| # |
Submission time |
Handle |
Problem |
Language |
Result |
Execution time |
Memory |
| 608717 |
2022-07-27T09:37:06 Z |
Mazaalai |
Mecho (IOI09_mecho) |
C++17 |
|
278 ms |
5752 KB |
#include <bits/stdc++.h>
#define pb push_back
#define mp make_pair
#define ff first
#define ss second
#define LINE "---------------\n"
#define sz(a) (int)a.size()
using namespace std;
using PII = pair <int, int>;
const int N = 805;
const int dx[] = {1, -1, 0, 0};
const int dy[] = {0, 0, 1, -1};
int n, m, X1, Y1, X2, Y2;
vector <PII> hives;
int mat[N][N], maze[N][N];
bool check(int lim) {
memcpy(maze, mat, sizeof(mat));
queue <PII> bfs1, bfs2;
for (auto& [a, b] : hives) bfs2.push({a, b});
for (int i = 0; i < lim; i++) {
int rep = sz(bfs2);
for (int j = 0; j < rep; j++) {
int x, y; tie(x, y) = bfs2.front(); bfs2.pop();
for (int a = 0; a < 4; a++) {
int xx = dx[a] + x;
int yy = dy[a] + y;
if (xx < 1 || xx > n || yy < 1 || yy > n || maze[xx][yy] == 1) continue;
maze[xx][yy] = 1;
bfs2.push({xx, yy});
}
}
}
// cout << LINE;
// for (int i = 1; i <= n; i++)
// for (int j = 1; j <= n; j++) cout << maze[i][j] << " \n"[j==n];
mat[X1][Y1] = 2;
bfs1.push({X1, Y1});
while (maze[X2][Y2] == 0) {
// move bear
for (int i = 0; i < m; i++) {
int rep = sz(bfs1);
for (int j = 0; j < rep; j++) {
int x, y; tie(x, y) = bfs1.front(); bfs1.pop();
if (maze[x][y] == 1) continue;
for (int a = 0; a < 4; a++) {
int xx = dx[a] + x;
int yy = dy[a] + y;
if (xx < 1 || xx > n || yy < 1 || yy > n || maze[xx][yy] != 0) continue;
maze[xx][yy] = 2;
bfs1.push({xx, yy});
}
}
}
// cout << LINE;
// cout << LINE;
// for (int i = 1; i <= n; i++)
// for (int j = 1; j <= n; j++) cout << maze[i][j] << " \n"[j==n];
if (maze[X2][Y2] != 0) return 1;
// spread bees
int rep = sz(bfs2);
for (int j = 0; j < rep; j++) {
int x, y; tie(x, y) = bfs2.front(); bfs2.pop();
for (int a = 0; a < 4; a++) {
int xx = dx[a] + x;
int yy = dy[a] + y;
if (xx < 1 || xx > n || yy < 1 || yy > n || maze[xx][yy] == 1) continue;
maze[xx][yy] = 1;
bfs2.push({xx, yy});
}
}
// cout << LINE;
// for (int i = 1; i <= n; i++)
// for (int j = 1; j <= n; j++) cout << maze[i][j] << " \n"[j==n];
}
return 0;
}
signed main() {
ios::sync_with_stdio(0);cin.tie(0);cout.tie(0);
// freopen("0.in", "r", stdin);
// freopen("0.out", "w", stdout);
cin >> n >> m;
for (int i = 1; i <= n; i++)
for (int j = 1; j <= n; j++) {
char x; cin >> x;
if (x == 'T') { // tree
mat[i][j] = 1;
} else if (x == 'G') { // grass
mat[i][j] = 0;
} else if (x == 'M') { // mecho the bear
tie(X1, Y1) = mp(i, j);
mat[i][j] = 0;
} else if (x == 'D') { // home of the mecho
mat[i][j] = 0;
tie(X2, Y2) = mp(i, j);
} else if (x == 'H') { // bee hive
mat[i][j] = 1;
hives.pb({i, j});
}
}
int l = 0, r = n*n / 2, ans = -1;
while (l <= r) {
int m = (l+r)>>1;
if (check(m)) {
l = m+1;
ans = m;
} else {
r = m-1;
}
}
cout << ans << "\n";
}
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
2 ms |
2772 KB |
Output is correct |
| 2 |
Incorrect |
2 ms |
2860 KB |
Output isn't correct |
| 3 |
Correct |
2 ms |
2772 KB |
Output is correct |
| 4 |
Incorrect |
2 ms |
2772 KB |
Output isn't correct |
| 5 |
Correct |
2 ms |
2772 KB |
Output is correct |
| 6 |
Incorrect |
3 ms |
2772 KB |
Output isn't correct |
| 7 |
Incorrect |
227 ms |
5496 KB |
Output isn't correct |
| 8 |
Correct |
2 ms |
2900 KB |
Output is correct |
| 9 |
Correct |
2 ms |
2900 KB |
Output is correct |
| 10 |
Correct |
2 ms |
2900 KB |
Output is correct |
| 11 |
Correct |
2 ms |
2900 KB |
Output is correct |
| 12 |
Incorrect |
3 ms |
3008 KB |
Output isn't correct |
| 13 |
Correct |
3 ms |
3028 KB |
Output is correct |
| 14 |
Correct |
3 ms |
3028 KB |
Output is correct |
| 15 |
Correct |
2 ms |
2900 KB |
Output is correct |
| 16 |
Correct |
2 ms |
2900 KB |
Output is correct |
| 17 |
Correct |
2 ms |
2900 KB |
Output is correct |
| 18 |
Correct |
2 ms |
2900 KB |
Output is correct |
| 19 |
Correct |
3 ms |
2900 KB |
Output is correct |
| 20 |
Correct |
2 ms |
2900 KB |
Output is correct |
| 21 |
Correct |
2 ms |
2900 KB |
Output is correct |
| 22 |
Correct |
3 ms |
2900 KB |
Output is correct |
| 23 |
Correct |
3 ms |
3028 KB |
Output is correct |
| 24 |
Correct |
3 ms |
2900 KB |
Output is correct |
| 25 |
Correct |
3 ms |
3028 KB |
Output is correct |
| 26 |
Correct |
3 ms |
3028 KB |
Output is correct |
| 27 |
Correct |
3 ms |
3028 KB |
Output is correct |
| 28 |
Correct |
3 ms |
3076 KB |
Output is correct |
| 29 |
Correct |
3 ms |
3028 KB |
Output is correct |
| 30 |
Correct |
3 ms |
3028 KB |
Output is correct |
| 31 |
Correct |
3 ms |
3028 KB |
Output is correct |
| 32 |
Correct |
3 ms |
3028 KB |
Output is correct |
| 33 |
Correct |
22 ms |
3924 KB |
Output is correct |
| 34 |
Correct |
19 ms |
3924 KB |
Output is correct |
| 35 |
Correct |
22 ms |
3968 KB |
Output is correct |
| 36 |
Correct |
30 ms |
4104 KB |
Output is correct |
| 37 |
Correct |
27 ms |
4128 KB |
Output is correct |
| 38 |
Correct |
28 ms |
4132 KB |
Output is correct |
| 39 |
Correct |
37 ms |
4264 KB |
Output is correct |
| 40 |
Correct |
35 ms |
4180 KB |
Output is correct |
| 41 |
Correct |
38 ms |
4180 KB |
Output is correct |
| 42 |
Correct |
46 ms |
4424 KB |
Output is correct |
| 43 |
Correct |
41 ms |
4436 KB |
Output is correct |
| 44 |
Correct |
44 ms |
4436 KB |
Output is correct |
| 45 |
Correct |
54 ms |
4572 KB |
Output is correct |
| 46 |
Correct |
54 ms |
4580 KB |
Output is correct |
| 47 |
Correct |
52 ms |
4592 KB |
Output is correct |
| 48 |
Correct |
63 ms |
4692 KB |
Output is correct |
| 49 |
Correct |
57 ms |
4692 KB |
Output is correct |
| 50 |
Correct |
61 ms |
4812 KB |
Output is correct |
| 51 |
Correct |
74 ms |
4896 KB |
Output is correct |
| 52 |
Correct |
71 ms |
4820 KB |
Output is correct |
| 53 |
Correct |
79 ms |
4912 KB |
Output is correct |
| 54 |
Correct |
95 ms |
5056 KB |
Output is correct |
| 55 |
Correct |
85 ms |
5052 KB |
Output is correct |
| 56 |
Correct |
99 ms |
5076 KB |
Output is correct |
| 57 |
Correct |
102 ms |
5204 KB |
Output is correct |
| 58 |
Correct |
95 ms |
5324 KB |
Output is correct |
| 59 |
Correct |
105 ms |
5224 KB |
Output is correct |
| 60 |
Correct |
117 ms |
5364 KB |
Output is correct |
| 61 |
Correct |
104 ms |
5384 KB |
Output is correct |
| 62 |
Correct |
109 ms |
5388 KB |
Output is correct |
| 63 |
Correct |
255 ms |
5372 KB |
Output is correct |
| 64 |
Correct |
248 ms |
5332 KB |
Output is correct |
| 65 |
Correct |
243 ms |
5332 KB |
Output is correct |
| 66 |
Correct |
248 ms |
5376 KB |
Output is correct |
| 67 |
Correct |
256 ms |
5376 KB |
Output is correct |
| 68 |
Correct |
238 ms |
5472 KB |
Output is correct |
| 69 |
Correct |
214 ms |
5416 KB |
Output is correct |
| 70 |
Correct |
222 ms |
5396 KB |
Output is correct |
| 71 |
Correct |
232 ms |
5404 KB |
Output is correct |
| 72 |
Correct |
232 ms |
5452 KB |
Output is correct |
| 73 |
Correct |
249 ms |
5680 KB |
Output is correct |
| 74 |
Correct |
247 ms |
5588 KB |
Output is correct |
| 75 |
Correct |
250 ms |
5752 KB |
Output is correct |
| 76 |
Correct |
233 ms |
5588 KB |
Output is correct |
| 77 |
Correct |
229 ms |
5676 KB |
Output is correct |
| 78 |
Correct |
227 ms |
5588 KB |
Output is correct |
| 79 |
Correct |
236 ms |
5644 KB |
Output is correct |
| 80 |
Correct |
246 ms |
5728 KB |
Output is correct |
| 81 |
Correct |
247 ms |
5640 KB |
Output is correct |
| 82 |
Correct |
245 ms |
5588 KB |
Output is correct |
| 83 |
Correct |
234 ms |
5596 KB |
Output is correct |
| 84 |
Correct |
235 ms |
5708 KB |
Output is correct |
| 85 |
Correct |
258 ms |
5612 KB |
Output is correct |
| 86 |
Correct |
278 ms |
5672 KB |
Output is correct |
| 87 |
Correct |
255 ms |
5488 KB |
Output is correct |
| 88 |
Correct |
232 ms |
5580 KB |
Output is correct |
| 89 |
Correct |
223 ms |
5560 KB |
Output is correct |
| 90 |
Correct |
220 ms |
5460 KB |
Output is correct |
| 91 |
Correct |
228 ms |
5468 KB |
Output is correct |
| 92 |
Correct |
254 ms |
5540 KB |
Output is correct |
