# |
Submission time |
Handle |
Problem |
Language |
Result |
Execution time |
Memory |
1020302 |
2024-07-11T20:27:20 Z |
niwrad |
Mecho (IOI09_mecho) |
C++17 |
|
146 ms |
8732 KB |
#include <bits/stdc++.h>
using namespace std;
int r_c[]{0, 1, 0, -1};
int c_c[]{1, 0, -1, 0};
int n, s;
vector<vector<int>> arr;
int r_s, c_s;
int r_f, c_f;
queue<pair<int, int>> hives;
vector<vector<int>> dis;
void fill() {
while (hives.size() != 0) {
pair<int, int> t = hives.front();
for (int i = 0; i < 4; i++) {
int n_r = t.first + r_c[i];
int n_c = t.second + c_c[i];
if (min(n_r, n_c) >= 0 && max(n_r, n_c) < n) {
if (arr[n_r][n_c] == 0 && dis[n_r][n_c] == -1) {
dis[n_r][n_c] = dis[t.first][t.second] + 1;
hives.push({n_r, n_c});
}
}
}
hives.pop();
}
}
bool check(int time) {
vector<vector<int>> len(n, vector<int>(n));
queue<pair<int, int>> q;
q.push({r_s, c_s});
while (q.size() != 0) {
pair<int, int> t = q.front();
for (int i = 0; i < 4; i++) {
int n_r = t.first + r_c[i];
int n_c = t.second + c_c[i];
if (min(n_r, n_c) >= 0 && max(n_r, n_c) < n) {
if (arr[n_r][n_c] != -1 && len[n_r][n_c] == 0) {
if (dis[n_r][n_c] == -1 || (1 + len[t.first][t.second]) / s + time < dis[n_r][n_c]) {
len[n_r][n_c] = 1 + len[t.first][t.second];
q.push({n_r, n_c});
}
}
}
}
q.pop();
}
if (len[r_f][c_f] != 0) {
return true;
} else {
return false;
}
}
int main() {
ios::sync_with_stdio(false);
cin.tie(nullptr);
cin >> n >> s;
arr.resize(n, vector<int>(n));
dis.resize(n, vector<int>(n, -1));
for (int i = 0; i < n; i++) {
for (int j = 0; j < n; j++) {
char c;
cin >> c;
if (c == 'T') {
arr[i][j] = -1;
} else if (c == 'M') {
r_s = i; c_s = j;
} else if (c == 'D') {
arr[i][j] = 1;
r_f = i; c_f = j;
} else if (c == 'H') {
dis[i][j] = 0;
hives.push({i, j});
}
}
}
fill();
if (!check(0)) {
cout << "-1\n";
} else {
int l = 0;
int r = dis[r_s][c_s];
while (r > l + 1) {
int m = (l + r) / 2;
if (check(m)) {
l = m;
} else {
r = m;
}
}
cout << l << "\n";
}
}
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1 ms |
344 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 |
64 ms |
8704 KB |
Output is correct |
8 |
Correct |
0 ms |
348 KB |
Output is correct |
9 |
Correct |
0 ms |
348 KB |
Output is correct |
10 |
Correct |
1 ms |
344 KB |
Output is correct |
11 |
Correct |
0 ms |
348 KB |
Output is correct |
12 |
Correct |
0 ms |
348 KB |
Output is correct |
13 |
Correct |
0 ms |
348 KB |
Output is correct |
14 |
Correct |
0 ms |
348 KB |
Output is correct |
15 |
Correct |
0 ms |
348 KB |
Output is correct |
16 |
Correct |
0 ms |
348 KB |
Output is correct |
17 |
Correct |
0 ms |
348 KB |
Output is correct |
18 |
Correct |
1 ms |
352 KB |
Output is correct |
19 |
Correct |
0 ms |
348 KB |
Output is correct |
20 |
Correct |
0 ms |
348 KB |
Output is correct |
21 |
Correct |
0 ms |
348 KB |
Output is correct |
22 |
Correct |
0 ms |
348 KB |
Output is correct |
23 |
Correct |
0 ms |
348 KB |
Output is correct |
24 |
Correct |
0 ms |
484 KB |
Output is correct |
25 |
Correct |
1 ms |
348 KB |
Output is correct |
26 |
Correct |
1 ms |
348 KB |
Output is correct |
27 |
Correct |
0 ms |
348 KB |
Output is correct |
28 |
Correct |
1 ms |
348 KB |
Output is correct |
29 |
Correct |
1 ms |
348 KB |
Output is correct |
30 |
Correct |
1 ms |
348 KB |
Output is correct |
31 |
Correct |
1 ms |
348 KB |
Output is correct |
32 |
Correct |
1 ms |
348 KB |
Output is correct |
33 |
Correct |
6 ms |
2056 KB |
Output is correct |
34 |
Correct |
6 ms |
2044 KB |
Output is correct |
35 |
Correct |
19 ms |
2044 KB |
Output is correct |
36 |
Correct |
8 ms |
2392 KB |
Output is correct |
37 |
Correct |
8 ms |
2544 KB |
Output is correct |
38 |
Correct |
22 ms |
2396 KB |
Output is correct |
39 |
Correct |
11 ms |
3032 KB |
Output is correct |
40 |
Correct |
13 ms |
3368 KB |
Output is correct |
41 |
Correct |
28 ms |
3100 KB |
Output is correct |
42 |
Correct |
13 ms |
3712 KB |
Output is correct |
43 |
Correct |
13 ms |
3736 KB |
Output is correct |
44 |
Correct |
35 ms |
3860 KB |
Output is correct |
45 |
Correct |
15 ms |
4348 KB |
Output is correct |
46 |
Correct |
16 ms |
4348 KB |
Output is correct |
47 |
Correct |
42 ms |
4372 KB |
Output is correct |
48 |
Correct |
18 ms |
5152 KB |
Output is correct |
49 |
Correct |
19 ms |
5124 KB |
Output is correct |
50 |
Correct |
47 ms |
5116 KB |
Output is correct |
51 |
Correct |
21 ms |
5884 KB |
Output is correct |
52 |
Correct |
22 ms |
5792 KB |
Output is correct |
53 |
Correct |
61 ms |
5872 KB |
Output is correct |
54 |
Correct |
24 ms |
6816 KB |
Output is correct |
55 |
Correct |
25 ms |
6816 KB |
Output is correct |
56 |
Correct |
71 ms |
6756 KB |
Output is correct |
57 |
Correct |
28 ms |
7716 KB |
Output is correct |
58 |
Correct |
29 ms |
7716 KB |
Output is correct |
59 |
Correct |
87 ms |
7668 KB |
Output is correct |
60 |
Correct |
32 ms |
8728 KB |
Output is correct |
61 |
Correct |
33 ms |
8724 KB |
Output is correct |
62 |
Correct |
97 ms |
8680 KB |
Output is correct |
63 |
Correct |
95 ms |
8692 KB |
Output is correct |
64 |
Correct |
146 ms |
8700 KB |
Output is correct |
65 |
Correct |
144 ms |
8700 KB |
Output is correct |
66 |
Correct |
123 ms |
8668 KB |
Output is correct |
67 |
Correct |
31 ms |
8468 KB |
Output is correct |
68 |
Correct |
49 ms |
8720 KB |
Output is correct |
69 |
Correct |
45 ms |
8700 KB |
Output is correct |
70 |
Correct |
46 ms |
8716 KB |
Output is correct |
71 |
Correct |
40 ms |
8692 KB |
Output is correct |
72 |
Correct |
40 ms |
8720 KB |
Output is correct |
73 |
Correct |
30 ms |
8584 KB |
Output is correct |
74 |
Correct |
83 ms |
8704 KB |
Output is correct |
75 |
Correct |
56 ms |
8724 KB |
Output is correct |
76 |
Correct |
53 ms |
8712 KB |
Output is correct |
77 |
Correct |
58 ms |
8712 KB |
Output is correct |
78 |
Correct |
24 ms |
8452 KB |
Output is correct |
79 |
Correct |
58 ms |
8664 KB |
Output is correct |
80 |
Correct |
50 ms |
8716 KB |
Output is correct |
81 |
Correct |
62 ms |
8732 KB |
Output is correct |
82 |
Correct |
55 ms |
8696 KB |
Output is correct |
83 |
Correct |
59 ms |
8720 KB |
Output is correct |
84 |
Correct |
62 ms |
8684 KB |
Output is correct |
85 |
Correct |
58 ms |
8700 KB |
Output is correct |
86 |
Correct |
65 ms |
8700 KB |
Output is correct |
87 |
Correct |
59 ms |
8704 KB |
Output is correct |
88 |
Correct |
78 ms |
8716 KB |
Output is correct |
89 |
Correct |
70 ms |
8680 KB |
Output is correct |
90 |
Correct |
72 ms |
8700 KB |
Output is correct |
91 |
Correct |
69 ms |
8684 KB |
Output is correct |
92 |
Correct |
72 ms |
8724 KB |
Output is correct |