| # |
Submission time |
Handle |
Problem |
Language |
Result |
Execution time |
Memory |
| 978616 |
2024-05-09T11:31:47 Z |
Bodisha |
Mecho (IOI09_mecho) |
C++17 |
|
1000 ms |
8132 KB |
#include <bits/stdc++.h>
#define MAX_N 801
using namespace std;
int n, s;
char grid[MAX_N][MAX_N];
bool visited[MAX_N][MAX_N];
int beed[MAX_N][MAX_N];
int steps[MAX_N][MAX_N];
bool check(int t) {
pair<int, int> mecho_pos, home_pos;
for(int i = 0; i < n; i++) {
for(int j = 0; j < n; j++) {
visited[i][j] = false;
if(grid[i][j] == 'M') {
mecho_pos = {i, j};
}
if(grid[i][j] == 'D') {
home_pos = {i, j};
}
}
}
if(t + 1 > beed[mecho_pos.first][mecho_pos.second]) {
return false;
}
queue<pair<pair<int, int>, int>> newq;
visited[mecho_pos.first][mecho_pos.second] = true;
newq.push({mecho_pos, 0});
while(!newq.empty()) {
pair<pair<int, int>, int> curr = newq.front();
newq.pop();
int tmp = t + 1 + ((curr.second + 1) / s);
if(curr.first.first + 1 < n && tmp <= beed[curr.first.first + 1][curr.first.second] && !visited[curr.first.first + 1][curr.first.second] && (grid[curr.first.first + 1][curr.first.second] == 'G' || grid[curr.first.first + 1][curr.first.second] == 'M' || grid[curr.first.first + 1][curr.first.second] == 'D')) {
visited[curr.first.first + 1][curr.first.second] = true;
newq.push({{curr.first.first + 1, curr.first.second}, curr.second + 1});
}
if(curr.first.first - 1 >= 0 && tmp <= beed[curr.first.first - 1][curr.first.second] && !visited[curr.first.first - 1][curr.second] && (grid[curr.first.first - 1][curr.first.second] == 'G' || grid[curr.first.first - 1][curr.first.second] == 'M' || grid[curr.first.first - 1][curr.first.second] == 'D')) {
visited[curr.first.first - 1][curr.first.second] = true;
newq.push({{curr.first.first - 1, curr.first.second}, curr.second + 1});
}
if(curr.first.second + 1 < n && tmp <= beed[curr.first.first][curr.first.second + 1] && !visited[curr.first.first][curr.first.second + 1] && (grid[curr.first.first][curr.first.second + 1] == 'G' || grid[curr.first.first][curr.first.second + 1] == 'M' || grid[curr.first.first][curr.first.second + 1] == 'D')) {
visited[curr.first.first][curr.first.second + 1] = true;
newq.push({{curr.first.first, curr.first.second + 1}, curr.second + 1});
}
if(curr.first.second - 1 >= 0 && tmp <= beed[curr.first.first][curr.first.second - 1] && !visited[curr.first.first][curr.first.second - 1] && (grid[curr.first.first][curr.first.second - 1] == 'G' || grid[curr.first.first][curr.first.second - 1] == 'M' || grid[curr.first.first][curr.first.second - 1] == 'D')) {
visited[curr.first.first][curr.first.second - 1] = true;
newq.push({{curr.first.first, curr.first.second - 1}, curr.second + 1});
}
}
return visited[home_pos.first + 1][home_pos.second] || visited[home_pos.first - 1][home_pos.second] || visited[home_pos.first - 1][home_pos.second] || visited[home_pos.first][home_pos.second + 1] || visited[home_pos.first][home_pos.second - 1];
}
int main() {
vector<pair<int, int>> hives;
pair<int, int> mecho_pos;
cin >> n >> s;
for(int i = 0; i < n; i++) {
string tmp;
cin >> tmp;
for(int j = 0; j < n; j++) {
grid[i][j] = tmp[j];
if(grid[i][j] == 'H') {
hives.push_back({i, j});
}
if(grid[i][j] == 'M') {
mecho_pos = {i, j};
}
}
}
queue<pair<int, int>> q;
visited[mecho_pos.first][mecho_pos.second] = true;
steps[mecho_pos.first][mecho_pos.second] = 0;
q.push(mecho_pos);
while(!q.empty()) {
pair<int, int> curr = q.front();
q.pop();
if(curr.first + 1 < n && !visited[curr.first + 1][curr.second] && (grid[curr.first + 1][curr.second] == 'G' || grid[curr.first + 1][curr.second] == 'M' || grid[curr.first + 1][curr.second] == 'D')) {
visited[curr.first + 1][curr.second] = true;
steps[curr.first + 1][curr.second] = steps[curr.first][curr.second] + 1;
q.push({curr.first + 1, curr.second});
}
if(curr.first - 1 >= 0 && !visited[curr.first - 1][curr.second] && (grid[curr.first - 1][curr.second] == 'G' || grid[curr.first - 1][curr.second] == 'M' || grid[curr.first - 1][curr.second] == 'D')) {
visited[curr.first - 1][curr.second] = true;
steps[curr.first - 1][curr.second] = steps[curr.first][curr.second] + 1;
q.push({curr.first - 1, curr.second});
}
if(curr.second + 1 < n && !visited[curr.first][curr.second + 1] && (grid[curr.first][curr.second + 1] == 'G' || grid[curr.first][curr.second + 1] == 'M' || grid[curr.first][curr.second + 1] == 'D')) {
visited[curr.first][curr.second + 1] = true;
steps[curr.first][curr.second + 1] = steps[curr.first][curr.second] + 1;
q.push({curr.first, curr.second + 1});
}
if(curr.second - 1 >= 0 && !visited[curr.first][curr.second - 1] && (grid[curr.first][curr.second - 1] == 'G' || grid[curr.first][curr.second - 1] == 'M' || grid[curr.first][curr.second - 1] == 'D')) {
visited[curr.first][curr.second - 1] = true;
steps[curr.first][curr.second - 1] = steps[curr.first][curr.second] + 1;
q.push({curr.first, curr.second - 1});
}
}
for(int i = 0; i < n; i++) {
for(int j = 0; j < n; j++) {
visited[i][j] = false;
}
}
for(auto iter : hives) {
visited[iter.first][iter.second] = true;
beed[iter.first][iter.second] = 0;
q.push(iter);
}
while(!q.empty()) {
pair<int, int> curr = q.front();
q.pop();
if(curr.first + 1 < n && !visited[curr.first + 1][curr.second] && (grid[curr.first + 1][curr.second] == 'G' || grid[curr.first + 1][curr.second] == 'M')) {
visited[curr.first + 1][curr.second] = true;
beed[curr.first + 1][curr.second] = beed[curr.first][curr.second] + 1;
q.push({curr.first + 1, curr.second});
}
if(curr.first - 1 >= 0 && !visited[curr.first - 1][curr.second] && (grid[curr.first - 1][curr.second] == 'G' || grid[curr.first - 1][curr.second] == 'M')) {
visited[curr.first - 1][curr.second] = true;
beed[curr.first - 1][curr.second] = beed[curr.first][curr.second] + 1;
q.push({curr.first - 1, curr.second});
}
if(curr.second + 1 < n && !visited[curr.first][curr.second + 1] && (grid[curr.first][curr.second + 1] == 'G' || grid[curr.first][curr.second + 1] == 'M')) {
visited[curr.first][curr.second + 1] = true;
beed[curr.first][curr.second + 1] = beed[curr.first][curr.second] + 1;
q.push({curr.first, curr.second + 1});
}
if(curr.second - 1 >= 0 && !visited[curr.first][curr.second - 1] && (grid[curr.first][curr.second - 1] == 'G' || grid[curr.first][curr.second - 1] == 'M')) {
visited[curr.first][curr.second - 1] = true;
beed[curr.first][curr.second - 1] = beed[curr.first][curr.second] + 1;
q.push({curr.first, curr.second - 1});
}
}
int l = 0, r = n * n;
int ans = -1;
// true true true ... (true) false false
while(l <= r) {
int mid = l + (r - l) / 2;
if(check(mid)) {
ans = mid;
l = mid + 1;
} else {
r = mid - 1;
}
}
cout << ans;
return 0;
}
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
2396 KB |
Output is correct |
| 2 |
Correct |
1 ms |
2396 KB |
Output is correct |
| 3 |
Correct |
1 ms |
2396 KB |
Output is correct |
| 4 |
Correct |
1 ms |
2396 KB |
Output is correct |
| 5 |
Correct |
1 ms |
2396 KB |
Output is correct |
| 6 |
Correct |
1 ms |
2396 KB |
Output is correct |
| 7 |
Execution timed out |
1016 ms |
7204 KB |
Time limit exceeded |
| 8 |
Correct |
1 ms |
2392 KB |
Output is correct |
| 9 |
Correct |
1 ms |
2396 KB |
Output is correct |
| 10 |
Correct |
1 ms |
2396 KB |
Output is correct |
| 11 |
Correct |
0 ms |
2396 KB |
Output is correct |
| 12 |
Correct |
1 ms |
4700 KB |
Output is correct |
| 13 |
Correct |
1 ms |
2652 KB |
Output is correct |
| 14 |
Correct |
1 ms |
4700 KB |
Output is correct |
| 15 |
Correct |
1 ms |
2648 KB |
Output is correct |
| 16 |
Correct |
1 ms |
2396 KB |
Output is correct |
| 17 |
Correct |
1 ms |
2396 KB |
Output is correct |
| 18 |
Correct |
1 ms |
2396 KB |
Output is correct |
| 19 |
Correct |
1 ms |
2396 KB |
Output is correct |
| 20 |
Correct |
1 ms |
2652 KB |
Output is correct |
| 21 |
Correct |
1 ms |
2652 KB |
Output is correct |
| 22 |
Correct |
1 ms |
2652 KB |
Output is correct |
| 23 |
Correct |
1 ms |
2652 KB |
Output is correct |
| 24 |
Correct |
1 ms |
2652 KB |
Output is correct |
| 25 |
Correct |
1 ms |
4824 KB |
Output is correct |
| 26 |
Correct |
1 ms |
4700 KB |
Output is correct |
| 27 |
Correct |
1 ms |
4700 KB |
Output is correct |
| 28 |
Correct |
1 ms |
4700 KB |
Output is correct |
| 29 |
Correct |
1 ms |
4700 KB |
Output is correct |
| 30 |
Correct |
1 ms |
4804 KB |
Output is correct |
| 31 |
Correct |
1 ms |
4700 KB |
Output is correct |
| 32 |
Correct |
1 ms |
4700 KB |
Output is correct |
| 33 |
Correct |
7 ms |
5212 KB |
Output is correct |
| 34 |
Correct |
6 ms |
5336 KB |
Output is correct |
| 35 |
Correct |
318 ms |
5780 KB |
Output is correct |
| 36 |
Correct |
9 ms |
5468 KB |
Output is correct |
| 37 |
Correct |
8 ms |
5468 KB |
Output is correct |
| 38 |
Correct |
300 ms |
5660 KB |
Output is correct |
| 39 |
Correct |
11 ms |
5572 KB |
Output is correct |
| 40 |
Correct |
10 ms |
5464 KB |
Output is correct |
| 41 |
Correct |
327 ms |
5624 KB |
Output is correct |
| 42 |
Correct |
14 ms |
5464 KB |
Output is correct |
| 43 |
Correct |
11 ms |
5684 KB |
Output is correct |
| 44 |
Correct |
429 ms |
6204 KB |
Output is correct |
| 45 |
Correct |
17 ms |
5720 KB |
Output is correct |
| 46 |
Correct |
14 ms |
5724 KB |
Output is correct |
| 47 |
Correct |
474 ms |
6200 KB |
Output is correct |
| 48 |
Correct |
19 ms |
5976 KB |
Output is correct |
| 49 |
Correct |
16 ms |
5980 KB |
Output is correct |
| 50 |
Correct |
527 ms |
6416 KB |
Output is correct |
| 51 |
Correct |
23 ms |
6248 KB |
Output is correct |
| 52 |
Correct |
20 ms |
6232 KB |
Output is correct |
| 53 |
Correct |
521 ms |
6648 KB |
Output is correct |
| 54 |
Correct |
26 ms |
6488 KB |
Output is correct |
| 55 |
Correct |
21 ms |
6484 KB |
Output is correct |
| 56 |
Correct |
444 ms |
7084 KB |
Output is correct |
| 57 |
Correct |
31 ms |
6736 KB |
Output is correct |
| 58 |
Correct |
25 ms |
6852 KB |
Output is correct |
| 59 |
Correct |
415 ms |
6968 KB |
Output is correct |
| 60 |
Correct |
34 ms |
6996 KB |
Output is correct |
| 61 |
Correct |
28 ms |
6992 KB |
Output is correct |
| 62 |
Incorrect |
257 ms |
7512 KB |
Output isn't correct |
| 63 |
Incorrect |
100 ms |
6992 KB |
Output isn't correct |
| 64 |
Incorrect |
118 ms |
7252 KB |
Output isn't correct |
| 65 |
Incorrect |
113 ms |
6952 KB |
Output isn't correct |
| 66 |
Incorrect |
103 ms |
7076 KB |
Output isn't correct |
| 67 |
Correct |
110 ms |
6996 KB |
Output is correct |
| 68 |
Incorrect |
54 ms |
7428 KB |
Output isn't correct |
| 69 |
Incorrect |
59 ms |
6904 KB |
Output isn't correct |
| 70 |
Incorrect |
52 ms |
7152 KB |
Output isn't correct |
| 71 |
Incorrect |
45 ms |
7004 KB |
Output isn't correct |
| 72 |
Correct |
43 ms |
6996 KB |
Output is correct |
| 73 |
Correct |
309 ms |
8132 KB |
Output is correct |
| 74 |
Execution timed out |
1065 ms |
7552 KB |
Time limit exceeded |
| 75 |
Execution timed out |
1039 ms |
7696 KB |
Time limit exceeded |
| 76 |
Execution timed out |
1052 ms |
7508 KB |
Time limit exceeded |
| 77 |
Execution timed out |
1028 ms |
7700 KB |
Time limit exceeded |
| 78 |
Execution timed out |
1046 ms |
7772 KB |
Time limit exceeded |
| 79 |
Execution timed out |
1008 ms |
7504 KB |
Time limit exceeded |
| 80 |
Execution timed out |
1038 ms |
7476 KB |
Time limit exceeded |
| 81 |
Execution timed out |
1056 ms |
7596 KB |
Time limit exceeded |
| 82 |
Execution timed out |
1039 ms |
7576 KB |
Time limit exceeded |
| 83 |
Correct |
736 ms |
7844 KB |
Output is correct |
| 84 |
Correct |
680 ms |
7036 KB |
Output is correct |
| 85 |
Correct |
656 ms |
7508 KB |
Output is correct |
| 86 |
Correct |
762 ms |
7480 KB |
Output is correct |
| 87 |
Correct |
716 ms |
7644 KB |
Output is correct |
| 88 |
Correct |
835 ms |
7440 KB |
Output is correct |
| 89 |
Correct |
797 ms |
7256 KB |
Output is correct |
| 90 |
Correct |
898 ms |
7528 KB |
Output is correct |
| 91 |
Correct |
846 ms |
7504 KB |
Output is correct |
| 92 |
Correct |
957 ms |
7536 KB |
Output is correct |
