| # |
Submission time |
Handle |
Problem |
Language |
Result |
Execution time |
Memory |
| 337423 |
2020-12-20T16:59:41 Z |
arbor |
Mecho (IOI09_mecho) |
C++17 |
|
183 ms |
7020 KB |
#include <bits/stdc++.h>
#define all(x) x.begin(), x.end()
using namespace std;
using ll = long long;
using pii = pair<int, int>;
const int MN = 805;
int N, S, dx[] = {1, -1, 0, 0}, dy[] = {0, 0, 1, -1};
char a[MN][MN];
int bee[MN][MN], dis[MN][MN];
int sx, sy, ex, ey;
bool good(int t) {
if (t >= bee[sx][sy]) return false;
memset(dis, 0x3f, sizeof(dis));
dis[sx][sy] = t + 1;
queue<pair<pii, int>> q;
q.push({{sx, sy}, S});
while (!q.empty()) {
auto [p, s] = q.front(); q.pop();
auto [x, y] = p;
if (!s && dis[x][y] >= bee[x][y]) continue;
for (int k = 0; k < 4; k++) {
int nx = x + dx[k], ny = y + dy[k];
if (nx < 1 || nx > N || ny < 1 || ny > N || a[nx][ny] == 'T') continue;
if (!s) {
int nd = dis[x][y] + 1;
if (dis[nx][ny] > nd && nd <= bee[nx][ny]) {
dis[nx][ny] = nd;
q.push({{nx, ny}, S - 1});
}
} else {
int nd = dis[x][y];
if (dis[nx][ny] > nd && nd <= bee[nx][ny]) {
dis[nx][ny] = nd;
q.push({{nx, ny}, s - 1});
}
}
}
}
return dis[ex][ey] < 1e9;
}
int main() {
ios_base::sync_with_stdio(0), cin.tie(0);
cin >> N >> S;
queue<pii> q;
for (int i = 1; i <= N; i++)
for (int j = 1; j <= N; j++) {
cin >> a[i][j];
bee[i][j] = 1e9;
if (a[i][j] == 'M') sx = i, sy = j;
if (a[i][j] == 'D') ex = i, ey = j;
if (a[i][j] == 'H') q.emplace(i, j), bee[i][j] = 0;
}
while (!q.empty()) {
auto [x, y] = q.front(); q.pop();
for (int k = 0; k < 4; k++) {
int nx = x + dx[k], ny = y + dy[k];
if (nx < 1 || nx > N || ny < 1 || ny > N || a[nx][ny] == 'T' || a[nx][ny] == 'D') continue;
if (bee[nx][ny] > bee[x][y] + 1) bee[nx][ny] = bee[x][y] + 1, q.emplace(nx, ny);
}
}
int l = 0, r = 5e5;
while (l < r) {
int m = (l + r) / 2;
if (!good(m)) r = m;
else l = m + 1;
}
cout << l - 1 << '\n';
return 0;
}
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
2 ms |
2924 KB |
Output is correct |
| 2 |
Correct |
2 ms |
2924 KB |
Output is correct |
| 3 |
Correct |
3 ms |
2940 KB |
Output is correct |
| 4 |
Correct |
2 ms |
2924 KB |
Output is correct |
| 5 |
Correct |
2 ms |
2924 KB |
Output is correct |
| 6 |
Correct |
2 ms |
2924 KB |
Output is correct |
| 7 |
Correct |
104 ms |
6764 KB |
Output is correct |
| 8 |
Correct |
2 ms |
2924 KB |
Output is correct |
| 9 |
Correct |
2 ms |
2924 KB |
Output is correct |
| 10 |
Correct |
2 ms |
2944 KB |
Output is correct |
| 11 |
Correct |
2 ms |
2924 KB |
Output is correct |
| 12 |
Correct |
3 ms |
3180 KB |
Output is correct |
| 13 |
Correct |
2 ms |
3052 KB |
Output is correct |
| 14 |
Correct |
3 ms |
3180 KB |
Output is correct |
| 15 |
Correct |
2 ms |
2924 KB |
Output is correct |
| 16 |
Correct |
2 ms |
2924 KB |
Output is correct |
| 17 |
Correct |
2 ms |
2924 KB |
Output is correct |
| 18 |
Correct |
2 ms |
2924 KB |
Output is correct |
| 19 |
Correct |
2 ms |
3052 KB |
Output is correct |
| 20 |
Correct |
2 ms |
3052 KB |
Output is correct |
| 21 |
Correct |
2 ms |
3052 KB |
Output is correct |
| 22 |
Correct |
3 ms |
3072 KB |
Output is correct |
| 23 |
Correct |
3 ms |
3052 KB |
Output is correct |
| 24 |
Correct |
2 ms |
3052 KB |
Output is correct |
| 25 |
Correct |
3 ms |
3180 KB |
Output is correct |
| 26 |
Correct |
3 ms |
3180 KB |
Output is correct |
| 27 |
Correct |
3 ms |
3180 KB |
Output is correct |
| 28 |
Correct |
3 ms |
3180 KB |
Output is correct |
| 29 |
Correct |
3 ms |
3200 KB |
Output is correct |
| 30 |
Correct |
3 ms |
3180 KB |
Output is correct |
| 31 |
Correct |
3 ms |
3180 KB |
Output is correct |
| 32 |
Correct |
3 ms |
3212 KB |
Output is correct |
| 33 |
Correct |
8 ms |
4332 KB |
Output is correct |
| 34 |
Correct |
8 ms |
4332 KB |
Output is correct |
| 35 |
Correct |
29 ms |
4332 KB |
Output is correct |
| 36 |
Correct |
9 ms |
4588 KB |
Output is correct |
| 37 |
Correct |
9 ms |
4588 KB |
Output is correct |
| 38 |
Correct |
36 ms |
4588 KB |
Output is correct |
| 39 |
Correct |
11 ms |
4844 KB |
Output is correct |
| 40 |
Correct |
11 ms |
4844 KB |
Output is correct |
| 41 |
Correct |
46 ms |
4844 KB |
Output is correct |
| 42 |
Correct |
13 ms |
5100 KB |
Output is correct |
| 43 |
Correct |
15 ms |
5228 KB |
Output is correct |
| 44 |
Correct |
59 ms |
5100 KB |
Output is correct |
| 45 |
Correct |
13 ms |
5356 KB |
Output is correct |
| 46 |
Correct |
15 ms |
5356 KB |
Output is correct |
| 47 |
Correct |
72 ms |
5356 KB |
Output is correct |
| 48 |
Correct |
16 ms |
5612 KB |
Output is correct |
| 49 |
Correct |
18 ms |
5740 KB |
Output is correct |
| 50 |
Correct |
86 ms |
5612 KB |
Output is correct |
| 51 |
Correct |
18 ms |
5868 KB |
Output is correct |
| 52 |
Correct |
23 ms |
5868 KB |
Output is correct |
| 53 |
Correct |
101 ms |
5868 KB |
Output is correct |
| 54 |
Correct |
22 ms |
6124 KB |
Output is correct |
| 55 |
Correct |
24 ms |
6124 KB |
Output is correct |
| 56 |
Correct |
116 ms |
6124 KB |
Output is correct |
| 57 |
Correct |
22 ms |
6380 KB |
Output is correct |
| 58 |
Correct |
22 ms |
6380 KB |
Output is correct |
| 59 |
Correct |
137 ms |
6400 KB |
Output is correct |
| 60 |
Correct |
26 ms |
6636 KB |
Output is correct |
| 61 |
Correct |
32 ms |
6636 KB |
Output is correct |
| 62 |
Correct |
158 ms |
6636 KB |
Output is correct |
| 63 |
Correct |
125 ms |
6636 KB |
Output is correct |
| 64 |
Correct |
183 ms |
6636 KB |
Output is correct |
| 65 |
Correct |
176 ms |
6636 KB |
Output is correct |
| 66 |
Correct |
161 ms |
6636 KB |
Output is correct |
| 67 |
Correct |
138 ms |
6656 KB |
Output is correct |
| 68 |
Correct |
59 ms |
6764 KB |
Output is correct |
| 69 |
Correct |
59 ms |
6764 KB |
Output is correct |
| 70 |
Correct |
50 ms |
6764 KB |
Output is correct |
| 71 |
Correct |
42 ms |
6764 KB |
Output is correct |
| 72 |
Correct |
40 ms |
6764 KB |
Output is correct |
| 73 |
Correct |
43 ms |
7020 KB |
Output is correct |
| 74 |
Correct |
78 ms |
6892 KB |
Output is correct |
| 75 |
Correct |
85 ms |
6892 KB |
Output is correct |
| 76 |
Correct |
76 ms |
6892 KB |
Output is correct |
| 77 |
Correct |
83 ms |
6912 KB |
Output is correct |
| 78 |
Correct |
94 ms |
7020 KB |
Output is correct |
| 79 |
Correct |
71 ms |
6892 KB |
Output is correct |
| 80 |
Correct |
75 ms |
6892 KB |
Output is correct |
| 81 |
Correct |
85 ms |
6892 KB |
Output is correct |
| 82 |
Correct |
74 ms |
6892 KB |
Output is correct |
| 83 |
Correct |
102 ms |
7020 KB |
Output is correct |
| 84 |
Correct |
81 ms |
6892 KB |
Output is correct |
| 85 |
Correct |
92 ms |
6892 KB |
Output is correct |
| 86 |
Correct |
95 ms |
6904 KB |
Output is correct |
| 87 |
Correct |
94 ms |
6892 KB |
Output is correct |
| 88 |
Correct |
99 ms |
6892 KB |
Output is correct |
| 89 |
Correct |
98 ms |
6892 KB |
Output is correct |
| 90 |
Correct |
103 ms |
6892 KB |
Output is correct |
| 91 |
Correct |
103 ms |
7020 KB |
Output is correct |
| 92 |
Correct |
98 ms |
6764 KB |
Output is correct |
