| # |
Submission time |
Handle |
Problem |
Language |
Result |
Execution time |
Memory |
| 393323 |
2021-04-23T07:54:40 Z |
ngpin04 |
Mecho (IOI09_mecho) |
C++14 |
|
704 ms |
6404 KB |
#include <bits/stdc++.h>
#define fi first
#define se second
#define mp make_pair
using namespace std;
const int N = 805;
const int oo = 1e9;
const int dx[] = {1, 0, -1, 0}, dy[] = {0, 1, 0, -1};
char a[N][N];
pair <int, int> s,t;
int bee[N][N];
int dis[N][N];
int n,d;
bool ok(int i, int j) {
return a[i][j] != 'T' && min(i, j) > 0 && max(i, j) <= n;
}
bool solve(int x, queue <pair <int, int>> q) {
for (int i = 1; i <= n; i++)
for (int j = 1; j <= n; j++) {
if (a[i][j] != 'H')
bee[i][j] = oo;
if (a[i][j] != 'M')
dis[i][j] = oo;
}
int fir = -1;
while (q.size()) {
int i = q.front().fi;
int j = q.front().se;
if (fir < 0)
fir = bee[i][j];
if (bee[i][j] - fir == x)
break;
q.pop();
for (int dir = 0; dir < 4; dir++) {
int u = i + dx[dir];
int v = j + dy[dir];
if (ok(u, v) && bee[u][v] == oo && a[u][v] != 'D') {
bee[u][v] = bee[i][j] + 1;
q.push(mp(u, v));
}
}
}
if (bee[s.fi][s.se] < oo)
return false;
queue <pair <int, int>> qq;
qq.push(s);
while (qq.size()) {
fir = -1;
while (qq.size()) {
int i = qq.front().fi;
int j = qq.front().se;
if (fir < 0)
fir = dis[i][j];
if (dis[i][j] - fir == d)
break;
qq.pop();
if (mp(i, j) == t)
return true;
if (bee[i][j] < oo)
continue;
for (int dir = 0; dir < 4; dir++) {
int u = i + dx[dir];
int v = j + dy[dir];
if (ok(u, v) && bee[u][v] == oo && dis[u][v] == oo) {
dis[u][v] = dis[i][j] + 1;
qq.push(mp(u, v));
}
}
}
fir = -1;
while (q.size()) {
int i = q.front().fi;
int j = q.front().se;
if (fir < 0)
fir = bee[i][j];
if (bee[i][j] - fir == 1)
break;
q.pop();
for (int dir = 0; dir < 4; dir++) {
int u = i + dx[dir];
int v = j + dy[dir];
if (ok(u, v) && bee[u][v] == oo && a[u][v] != 'D') {
bee[u][v] = bee[i][j] + 1;
q.push(mp(u, v));
}
}
}
}
return false;
}
int main() {
ios_base::sync_with_stdio(0);
cin.tie(0);
cin >> n >> d;
queue <pair <int, int>> q;
for (int i = 1; i <= n; i++)
for (int j = 1; j <= n; j++) {
cin >> a[i][j];
if (a[i][j] == 'H')
q.push(mp(i, j));
if (a[i][j] == 'M')
s = mp(i, j);
if (a[i][j] == 'D')
t = mp(i, j);
}
int lo = -1;
int hi = 1e9;
while (hi - lo > 1) {
int mid = (lo + hi) >> 1;
if (solve(mid, q))
lo = mid;
else
hi = mid;
}
cout << lo;
return 0;
}
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
332 KB |
Output is correct |
| 2 |
Correct |
1 ms |
332 KB |
Output is correct |
| 3 |
Correct |
1 ms |
332 KB |
Output is correct |
| 4 |
Correct |
1 ms |
332 KB |
Output is correct |
| 5 |
Correct |
1 ms |
332 KB |
Output is correct |
| 6 |
Correct |
1 ms |
332 KB |
Output is correct |
| 7 |
Correct |
685 ms |
6224 KB |
Output is correct |
| 8 |
Correct |
1 ms |
332 KB |
Output is correct |
| 9 |
Correct |
1 ms |
332 KB |
Output is correct |
| 10 |
Correct |
1 ms |
332 KB |
Output is correct |
| 11 |
Correct |
1 ms |
332 KB |
Output is correct |
| 12 |
Correct |
2 ms |
716 KB |
Output is correct |
| 13 |
Correct |
3 ms |
588 KB |
Output is correct |
| 14 |
Correct |
4 ms |
716 KB |
Output is correct |
| 15 |
Correct |
1 ms |
460 KB |
Output is correct |
| 16 |
Correct |
1 ms |
460 KB |
Output is correct |
| 17 |
Correct |
1 ms |
460 KB |
Output is correct |
| 18 |
Correct |
1 ms |
460 KB |
Output is correct |
| 19 |
Correct |
1 ms |
460 KB |
Output is correct |
| 20 |
Correct |
1 ms |
460 KB |
Output is correct |
| 21 |
Correct |
1 ms |
588 KB |
Output is correct |
| 22 |
Correct |
1 ms |
588 KB |
Output is correct |
| 23 |
Correct |
2 ms |
588 KB |
Output is correct |
| 24 |
Correct |
2 ms |
588 KB |
Output is correct |
| 25 |
Correct |
2 ms |
716 KB |
Output is correct |
| 26 |
Correct |
2 ms |
716 KB |
Output is correct |
| 27 |
Correct |
2 ms |
716 KB |
Output is correct |
| 28 |
Correct |
2 ms |
716 KB |
Output is correct |
| 29 |
Correct |
3 ms |
716 KB |
Output is correct |
| 30 |
Correct |
3 ms |
716 KB |
Output is correct |
| 31 |
Correct |
3 ms |
844 KB |
Output is correct |
| 32 |
Correct |
4 ms |
844 KB |
Output is correct |
| 33 |
Correct |
56 ms |
2800 KB |
Output is correct |
| 34 |
Correct |
47 ms |
2884 KB |
Output is correct |
| 35 |
Correct |
83 ms |
2764 KB |
Output is correct |
| 36 |
Correct |
65 ms |
3148 KB |
Output is correct |
| 37 |
Correct |
61 ms |
3168 KB |
Output is correct |
| 38 |
Correct |
105 ms |
3148 KB |
Output is correct |
| 39 |
Correct |
81 ms |
3504 KB |
Output is correct |
| 40 |
Correct |
77 ms |
3404 KB |
Output is correct |
| 41 |
Correct |
135 ms |
3552 KB |
Output is correct |
| 42 |
Correct |
111 ms |
3788 KB |
Output is correct |
| 43 |
Correct |
94 ms |
3788 KB |
Output is correct |
| 44 |
Correct |
177 ms |
3916 KB |
Output is correct |
| 45 |
Correct |
123 ms |
4292 KB |
Output is correct |
| 46 |
Correct |
111 ms |
4172 KB |
Output is correct |
| 47 |
Correct |
204 ms |
4172 KB |
Output is correct |
| 48 |
Correct |
145 ms |
4564 KB |
Output is correct |
| 49 |
Correct |
135 ms |
4576 KB |
Output is correct |
| 50 |
Correct |
241 ms |
4572 KB |
Output is correct |
| 51 |
Correct |
169 ms |
4812 KB |
Output is correct |
| 52 |
Correct |
156 ms |
4920 KB |
Output is correct |
| 53 |
Correct |
281 ms |
4940 KB |
Output is correct |
| 54 |
Correct |
231 ms |
5196 KB |
Output is correct |
| 55 |
Correct |
178 ms |
5196 KB |
Output is correct |
| 56 |
Correct |
370 ms |
5196 KB |
Output is correct |
| 57 |
Correct |
226 ms |
5584 KB |
Output is correct |
| 58 |
Correct |
241 ms |
5624 KB |
Output is correct |
| 59 |
Correct |
382 ms |
5704 KB |
Output is correct |
| 60 |
Correct |
253 ms |
5976 KB |
Output is correct |
| 61 |
Correct |
237 ms |
5980 KB |
Output is correct |
| 62 |
Correct |
439 ms |
5988 KB |
Output is correct |
| 63 |
Correct |
527 ms |
6084 KB |
Output is correct |
| 64 |
Correct |
539 ms |
5992 KB |
Output is correct |
| 65 |
Correct |
548 ms |
5964 KB |
Output is correct |
| 66 |
Correct |
562 ms |
5964 KB |
Output is correct |
| 67 |
Correct |
534 ms |
5984 KB |
Output is correct |
| 68 |
Correct |
593 ms |
6012 KB |
Output is correct |
| 69 |
Correct |
584 ms |
5976 KB |
Output is correct |
| 70 |
Correct |
541 ms |
6024 KB |
Output is correct |
| 71 |
Correct |
555 ms |
6016 KB |
Output is correct |
| 72 |
Correct |
632 ms |
6016 KB |
Output is correct |
| 73 |
Correct |
605 ms |
6404 KB |
Output is correct |
| 74 |
Correct |
655 ms |
6284 KB |
Output is correct |
| 75 |
Correct |
661 ms |
6288 KB |
Output is correct |
| 76 |
Correct |
667 ms |
6340 KB |
Output is correct |
| 77 |
Correct |
666 ms |
6284 KB |
Output is correct |
| 78 |
Correct |
655 ms |
6252 KB |
Output is correct |
| 79 |
Correct |
671 ms |
6276 KB |
Output is correct |
| 80 |
Correct |
665 ms |
6256 KB |
Output is correct |
| 81 |
Correct |
673 ms |
6256 KB |
Output is correct |
| 82 |
Correct |
661 ms |
6248 KB |
Output is correct |
| 83 |
Correct |
704 ms |
6220 KB |
Output is correct |
| 84 |
Correct |
656 ms |
6220 KB |
Output is correct |
| 85 |
Correct |
655 ms |
6220 KB |
Output is correct |
| 86 |
Correct |
683 ms |
6220 KB |
Output is correct |
| 87 |
Correct |
665 ms |
6224 KB |
Output is correct |
| 88 |
Correct |
676 ms |
6212 KB |
Output is correct |
| 89 |
Correct |
640 ms |
6156 KB |
Output is correct |
| 90 |
Correct |
643 ms |
6156 KB |
Output is correct |
| 91 |
Correct |
676 ms |
6156 KB |
Output is correct |
| 92 |
Correct |
655 ms |
6172 KB |
Output is correct |
