| # |
Submission time |
Handle |
Problem |
Language |
Result |
Execution time |
Memory |
| 1105469 |
2024-10-26T13:14:55 Z |
Zone_zonee |
Mecho (IOI09_mecho) |
C++17 |
|
129 ms |
6480 KB |
#include <bits/stdc++.h>
using namespace std;
int n, s;
char inp[808][808];
int bee[808][808];
int dis[808][808];
const int dr[] = {1, -1, 0, 0}, dc[] = {0, 0, 1, -1};
pair<int, int> st;
bool solve(int mid){
queue<tuple<int, int, int>> q;
q.emplace(st.first, st.second, 0);
for(int i = 1; i <= n; ++i) for(int j = 1; j <= n; ++j) dis[i][j] = (inp[i][j] == 'M' ? 0 : 1e9);
while(!q.empty()){
auto [x, y, d1] = q.front(); q.pop();
if(dis[x][y] < d1 || (dis[x][y] / s >= bee[x][y] - mid && bee[x][y] != -1)) continue;
if(inp[x][y] == 'D') return true;
for(int i = 0; i < 4; ++i){
int nx = x+dr[i];
int ny = y+dc[i];
if(nx <= 0 || nx > n || ny <= 0 || ny > n) continue;
if(inp[nx][ny] != 'T' && dis[nx][ny] > d1 + 1){
q.emplace(nx, ny, dis[nx][ny] = d1+1);
}
}
}
return false;
}
int main(){
ios_base::sync_with_stdio(false);
cin.tie(nullptr);
queue<pair<int, int>> q;
cin >> n >> s;
memset(bee, -1, sizeof bee);
for(int i = 1; i <= n; ++i) for(int j = 1; j <= n; ++j){
cin >> inp[i][j];
if(inp[i][j] == 'M') st = {i, j};
else if(inp[i][j] == 'H'){
q.emplace(i, j);
bee[i][j] = 0;
}
}
while(!q.empty()){
auto [x, y] = q.front(); q.pop();
for(int i = 0; i < 4; ++i){
int nx = x+dr[i];
int ny = y+dc[i];
if(nx <= 0 || nx > n || ny <= 0 || ny > n) continue;
if(inp[nx][ny] == 'D' || inp[nx][ny] == 'T' || bee[nx][ny] != -1) continue;
bee[nx][ny] = bee[x][y] + 1;
q.emplace(nx, ny);
}
}
int l = 0, r = 1e6, ans = -1;
while(l <= r){
int mid = (l+r)>>1;
if(solve(mid)) ans = mid, l = mid+1;
else r = mid-1;
}
cout << ans;
}
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
3152 KB |
Output is correct |
| 2 |
Correct |
2 ms |
3152 KB |
Output is correct |
| 3 |
Correct |
2 ms |
3324 KB |
Output is correct |
| 4 |
Correct |
1 ms |
3152 KB |
Output is correct |
| 5 |
Correct |
2 ms |
3320 KB |
Output is correct |
| 6 |
Correct |
2 ms |
3152 KB |
Output is correct |
| 7 |
Correct |
65 ms |
6224 KB |
Output is correct |
| 8 |
Correct |
2 ms |
3408 KB |
Output is correct |
| 9 |
Correct |
2 ms |
3408 KB |
Output is correct |
| 10 |
Correct |
2 ms |
3408 KB |
Output is correct |
| 11 |
Correct |
2 ms |
3408 KB |
Output is correct |
| 12 |
Correct |
2 ms |
5456 KB |
Output is correct |
| 13 |
Correct |
2 ms |
3408 KB |
Output is correct |
| 14 |
Correct |
2 ms |
5456 KB |
Output is correct |
| 15 |
Correct |
2 ms |
3408 KB |
Output is correct |
| 16 |
Correct |
2 ms |
3576 KB |
Output is correct |
| 17 |
Correct |
2 ms |
3408 KB |
Output is correct |
| 18 |
Correct |
1 ms |
3408 KB |
Output is correct |
| 19 |
Correct |
2 ms |
3576 KB |
Output is correct |
| 20 |
Correct |
1 ms |
3348 KB |
Output is correct |
| 21 |
Correct |
2 ms |
3576 KB |
Output is correct |
| 22 |
Correct |
1 ms |
3408 KB |
Output is correct |
| 23 |
Correct |
2 ms |
3408 KB |
Output is correct |
| 24 |
Correct |
2 ms |
3408 KB |
Output is correct |
| 25 |
Correct |
2 ms |
5456 KB |
Output is correct |
| 26 |
Correct |
2 ms |
5456 KB |
Output is correct |
| 27 |
Correct |
2 ms |
5456 KB |
Output is correct |
| 28 |
Correct |
2 ms |
5456 KB |
Output is correct |
| 29 |
Correct |
2 ms |
5456 KB |
Output is correct |
| 30 |
Correct |
2 ms |
5456 KB |
Output is correct |
| 31 |
Correct |
2 ms |
5456 KB |
Output is correct |
| 32 |
Correct |
2 ms |
5456 KB |
Output is correct |
| 33 |
Correct |
6 ms |
5712 KB |
Output is correct |
| 34 |
Correct |
6 ms |
5712 KB |
Output is correct |
| 35 |
Correct |
13 ms |
5712 KB |
Output is correct |
| 36 |
Correct |
6 ms |
5712 KB |
Output is correct |
| 37 |
Correct |
7 ms |
5712 KB |
Output is correct |
| 38 |
Correct |
18 ms |
5712 KB |
Output is correct |
| 39 |
Correct |
8 ms |
5712 KB |
Output is correct |
| 40 |
Correct |
8 ms |
5712 KB |
Output is correct |
| 41 |
Correct |
24 ms |
5712 KB |
Output is correct |
| 42 |
Correct |
9 ms |
5968 KB |
Output is correct |
| 43 |
Correct |
8 ms |
5968 KB |
Output is correct |
| 44 |
Correct |
28 ms |
6136 KB |
Output is correct |
| 45 |
Correct |
10 ms |
5968 KB |
Output is correct |
| 46 |
Correct |
10 ms |
5988 KB |
Output is correct |
| 47 |
Correct |
35 ms |
5968 KB |
Output is correct |
| 48 |
Correct |
11 ms |
5968 KB |
Output is correct |
| 49 |
Correct |
12 ms |
5968 KB |
Output is correct |
| 50 |
Correct |
38 ms |
6068 KB |
Output is correct |
| 51 |
Correct |
13 ms |
5968 KB |
Output is correct |
| 52 |
Correct |
14 ms |
5968 KB |
Output is correct |
| 53 |
Correct |
49 ms |
5968 KB |
Output is correct |
| 54 |
Correct |
14 ms |
5968 KB |
Output is correct |
| 55 |
Correct |
14 ms |
5968 KB |
Output is correct |
| 56 |
Correct |
55 ms |
5968 KB |
Output is correct |
| 57 |
Correct |
18 ms |
5968 KB |
Output is correct |
| 58 |
Correct |
18 ms |
5980 KB |
Output is correct |
| 59 |
Correct |
63 ms |
5980 KB |
Output is correct |
| 60 |
Correct |
17 ms |
5968 KB |
Output is correct |
| 61 |
Correct |
20 ms |
5968 KB |
Output is correct |
| 62 |
Correct |
77 ms |
5968 KB |
Output is correct |
| 63 |
Correct |
74 ms |
5968 KB |
Output is correct |
| 64 |
Correct |
129 ms |
5968 KB |
Output is correct |
| 65 |
Correct |
101 ms |
5968 KB |
Output is correct |
| 66 |
Correct |
88 ms |
5968 KB |
Output is correct |
| 67 |
Correct |
72 ms |
5968 KB |
Output is correct |
| 68 |
Correct |
39 ms |
6224 KB |
Output is correct |
| 69 |
Correct |
41 ms |
6228 KB |
Output is correct |
| 70 |
Correct |
35 ms |
6224 KB |
Output is correct |
| 71 |
Correct |
32 ms |
6224 KB |
Output is correct |
| 72 |
Correct |
32 ms |
6068 KB |
Output is correct |
| 73 |
Correct |
34 ms |
6276 KB |
Output is correct |
| 74 |
Correct |
45 ms |
6480 KB |
Output is correct |
| 75 |
Correct |
48 ms |
6480 KB |
Output is correct |
| 76 |
Correct |
44 ms |
6480 KB |
Output is correct |
| 77 |
Correct |
49 ms |
6304 KB |
Output is correct |
| 78 |
Correct |
47 ms |
6288 KB |
Output is correct |
| 79 |
Correct |
38 ms |
6224 KB |
Output is correct |
| 80 |
Correct |
42 ms |
6236 KB |
Output is correct |
| 81 |
Correct |
45 ms |
6224 KB |
Output is correct |
| 82 |
Correct |
37 ms |
6224 KB |
Output is correct |
| 83 |
Correct |
53 ms |
6224 KB |
Output is correct |
| 84 |
Correct |
47 ms |
6236 KB |
Output is correct |
| 85 |
Correct |
47 ms |
6416 KB |
Output is correct |
| 86 |
Correct |
56 ms |
6216 KB |
Output is correct |
| 87 |
Correct |
49 ms |
6224 KB |
Output is correct |
| 88 |
Correct |
52 ms |
6396 KB |
Output is correct |
| 89 |
Correct |
52 ms |
6224 KB |
Output is correct |
| 90 |
Correct |
54 ms |
6224 KB |
Output is correct |
| 91 |
Correct |
57 ms |
6224 KB |
Output is correct |
| 92 |
Correct |
56 ms |
6392 KB |
Output is correct |
