#include <iostream>
#include <vector>
#include <algorithm>
#include <queue>
using namespace std;
int iini, ifin, jini, jfin, n, s;
bool way_home(int m, vector<vector<int> >&bemoment, vector<vector<char> >&grid){
queue<pair<int,int> >mecho;
vector<vector<pair<int,int> > >mechomoment(n, vector<pair<int,int> >(n, make_pair(1e9, 0)));
mecho.push(make_pair(iini, jini));
mechomoment[iini][jini]=make_pair(m, 1);
while (!mecho.empty()){
int i=mecho.front().first;
int j=mecho.front().second;
mecho.pop();
int minut=mechomoment[i][j].first, steps=mechomoment[i][j].second;
if (steps==s){
minut++;
steps=0;
}steps++;
if ((i!=0 && grid[i-1][j]=='D')||(j!=0 && grid[i][j-1]=='D')||(i!=n-1 && grid[i+1][j]=='D')||((j!=n-1 && grid[i][j+1]=='D'))){
return true;
}
if (i!=0 and bemoment[i-1][j]>minut and mechomoment[i-1][j].first==1e9){
mechomoment[i-1][j]=make_pair(minut, steps);
mecho.push(make_pair(i-1, j));
}if (j!=0 and bemoment[i][j-1]>minut and mechomoment[i][j-1].first==1e9){
mechomoment[i][j-1]=make_pair(minut, steps);
mecho.push(make_pair(i, j-1));
}if (i!=n-1 and bemoment[i+1][j]>minut and mechomoment[i+1][j].first==1e9){
mechomoment[i+1][j]=make_pair(minut, steps);
mecho.push(make_pair(i+1, j));
}if (j!=n-1 and bemoment[i][j+1]>minut and mechomoment[i][j+1].first==1e9){
mechomoment[i][j+1]=make_pair(minut, steps);
mecho.push(make_pair(i, j+1));
}
}return false;
}
int main(){
cin>>n>>s;
vector<vector<char> >grid(n, vector<char>(n));
vector<vector<int> >bemoment(n, vector<int>(n, 1e9));
queue<pair<int,int> >grassy;
for (int i=0; i<n; i++){
for (int j=0; j<n; j++){
cin>>grid[i][j];
if (grid[i][j]=='H'){
grassy.push(make_pair(i, j));
bemoment[i][j]=0;
}else if (grid[i][j]=='M'){
iini=i;
jini=j;
}else if (grid[i][j]=='D'){
ifin=i;
jfin=j;
bemoment[i][j]=-1;
}else if (grid[i][j]=='T') bemoment[i][j]=-1;
}
}while (!grassy.empty()){
int i=grassy.front().first;
int j=grassy.front().second;
grassy.pop();
if (i!=0 and bemoment[i-1][j]==1e9){
bemoment[i-1][j]=bemoment[i][j]+1;
grassy.push(make_pair(i-1, j));
}if (j!=0 and bemoment[i][j-1]==1e9){
bemoment[i][j-1]=bemoment[i][j]+1;
grassy.push(make_pair(i, j-1));
}if (i!=n-1 and bemoment[i+1][j]==1e9){
bemoment[i+1][j]=bemoment[i][j]+1;
grassy.push(make_pair(i+1, j));
}if (j!=n-1 and bemoment[i][j+1]==1e9){
bemoment[i][j+1]=bemoment[i][j]+1;
grassy.push(make_pair(i, j+1));
}
}int ans=-1;
int l=0, r=bemoment[iini][ifin]-1, m;
while (l<=r){
m=(r-l)/2+l;
if (l+1==r){
if (way_home(r, bemoment, grid)){
ans=r;
l+=2;
}else if (way_home(l, bemoment, grid)){
ans=l;
r-=2;
}else ans=-1;
break;
}else if (l==r){
if (way_home(r, bemoment, grid)){
ans=r;
l++;
}else ans=-1;
break;
}
if (way_home(m, bemoment, grid)) l=m;
else r=m-1;
}cout<<ans<<'\n';
return 0;
}
| # |
결과 |
실행 시간 |
메모리 |
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 |
344 KB |
Output is correct |
| 5 |
Incorrect |
0 ms |
348 KB |
Output isn't correct |
| 6 |
Correct |
0 ms |
436 KB |
Output is correct |
| 7 |
Correct |
93 ms |
9168 KB |
Output is correct |
| 8 |
Correct |
1 ms |
344 KB |
Output is correct |
| 9 |
Incorrect |
0 ms |
348 KB |
Output isn't correct |
| 10 |
Incorrect |
1 ms |
344 KB |
Output isn't correct |
| 11 |
Incorrect |
1 ms |
344 KB |
Output isn't correct |
| 12 |
Correct |
0 ms |
348 KB |
Output is correct |
| 13 |
Incorrect |
0 ms |
348 KB |
Output isn't correct |
| 14 |
Correct |
1 ms |
348 KB |
Output is correct |
| 15 |
Incorrect |
1 ms |
540 KB |
Output isn't correct |
| 16 |
Correct |
1 ms |
348 KB |
Output is correct |
| 17 |
Incorrect |
0 ms |
348 KB |
Output isn't correct |
| 18 |
Correct |
0 ms |
348 KB |
Output is correct |
| 19 |
Incorrect |
1 ms |
348 KB |
Output isn't correct |
| 20 |
Correct |
0 ms |
348 KB |
Output is correct |
| 21 |
Incorrect |
0 ms |
436 KB |
Output isn't correct |
| 22 |
Correct |
0 ms |
348 KB |
Output is correct |
| 23 |
Incorrect |
1 ms |
348 KB |
Output isn't correct |
| 24 |
Correct |
1 ms |
600 KB |
Output is correct |
| 25 |
Incorrect |
1 ms |
348 KB |
Output isn't correct |
| 26 |
Correct |
1 ms |
348 KB |
Output is correct |
| 27 |
Incorrect |
1 ms |
348 KB |
Output isn't correct |
| 28 |
Correct |
1 ms |
348 KB |
Output is correct |
| 29 |
Incorrect |
1 ms |
444 KB |
Output isn't correct |
| 30 |
Correct |
1 ms |
348 KB |
Output is correct |
| 31 |
Incorrect |
1 ms |
436 KB |
Output isn't correct |
| 32 |
Correct |
1 ms |
348 KB |
Output is correct |
| 33 |
Incorrect |
5 ms |
1116 KB |
Output isn't correct |
| 34 |
Correct |
10 ms |
2184 KB |
Output is correct |
| 35 |
Correct |
18 ms |
2168 KB |
Output is correct |
| 36 |
Incorrect |
9 ms |
1372 KB |
Output isn't correct |
| 37 |
Correct |
13 ms |
2720 KB |
Output is correct |
| 38 |
Correct |
24 ms |
2672 KB |
Output is correct |
| 39 |
Incorrect |
9 ms |
1628 KB |
Output isn't correct |
| 40 |
Correct |
17 ms |
3224 KB |
Output is correct |
| 41 |
Correct |
34 ms |
3268 KB |
Output is correct |
| 42 |
Incorrect |
11 ms |
1884 KB |
Output isn't correct |
| 43 |
Correct |
20 ms |
3972 KB |
Output is correct |
| 44 |
Correct |
43 ms |
3916 KB |
Output is correct |
| 45 |
Incorrect |
13 ms |
2140 KB |
Output isn't correct |
| 46 |
Correct |
26 ms |
4636 KB |
Output is correct |
| 47 |
Correct |
49 ms |
4640 KB |
Output is correct |
| 48 |
Incorrect |
15 ms |
2396 KB |
Output isn't correct |
| 49 |
Correct |
29 ms |
5536 KB |
Output is correct |
| 50 |
Correct |
54 ms |
5416 KB |
Output is correct |
| 51 |
Incorrect |
18 ms |
3104 KB |
Output isn't correct |
| 52 |
Correct |
34 ms |
6328 KB |
Output is correct |
| 53 |
Correct |
91 ms |
6268 KB |
Output is correct |
| 54 |
Incorrect |
21 ms |
3164 KB |
Output isn't correct |
| 55 |
Correct |
40 ms |
7316 KB |
Output is correct |
| 56 |
Correct |
82 ms |
7472 KB |
Output is correct |
| 57 |
Incorrect |
25 ms |
3676 KB |
Output isn't correct |
| 58 |
Correct |
47 ms |
8340 KB |
Output is correct |
| 59 |
Correct |
103 ms |
8232 KB |
Output is correct |
| 60 |
Incorrect |
27 ms |
4068 KB |
Output isn't correct |
| 61 |
Correct |
53 ms |
9336 KB |
Output is correct |
| 62 |
Correct |
104 ms |
9296 KB |
Output is correct |
| 63 |
Correct |
121 ms |
9288 KB |
Output is correct |
| 64 |
Correct |
186 ms |
9572 KB |
Output is correct |
| 65 |
Correct |
185 ms |
9288 KB |
Output is correct |
| 66 |
Correct |
144 ms |
9300 KB |
Output is correct |
| 67 |
Correct |
124 ms |
9288 KB |
Output is correct |
| 68 |
Incorrect |
34 ms |
4028 KB |
Output isn't correct |
| 69 |
Incorrect |
41 ms |
4600 KB |
Output isn't correct |
| 70 |
Incorrect |
34 ms |
3960 KB |
Output isn't correct |
| 71 |
Incorrect |
36 ms |
4132 KB |
Output isn't correct |
| 72 |
Incorrect |
56 ms |
9296 KB |
Output isn't correct |
| 73 |
Incorrect |
32 ms |
4188 KB |
Output isn't correct |
| 74 |
Incorrect |
31 ms |
4184 KB |
Output isn't correct |
| 75 |
Incorrect |
31 ms |
4188 KB |
Output isn't correct |
| 76 |
Incorrect |
33 ms |
4176 KB |
Output isn't correct |
| 77 |
Incorrect |
35 ms |
4176 KB |
Output isn't correct |
| 78 |
Correct |
80 ms |
9352 KB |
Output is correct |
| 79 |
Correct |
63 ms |
9364 KB |
Output is correct |
| 80 |
Correct |
69 ms |
9564 KB |
Output is correct |
| 81 |
Correct |
76 ms |
9328 KB |
Output is correct |
| 82 |
Correct |
65 ms |
9304 KB |
Output is correct |
| 83 |
Correct |
95 ms |
9332 KB |
Output is correct |
| 84 |
Correct |
74 ms |
9352 KB |
Output is correct |
| 85 |
Correct |
70 ms |
9352 KB |
Output is correct |
| 86 |
Correct |
77 ms |
9432 KB |
Output is correct |
| 87 |
Correct |
100 ms |
9360 KB |
Output is correct |
| 88 |
Correct |
84 ms |
9336 KB |
Output is correct |
| 89 |
Correct |
89 ms |
9340 KB |
Output is correct |
| 90 |
Correct |
102 ms |
9636 KB |
Output is correct |
| 91 |
Correct |
85 ms |
9296 KB |
Output is correct |
| 92 |
Correct |
85 ms |
9580 KB |
Output is correct |
