| # |
Submission time |
Handle |
Problem |
Language |
Result |
Execution time |
Memory |
| 977572 |
2024-05-08T07:10:13 Z |
farica |
Mecho (IOI09_mecho) |
C++14 |
|
174 ms |
6860 KB |
#include <bits/stdc++.h>
#define int long long
using namespace std;
const int MAX_N = 4e5 + 5;
int n, s, dist[805][805], sx, sy, ex, ey;
string grid[805];
bool test(int m) {
queue<pair<int, pair<int,int>>>q;
q.push({0, {sx, sy}});
vector<vector<bool>>visited(n, vector<bool>(n, 0));
while(!q.empty()) {
int cnt = q.front().first, x = q.front().second.first, y = q.front().second.second;
q.pop();
if(visited[x][y]) continue;
visited[x][y] = 1;
++cnt;
int cost = cnt / s + (cnt % s > 0 ? 1 : 0) + m;
if(x && dist[x-1][y] >= cost && grid[x-1][y] == 'G') q.push({cnt, {x-1, y}});
if(y && dist[x][y-1] >= cost && grid[x][y-1] == 'G') q.push({cnt, {x, y-1}});
if(x+1<n && dist[x+1][y] >= cost && grid[x+1][y] == 'G') q.push({cnt, {x+1, y}});
if(y+1<n && dist[x][y+1] >= cost && grid[x][y+1] == 'G') q.push({cnt, {x, y+1}});
}
if(ex && visited[ex-1][ey]) return true;
if(ey && visited[ex][ey-1]) return true;
if(ex+1<n && visited[ex+1][ey]) return true;
if(ey+1<n && visited[ex][ey+1]) return true;
return false;
}
void solve() {
cin >> n >> s;
queue<pair<int,int>>q;
for(int i=0; i<n; ++i) {
cin >> grid[i];
for(int j=0; j<n; ++j) {
dist[i][j] = -1;
if(grid[i][j] == 'H') {
q.push({i, j});
dist[i][j] = 0;
} else if(grid[i][j] == 'M') sx=i, sy=j;
else if(grid[i][j] == 'D') ex=i, ey=j;
}
}
while(!q.empty()) {
int i = q.front().first, j = q.front().second;
q.pop();
if(i && dist[i-1][j] == -1 && grid[i-1][j] != 'T' && grid[i-1][j] != 'D') {
dist[i-1][j] = dist[i][j] + 1;
q.push({i-1, j});
}
if(j && dist[i][j-1] == -1 && grid[i][j-1] != 'T' && grid[i][j-1] != 'D') {
dist[i][j-1] = dist[i][j] + 1;
q.push({i, j-1});
}
if(i<n-1 && dist[i+1][j] == -1 && grid[i+1][j] != 'T' && grid[i+1][j] != 'D') {
dist[i+1][j] = dist[i][j] + 1;
q.push({i+1, j});
}
if(j<n-1 && dist[i][j+1] == -1 && grid[i][j+1] != 'T' && grid[i][j+1] != 'D') {
dist[i][j+1] = dist[i][j] + 1;
q.push({i, j+1});
}
}
if(!test(0)) {
cout << -1 << endl;
return;
}
int l=0, r=dist[sx][sy]-1, mid;
while(l<=r) {
mid = (l+r)/2;
if(test(mid)) l = mid + 1;
else r = mid - 1;
}
cout << l - 1 << endl;
}
signed main()
{
ios::sync_with_stdio(false);
cin.tie(0);
cout.tie(0);
int t = 1;
while(t--) solve();
return 0;
}
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
1 ms |
344 KB |
Output isn't correct |
| 2 |
Incorrect |
0 ms |
348 KB |
Output isn't correct |
| 3 |
Incorrect |
1 ms |
348 KB |
Output isn't correct |
| 4 |
Incorrect |
0 ms |
344 KB |
Output isn't correct |
| 5 |
Correct |
0 ms |
348 KB |
Output is correct |
| 6 |
Correct |
0 ms |
348 KB |
Output is correct |
| 7 |
Correct |
133 ms |
6488 KB |
Output is correct |
| 8 |
Incorrect |
1 ms |
344 KB |
Output isn't correct |
| 9 |
Correct |
1 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 |
2652 KB |
Output is correct |
| 13 |
Correct |
1 ms |
2652 KB |
Output is correct |
| 14 |
Correct |
1 ms |
2652 KB |
Output is correct |
| 15 |
Incorrect |
0 ms |
348 KB |
Output isn't correct |
| 16 |
Correct |
0 ms |
596 KB |
Output is correct |
| 17 |
Incorrect |
1 ms |
2396 KB |
Output isn't correct |
| 18 |
Correct |
1 ms |
2396 KB |
Output is correct |
| 19 |
Incorrect |
1 ms |
2396 KB |
Output isn't correct |
| 20 |
Correct |
1 ms |
2396 KB |
Output is correct |
| 21 |
Incorrect |
1 ms |
2396 KB |
Output isn't correct |
| 22 |
Correct |
1 ms |
2396 KB |
Output is correct |
| 23 |
Incorrect |
1 ms |
2652 KB |
Output isn't correct |
| 24 |
Correct |
1 ms |
2392 KB |
Output is correct |
| 25 |
Incorrect |
1 ms |
2652 KB |
Output isn't correct |
| 26 |
Correct |
1 ms |
2652 KB |
Output is correct |
| 27 |
Incorrect |
1 ms |
2652 KB |
Output isn't correct |
| 28 |
Correct |
1 ms |
2652 KB |
Output is correct |
| 29 |
Incorrect |
1 ms |
2652 KB |
Output isn't correct |
| 30 |
Correct |
1 ms |
2652 KB |
Output is correct |
| 31 |
Incorrect |
1 ms |
2648 KB |
Output isn't correct |
| 32 |
Correct |
1 ms |
2652 KB |
Output is correct |
| 33 |
Incorrect |
4 ms |
4700 KB |
Output isn't correct |
| 34 |
Correct |
5 ms |
4700 KB |
Output is correct |
| 35 |
Correct |
27 ms |
4928 KB |
Output is correct |
| 36 |
Incorrect |
6 ms |
4700 KB |
Output isn't correct |
| 37 |
Correct |
6 ms |
4700 KB |
Output is correct |
| 38 |
Correct |
38 ms |
4972 KB |
Output is correct |
| 39 |
Incorrect |
6 ms |
4952 KB |
Output isn't correct |
| 40 |
Correct |
8 ms |
4956 KB |
Output is correct |
| 41 |
Correct |
48 ms |
5152 KB |
Output is correct |
| 42 |
Incorrect |
8 ms |
4956 KB |
Output isn't correct |
| 43 |
Correct |
9 ms |
5056 KB |
Output is correct |
| 44 |
Correct |
60 ms |
4956 KB |
Output is correct |
| 45 |
Incorrect |
10 ms |
4952 KB |
Output isn't correct |
| 46 |
Correct |
11 ms |
4956 KB |
Output is correct |
| 47 |
Correct |
72 ms |
4956 KB |
Output is correct |
| 48 |
Incorrect |
10 ms |
4956 KB |
Output isn't correct |
| 49 |
Correct |
12 ms |
4956 KB |
Output is correct |
| 50 |
Correct |
86 ms |
5136 KB |
Output is correct |
| 51 |
Incorrect |
11 ms |
5208 KB |
Output isn't correct |
| 52 |
Correct |
14 ms |
5212 KB |
Output is correct |
| 53 |
Correct |
100 ms |
5284 KB |
Output is correct |
| 54 |
Incorrect |
15 ms |
5468 KB |
Output isn't correct |
| 55 |
Correct |
16 ms |
5468 KB |
Output is correct |
| 56 |
Correct |
116 ms |
5468 KB |
Output is correct |
| 57 |
Incorrect |
15 ms |
5724 KB |
Output isn't correct |
| 58 |
Correct |
20 ms |
5916 KB |
Output is correct |
| 59 |
Correct |
136 ms |
5724 KB |
Output is correct |
| 60 |
Incorrect |
17 ms |
6236 KB |
Output isn't correct |
| 61 |
Correct |
21 ms |
6188 KB |
Output is correct |
| 62 |
Correct |
174 ms |
6336 KB |
Output is correct |
| 63 |
Correct |
101 ms |
6320 KB |
Output is correct |
| 64 |
Correct |
163 ms |
6308 KB |
Output is correct |
| 65 |
Correct |
158 ms |
6236 KB |
Output is correct |
| 66 |
Incorrect |
119 ms |
6312 KB |
Output isn't correct |
| 67 |
Correct |
25 ms |
6236 KB |
Output is correct |
| 68 |
Correct |
37 ms |
6236 KB |
Output is correct |
| 69 |
Correct |
33 ms |
6232 KB |
Output is correct |
| 70 |
Correct |
28 ms |
6236 KB |
Output is correct |
| 71 |
Correct |
22 ms |
6260 KB |
Output is correct |
| 72 |
Correct |
25 ms |
6256 KB |
Output is correct |
| 73 |
Correct |
44 ms |
6748 KB |
Output is correct |
| 74 |
Correct |
98 ms |
6748 KB |
Output is correct |
| 75 |
Correct |
80 ms |
6748 KB |
Output is correct |
| 76 |
Correct |
80 ms |
6748 KB |
Output is correct |
| 77 |
Correct |
88 ms |
6748 KB |
Output is correct |
| 78 |
Correct |
22 ms |
6488 KB |
Output is correct |
| 79 |
Correct |
87 ms |
6488 KB |
Output is correct |
| 80 |
Correct |
92 ms |
6744 KB |
Output is correct |
| 81 |
Correct |
96 ms |
6688 KB |
Output is correct |
| 82 |
Correct |
80 ms |
6488 KB |
Output is correct |
| 83 |
Correct |
109 ms |
6488 KB |
Output is correct |
| 84 |
Correct |
102 ms |
6600 KB |
Output is correct |
| 85 |
Correct |
91 ms |
6492 KB |
Output is correct |
| 86 |
Correct |
106 ms |
6592 KB |
Output is correct |
| 87 |
Correct |
94 ms |
6860 KB |
Output is correct |
| 88 |
Correct |
114 ms |
6492 KB |
Output is correct |
| 89 |
Correct |
128 ms |
6504 KB |
Output is correct |
| 90 |
Correct |
122 ms |
6496 KB |
Output is correct |
| 91 |
Correct |
125 ms |
6492 KB |
Output is correct |
| 92 |
Correct |
119 ms |
6500 KB |
Output is correct |
