| # |
Submission time |
Handle |
Problem |
Language |
Result |
Execution time |
Memory |
| 264502 |
2020-08-14T07:17:19 Z |
WLZ |
Mecho (IOI09_mecho) |
C++14 |
|
1000 ms |
7160 KB |
#include <bits/stdc++.h>
using namespace std;
const vector<int> dx = {0, 0, -1, 1};
const vector<int> dy = {1, -1, 0, 0};
int main() {
ios::sync_with_stdio(false);
cin.tie(0);
int n, s;
cin >> n >> s;
vector<string> grid(n);
queue< pair<int, int> > q1, q2;
vector< vector<int> > dist1(n, vector<int>(n, -1)), dist2(n, vector<int>(n, -1));
int mr, mc, dr, dc;
for (int i = 0; i < n; i++) {
cin >> grid[i];
for (int j = 0; j < n; j++) {
if (grid[i][j] == 'M') {
q1.push({i, j});
dist1[i][j] = 0;
mr = i; mc = j;
} else if (grid[i][j] == 'H') {
q2.push({i, j});
dist2[i][j] = 0;
} else if (grid[i][j] == 'D') {
dr = i; dc = j;
}
}
}
while (!q1.empty()) {
int r = q1.front().first, c = q1.front().second;
q1.pop();
for (int k = 0; k < 4; k++) {
int nr = r + dx[k], nc = c + dy[k];
if (nr < 0 || nr >= n || nc < 0 || nc >= n || grid[nr][nc] == 'T' || dist1[nr][nc] != -1) {
continue;
}
dist1[nr][nc] = dist1[r][c] + 1;
q1.push({nr, nc});
}
}
while (!q2.empty()) {
int r = q2.front().first, c = q2.front().second;
q2.pop();
for (int k = 0; k < 4; k++) {
int nr = r + dx[k], nc = c + dy[k];
if (nr < 0 || nr >= n || nc < 0 || nc >= n || grid[nr][nc] == 'T' || dist2[nr][nc] != -1) {
continue;
}
dist2[nr][nc] = dist2[r][c] + s;
q2.push({nr, nc});
}
}
int lo = 0, hi = n * n, ans = -1;
for (int i = 0; i < 50; i++) {
int mid = (lo + hi + 1) / 2;
vector< vector<bool> > was(n, vector<bool>(n, false));
queue< pair<int, int> > q;
q.push({mr, mc});
while (!q.empty()) {
int r = q.front().first, c = q.front().second;
q.pop();
for (int k = 0; k < 4; k++) {
int nr = r + dx[k], nc = c + dy[k];
if (nr < 0 || nr >= n || nc < 0 || nc >= n || grid[nr][nc] == 'T' || dist1[nr][nc] + 4 * mid > dist2[nr][nc] || was[nr][nc]) {
continue;
}
was[nr][nc] = true;
q.push({nr, nc});
}
}
if (was[dr][dc]) {
lo = mid;
ans = mid;
} else {
hi = mid - 1;
}
}
cout << ans << '\n';
return 0;
}
Compilation message
mecho.cpp: In function 'int main()':
mecho.cpp:73:15: warning: 'dr' may be used uninitialized in this function [-Wmaybe-uninitialized]
73 | if (was[dr][dc]) {
| ^
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
1 ms |
384 KB |
Output isn't correct |
| 2 |
Incorrect |
1 ms |
384 KB |
Output isn't correct |
| 3 |
Incorrect |
0 ms |
384 KB |
Output isn't correct |
| 4 |
Incorrect |
1 ms |
384 KB |
Output isn't correct |
| 5 |
Correct |
1 ms |
384 KB |
Output is correct |
| 6 |
Incorrect |
1 ms |
384 KB |
Output isn't correct |
| 7 |
Incorrect |
626 ms |
6908 KB |
Output isn't correct |
| 8 |
Incorrect |
1 ms |
384 KB |
Output isn't correct |
| 9 |
Incorrect |
1 ms |
384 KB |
Output isn't correct |
| 10 |
Incorrect |
1 ms |
384 KB |
Output isn't correct |
| 11 |
Correct |
1 ms |
388 KB |
Output is correct |
| 12 |
Incorrect |
1 ms |
384 KB |
Output isn't correct |
| 13 |
Incorrect |
3 ms |
384 KB |
Output isn't correct |
| 14 |
Correct |
3 ms |
384 KB |
Output is correct |
| 15 |
Incorrect |
1 ms |
384 KB |
Output isn't correct |
| 16 |
Incorrect |
1 ms |
384 KB |
Output isn't correct |
| 17 |
Incorrect |
1 ms |
384 KB |
Output isn't correct |
| 18 |
Incorrect |
1 ms |
384 KB |
Output isn't correct |
| 19 |
Incorrect |
1 ms |
384 KB |
Output isn't correct |
| 20 |
Incorrect |
1 ms |
384 KB |
Output isn't correct |
| 21 |
Incorrect |
1 ms |
384 KB |
Output isn't correct |
| 22 |
Incorrect |
1 ms |
384 KB |
Output isn't correct |
| 23 |
Incorrect |
2 ms |
384 KB |
Output isn't correct |
| 24 |
Incorrect |
2 ms |
384 KB |
Output isn't correct |
| 25 |
Incorrect |
2 ms |
384 KB |
Output isn't correct |
| 26 |
Incorrect |
3 ms |
384 KB |
Output isn't correct |
| 27 |
Incorrect |
1 ms |
384 KB |
Output isn't correct |
| 28 |
Incorrect |
3 ms |
384 KB |
Output isn't correct |
| 29 |
Incorrect |
1 ms |
384 KB |
Output isn't correct |
| 30 |
Incorrect |
3 ms |
384 KB |
Output isn't correct |
| 31 |
Incorrect |
2 ms |
384 KB |
Output isn't correct |
| 32 |
Incorrect |
4 ms |
384 KB |
Output isn't correct |
| 33 |
Incorrect |
11 ms |
1664 KB |
Output isn't correct |
| 34 |
Incorrect |
87 ms |
1664 KB |
Output isn't correct |
| 35 |
Incorrect |
165 ms |
1664 KB |
Output isn't correct |
| 36 |
Incorrect |
10 ms |
2176 KB |
Output isn't correct |
| 37 |
Incorrect |
111 ms |
2048 KB |
Output isn't correct |
| 38 |
Incorrect |
219 ms |
2048 KB |
Output isn't correct |
| 39 |
Incorrect |
11 ms |
2464 KB |
Output isn't correct |
| 40 |
Incorrect |
137 ms |
2432 KB |
Output isn't correct |
| 41 |
Incorrect |
279 ms |
2476 KB |
Output isn't correct |
| 42 |
Incorrect |
17 ms |
2944 KB |
Output isn't correct |
| 43 |
Incorrect |
175 ms |
2960 KB |
Output isn't correct |
| 44 |
Incorrect |
362 ms |
3064 KB |
Output isn't correct |
| 45 |
Incorrect |
20 ms |
3456 KB |
Output isn't correct |
| 46 |
Incorrect |
219 ms |
3512 KB |
Output isn't correct |
| 47 |
Incorrect |
458 ms |
3492 KB |
Output isn't correct |
| 48 |
Incorrect |
20 ms |
4096 KB |
Output isn't correct |
| 49 |
Incorrect |
249 ms |
4096 KB |
Output isn't correct |
| 50 |
Incorrect |
580 ms |
4216 KB |
Output isn't correct |
| 51 |
Incorrect |
23 ms |
4608 KB |
Output isn't correct |
| 52 |
Incorrect |
303 ms |
4736 KB |
Output isn't correct |
| 53 |
Incorrect |
642 ms |
4728 KB |
Output isn't correct |
| 54 |
Incorrect |
31 ms |
5368 KB |
Output isn't correct |
| 55 |
Incorrect |
350 ms |
5496 KB |
Output isn't correct |
| 56 |
Incorrect |
819 ms |
5396 KB |
Output isn't correct |
| 57 |
Incorrect |
33 ms |
6016 KB |
Output isn't correct |
| 58 |
Incorrect |
421 ms |
6120 KB |
Output isn't correct |
| 59 |
Incorrect |
914 ms |
6016 KB |
Output isn't correct |
| 60 |
Incorrect |
36 ms |
6784 KB |
Output isn't correct |
| 61 |
Incorrect |
505 ms |
6784 KB |
Output isn't correct |
| 62 |
Execution timed out |
1079 ms |
6792 KB |
Time limit exceeded |
| 63 |
Correct |
733 ms |
6904 KB |
Output is correct |
| 64 |
Incorrect |
987 ms |
6920 KB |
Output isn't correct |
| 65 |
Correct |
821 ms |
6904 KB |
Output is correct |
| 66 |
Incorrect |
642 ms |
7032 KB |
Output isn't correct |
| 67 |
Correct |
574 ms |
6784 KB |
Output is correct |
| 68 |
Incorrect |
257 ms |
6904 KB |
Output isn't correct |
| 69 |
Incorrect |
262 ms |
6784 KB |
Output isn't correct |
| 70 |
Incorrect |
195 ms |
6784 KB |
Output isn't correct |
| 71 |
Incorrect |
182 ms |
6784 KB |
Output isn't correct |
| 72 |
Incorrect |
68 ms |
6784 KB |
Output isn't correct |
| 73 |
Incorrect |
419 ms |
7032 KB |
Output isn't correct |
| 74 |
Incorrect |
343 ms |
7032 KB |
Output isn't correct |
| 75 |
Incorrect |
395 ms |
7160 KB |
Output isn't correct |
| 76 |
Incorrect |
353 ms |
7040 KB |
Output isn't correct |
| 77 |
Incorrect |
388 ms |
7160 KB |
Output isn't correct |
| 78 |
Correct |
493 ms |
7036 KB |
Output is correct |
| 79 |
Incorrect |
357 ms |
7036 KB |
Output isn't correct |
| 80 |
Incorrect |
425 ms |
7036 KB |
Output isn't correct |
| 81 |
Incorrect |
487 ms |
6904 KB |
Output isn't correct |
| 82 |
Incorrect |
379 ms |
7136 KB |
Output isn't correct |
| 83 |
Correct |
588 ms |
6992 KB |
Output is correct |
| 84 |
Incorrect |
491 ms |
7032 KB |
Output isn't correct |
| 85 |
Incorrect |
505 ms |
7000 KB |
Output isn't correct |
| 86 |
Incorrect |
606 ms |
6996 KB |
Output isn't correct |
| 87 |
Incorrect |
580 ms |
7000 KB |
Output isn't correct |
| 88 |
Incorrect |
827 ms |
6944 KB |
Output isn't correct |
| 89 |
Incorrect |
777 ms |
6904 KB |
Output isn't correct |
| 90 |
Incorrect |
720 ms |
6952 KB |
Output isn't correct |
| 91 |
Incorrect |
641 ms |
6904 KB |
Output isn't correct |
| 92 |
Incorrect |
725 ms |
6920 KB |
Output isn't correct |
