| # |
Submission time |
Handle |
Problem |
Language |
Result |
Execution time |
Memory |
| 1057790 |
2024-08-14T06:09:54 Z |
12345678 |
Mecho (IOI09_mecho) |
C++17 |
|
108 ms |
6324 KB |
#include <bits/stdc++.h>
using namespace std;
const int nx=805;
int n, s, mn[nx][nx], dx[4]={1, 0, 0, -1}, dy[4]={0, 1, -1, 0}, dp[nx][nx], f;
char mp[nx][nx];
pair<int, int> st, tg;
queue<pair<int, int>> q;
int main()
{
cin.tie(NULL)->sync_with_stdio(false);
cin>>n>>s;
for (int i=1; i<=n; i++) for (int j=1; j<=n; j++) cin>>mp[i][j], mn[i][j]=1e9;
for (int i=1; i<=n; i++) for (int j=1; j<=n; j++) if (mp[i][j]=='M') st={i, j};
for (int i=1; i<=n; i++) for (int j=1; j<=n; j++) if (mp[i][j]=='H') q.push({i, j}), mn[i][j]=0;
for (int i=1; i<=n; i++) for (int j=1; j<=n; j++) if (mp[i][j]=='D') tg={i, j};
while (!q.empty())
{
auto [x, y]=q.front();
q.pop();
for (int i=0; i<4; i++)
{
int cx=x+dx[i], cy=y+dy[i];
if (cx<1||cx>n||cy<1||cy>n||mp[cx][cy]=='T'||mp[cx][cy]=='D') continue;
if (mn[cx][cy]>mn[x][y]+1) mn[cx][cy]=mn[x][y]+1, q.push({cx, cy});
}
}
//cout<<"debug mn "<<mn[st.first][st.second]<<'\n';
int l=0, r=n*n;
while (l<r||r==0)
{
int md=(l+r+1)/2;
for (int i=1; i<=n; i++) for (int j=1; j<=n; j++) dp[i][j]=1e9;
if (mn[st.first][st.second]<=md)
{
r=md-1;
continue;
}
dp[st.first][st.second]=0;
q.push({st.first, st.second});
//cout<<"here "<<md<<'\n';
while (!q.empty())
{
auto [x, y]=q.front();
q.pop();
for (int i=0; i<4; i++)
{
int cx=x+dx[i], cy=y+dy[i];
if (cx<1||cx>n||cy<1||cy>n||mp[cx][cy]=='T'||mp[cx][cy]=='H') continue;
if ((dp[cx][cy]>dp[x][y]+1&&(md+(dp[x][y]+1)/s)<mn[cx][cy])||(cx==tg.first&&cy==tg.second)) dp[cx][cy]=dp[x][y]+1, q.push({cx, cy});
}
}
if (r==0)
{
if (dp[tg.first][tg.second]!=1e9) f=0;
else f=1;
break;
}
else
{
if (dp[tg.first][tg.second]!=1e9) l=md;
else r=md-1;
}
}
if (f) cout<<-1;
else cout<<l;
}
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
4444 KB |
Output is correct |
| 2 |
Correct |
1 ms |
4444 KB |
Output is correct |
| 3 |
Correct |
1 ms |
4444 KB |
Output is correct |
| 4 |
Correct |
1 ms |
4444 KB |
Output is correct |
| 5 |
Correct |
1 ms |
4452 KB |
Output is correct |
| 6 |
Correct |
0 ms |
4444 KB |
Output is correct |
| 7 |
Correct |
45 ms |
6248 KB |
Output is correct |
| 8 |
Correct |
1 ms |
4440 KB |
Output is correct |
| 9 |
Correct |
0 ms |
4444 KB |
Output is correct |
| 10 |
Correct |
1 ms |
4444 KB |
Output is correct |
| 11 |
Correct |
1 ms |
4444 KB |
Output is correct |
| 12 |
Correct |
0 ms |
4444 KB |
Output is correct |
| 13 |
Correct |
1 ms |
4444 KB |
Output is correct |
| 14 |
Correct |
1 ms |
4444 KB |
Output is correct |
| 15 |
Correct |
0 ms |
4444 KB |
Output is correct |
| 16 |
Correct |
0 ms |
4444 KB |
Output is correct |
| 17 |
Correct |
0 ms |
4444 KB |
Output is correct |
| 18 |
Correct |
0 ms |
4444 KB |
Output is correct |
| 19 |
Correct |
1 ms |
4444 KB |
Output is correct |
| 20 |
Correct |
0 ms |
4444 KB |
Output is correct |
| 21 |
Correct |
0 ms |
4444 KB |
Output is correct |
| 22 |
Correct |
0 ms |
4444 KB |
Output is correct |
| 23 |
Correct |
1 ms |
4444 KB |
Output is correct |
| 24 |
Correct |
1 ms |
4444 KB |
Output is correct |
| 25 |
Correct |
1 ms |
4444 KB |
Output is correct |
| 26 |
Correct |
1 ms |
4440 KB |
Output is correct |
| 27 |
Correct |
1 ms |
4444 KB |
Output is correct |
| 28 |
Correct |
0 ms |
4444 KB |
Output is correct |
| 29 |
Correct |
0 ms |
4444 KB |
Output is correct |
| 30 |
Correct |
0 ms |
4444 KB |
Output is correct |
| 31 |
Correct |
1 ms |
4444 KB |
Output is correct |
| 32 |
Correct |
1 ms |
4560 KB |
Output is correct |
| 33 |
Correct |
3 ms |
4700 KB |
Output is correct |
| 34 |
Correct |
3 ms |
4700 KB |
Output is correct |
| 35 |
Correct |
12 ms |
4744 KB |
Output is correct |
| 36 |
Correct |
6 ms |
4700 KB |
Output is correct |
| 37 |
Correct |
4 ms |
4900 KB |
Output is correct |
| 38 |
Correct |
15 ms |
4700 KB |
Output is correct |
| 39 |
Correct |
7 ms |
4956 KB |
Output is correct |
| 40 |
Correct |
5 ms |
4956 KB |
Output is correct |
| 41 |
Correct |
20 ms |
5052 KB |
Output is correct |
| 42 |
Correct |
7 ms |
5212 KB |
Output is correct |
| 43 |
Correct |
7 ms |
5212 KB |
Output is correct |
| 44 |
Correct |
24 ms |
5220 KB |
Output is correct |
| 45 |
Correct |
8 ms |
5212 KB |
Output is correct |
| 46 |
Correct |
8 ms |
5212 KB |
Output is correct |
| 47 |
Correct |
28 ms |
5212 KB |
Output is correct |
| 48 |
Correct |
9 ms |
5468 KB |
Output is correct |
| 49 |
Correct |
10 ms |
5468 KB |
Output is correct |
| 50 |
Correct |
36 ms |
5524 KB |
Output is correct |
| 51 |
Correct |
11 ms |
5468 KB |
Output is correct |
| 52 |
Correct |
11 ms |
5468 KB |
Output is correct |
| 53 |
Correct |
42 ms |
5464 KB |
Output is correct |
| 54 |
Correct |
12 ms |
5720 KB |
Output is correct |
| 55 |
Correct |
12 ms |
5724 KB |
Output is correct |
| 56 |
Correct |
57 ms |
5832 KB |
Output is correct |
| 57 |
Correct |
13 ms |
6000 KB |
Output is correct |
| 58 |
Correct |
15 ms |
5992 KB |
Output is correct |
| 59 |
Correct |
65 ms |
5820 KB |
Output is correct |
| 60 |
Correct |
15 ms |
5980 KB |
Output is correct |
| 61 |
Correct |
16 ms |
5980 KB |
Output is correct |
| 62 |
Correct |
70 ms |
5980 KB |
Output is correct |
| 63 |
Correct |
75 ms |
5980 KB |
Output is correct |
| 64 |
Correct |
108 ms |
6136 KB |
Output is correct |
| 65 |
Correct |
80 ms |
5976 KB |
Output is correct |
| 66 |
Correct |
69 ms |
5976 KB |
Output is correct |
| 67 |
Correct |
72 ms |
6136 KB |
Output is correct |
| 68 |
Correct |
35 ms |
5976 KB |
Output is correct |
| 69 |
Correct |
29 ms |
5980 KB |
Output is correct |
| 70 |
Correct |
28 ms |
5980 KB |
Output is correct |
| 71 |
Correct |
26 ms |
6064 KB |
Output is correct |
| 72 |
Correct |
22 ms |
5980 KB |
Output is correct |
| 73 |
Correct |
21 ms |
6232 KB |
Output is correct |
| 74 |
Correct |
32 ms |
6232 KB |
Output is correct |
| 75 |
Correct |
39 ms |
6196 KB |
Output is correct |
| 76 |
Correct |
37 ms |
6232 KB |
Output is correct |
| 77 |
Correct |
39 ms |
6236 KB |
Output is correct |
| 78 |
Correct |
45 ms |
6236 KB |
Output is correct |
| 79 |
Correct |
30 ms |
6236 KB |
Output is correct |
| 80 |
Correct |
34 ms |
6232 KB |
Output is correct |
| 81 |
Correct |
39 ms |
6236 KB |
Output is correct |
| 82 |
Correct |
34 ms |
6236 KB |
Output is correct |
| 83 |
Correct |
54 ms |
6236 KB |
Output is correct |
| 84 |
Correct |
41 ms |
6232 KB |
Output is correct |
| 85 |
Correct |
42 ms |
6132 KB |
Output is correct |
| 86 |
Correct |
44 ms |
6228 KB |
Output is correct |
| 87 |
Correct |
41 ms |
6236 KB |
Output is correct |
| 88 |
Correct |
49 ms |
6232 KB |
Output is correct |
| 89 |
Correct |
46 ms |
6324 KB |
Output is correct |
| 90 |
Correct |
49 ms |
6160 KB |
Output is correct |
| 91 |
Correct |
45 ms |
6236 KB |
Output is correct |
| 92 |
Correct |
43 ms |
6296 KB |
Output is correct |
