ios_base::sync_with_stdio(false);
cin.tie(NULL), cout.tie(NULL);
cin >> n >> s;
queue<pair<int, int>> q;
for (int i = 0; i < n; i++) {
for (int j = 0; j < n; j++) {
cin >> grid[i][j];
dist[i][j] = 2e9;
if (grid[i][j] == 'H') {
q.push({i, j});
dist[i][j] = 0;
} else if (grid[i][j] == 'M') {
st = {i, j};
} else if (grid[i][j] == 'D') {
ed = {i, j};
}
}
}
while (!q.empty()) {
auto p = q.front(); q.pop();
int r = p.f, c = p.s;
for (int i = 0; i < 4; i++) {
int r1 = r + dr[i], c1 = c + dc[i];
if (r1 >= 0 && r1 < n && c1 >= 0 && c1 < n
&& dist[r][c] + 1 < dist[r1][c1] &&
grid[r1][c1] != 'T' && grid[r1][c1] != 'D') {
dist[r1][c1] = dist[r][c] + 1;
q.push({r1, c1});
}
}
}
int low = 0, high = dist[st.f][st.s] - 1;
while (low < high) {
int mid = (low + high + 1) / 2;
if (check(mid)) {
low = mid;
} else {
high = mid - 1;
}
}
if (check(low)) cout << low << '\n';
else cout << -1 << '\n';
}
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
0 ms |
348 KB |
Output is correct |
2 |
Correct |
0 ms |
348 KB |
Output is correct |
3 |
Correct |
0 ms |
348 KB |
Output is correct |
4 |
Correct |
0 ms |
348 KB |
Output is correct |
5 |
Correct |
0 ms |
348 KB |
Output is correct |
6 |
Correct |
0 ms |
348 KB |
Output is correct |
7 |
Correct |
62 ms |
6008 KB |
Output is correct |
8 |
Correct |
0 ms |
348 KB |
Output is correct |
9 |
Correct |
0 ms |
348 KB |
Output is correct |
10 |
Correct |
0 ms |
348 KB |
Output is correct |
11 |
Correct |
0 ms |
348 KB |
Output is correct |
12 |
Correct |
1 ms |
2648 KB |
Output is correct |
13 |
Correct |
0 ms |
604 KB |
Output is correct |
14 |
Correct |
1 ms |
2652 KB |
Output is correct |
15 |
Correct |
1 ms |
348 KB |
Output is correct |
16 |
Correct |
0 ms |
348 KB |
Output is correct |
17 |
Correct |
1 ms |
348 KB |
Output is correct |
18 |
Correct |
0 ms |
348 KB |
Output is correct |
19 |
Correct |
0 ms |
344 KB |
Output is correct |
20 |
Correct |
1 ms |
348 KB |
Output is correct |
21 |
Correct |
0 ms |
604 KB |
Output is correct |
22 |
Correct |
1 ms |
604 KB |
Output is correct |
23 |
Correct |
1 ms |
604 KB |
Output is correct |
24 |
Correct |
1 ms |
600 KB |
Output is correct |
25 |
Correct |
1 ms |
2648 KB |
Output is correct |
26 |
Correct |
1 ms |
2648 KB |
Output is correct |
27 |
Correct |
1 ms |
2652 KB |
Output is correct |
28 |
Correct |
1 ms |
2652 KB |
Output is correct |
29 |
Correct |
1 ms |
2652 KB |
Output is correct |
30 |
Correct |
1 ms |
2652 KB |
Output is correct |
31 |
Correct |
1 ms |
2652 KB |
Output is correct |
32 |
Correct |
1 ms |
2652 KB |
Output is correct |
33 |
Correct |
5 ms |
3420 KB |
Output is correct |
34 |
Correct |
5 ms |
3244 KB |
Output is correct |
35 |
Correct |
17 ms |
3416 KB |
Output is correct |
36 |
Correct |
6 ms |
3420 KB |
Output is correct |
37 |
Correct |
7 ms |
3504 KB |
Output is correct |
38 |
Correct |
23 ms |
3420 KB |
Output is correct |
39 |
Correct |
8 ms |
3676 KB |
Output is correct |
40 |
Correct |
8 ms |
3676 KB |
Output is correct |
41 |
Correct |
28 ms |
3676 KB |
Output is correct |
42 |
Correct |
10 ms |
3932 KB |
Output is correct |
43 |
Correct |
10 ms |
4016 KB |
Output is correct |
44 |
Correct |
43 ms |
4056 KB |
Output is correct |
45 |
Correct |
12 ms |
4184 KB |
Output is correct |
46 |
Correct |
12 ms |
4188 KB |
Output is correct |
47 |
Correct |
43 ms |
4188 KB |
Output is correct |
48 |
Correct |
17 ms |
4440 KB |
Output is correct |
49 |
Correct |
14 ms |
4444 KB |
Output is correct |
50 |
Correct |
54 ms |
4552 KB |
Output is correct |
51 |
Correct |
16 ms |
4696 KB |
Output is correct |
52 |
Correct |
16 ms |
4700 KB |
Output is correct |
53 |
Correct |
65 ms |
4700 KB |
Output is correct |
54 |
Correct |
18 ms |
4956 KB |
Output is correct |
55 |
Correct |
19 ms |
4956 KB |
Output is correct |
56 |
Correct |
73 ms |
5144 KB |
Output is correct |
57 |
Correct |
21 ms |
5468 KB |
Output is correct |
58 |
Correct |
22 ms |
5592 KB |
Output is correct |
59 |
Correct |
92 ms |
5580 KB |
Output is correct |
60 |
Correct |
23 ms |
5980 KB |
Output is correct |
61 |
Correct |
24 ms |
6064 KB |
Output is correct |
62 |
Correct |
97 ms |
5980 KB |
Output is correct |
63 |
Correct |
84 ms |
6068 KB |
Output is correct |
64 |
Correct |
140 ms |
5976 KB |
Output is correct |
65 |
Correct |
133 ms |
5976 KB |
Output is correct |
66 |
Correct |
116 ms |
6068 KB |
Output is correct |
67 |
Correct |
98 ms |
6072 KB |
Output is correct |
68 |
Correct |
42 ms |
5908 KB |
Output is correct |
69 |
Correct |
37 ms |
5976 KB |
Output is correct |
70 |
Correct |
34 ms |
5980 KB |
Output is correct |
71 |
Correct |
34 ms |
5972 KB |
Output is correct |
72 |
Correct |
28 ms |
5968 KB |
Output is correct |
73 |
Correct |
27 ms |
6236 KB |
Output is correct |
74 |
Correct |
49 ms |
6236 KB |
Output is correct |
75 |
Correct |
48 ms |
6232 KB |
Output is correct |
76 |
Correct |
47 ms |
6236 KB |
Output is correct |
77 |
Correct |
48 ms |
6164 KB |
Output is correct |
78 |
Correct |
53 ms |
6244 KB |
Output is correct |
79 |
Correct |
54 ms |
6132 KB |
Output is correct |
80 |
Correct |
44 ms |
6232 KB |
Output is correct |
81 |
Correct |
53 ms |
6232 KB |
Output is correct |
82 |
Correct |
49 ms |
6228 KB |
Output is correct |
83 |
Correct |
55 ms |
6280 KB |
Output is correct |
84 |
Correct |
51 ms |
6236 KB |
Output is correct |
85 |
Correct |
59 ms |
6228 KB |
Output is correct |
86 |
Correct |
58 ms |
6236 KB |
Output is correct |
87 |
Correct |
53 ms |
6196 KB |
Output is correct |
88 |
Correct |
56 ms |
6236 KB |
Output is correct |
89 |
Correct |
62 ms |
6236 KB |
Output is correct |
90 |
Correct |
65 ms |
6236 KB |
Output is correct |
91 |
Correct |
71 ms |
6232 KB |
Output is correct |
92 |
Correct |
62 ms |
6236 KB |
Output is correct |