| # |
Submission time |
Handle |
Problem |
Language |
Result |
Execution time |
Memory |
| 264690 |
2020-08-14T08:24:18 Z |
WLZ |
Mecho (IOI09_mecho) |
C++14 |
|
988 ms |
6312 KB |
#include <bits/stdc++.h>
using namespace std;
const int INF = 0x3f3f3f3f;
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> > q;
vector< vector<int> > dist1(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') {
mr = i; mc = j;
} else if (grid[i][j] == 'H') {
q.push({i, j});
dist1[i][j] = 0;
} else if (grid[i][j] == 'D') {
dr = i; dc = j;
}
}
}
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] != -1) {
continue;
}
dist1[nr][nc] = dist1[r][c] + s;
q.push({nr, nc});
}
}
int lo = 0, hi = n * n, ans = -1;
for (int i = 0; i < 50; i++) {
int mid = (lo + hi) / 2;
//cout << mid << endl;
vector< vector<int> > dist2(n, vector<int>(n, INF));
dist2[mr][mc] = s * mid;
if (dist2[mr][mc] >= dist1[mr][mc]) {
hi = mid - 1;
continue;
}
q.push({mr, mc});
while (!q.empty()) {
int r = q.front().first, c = q.front().second;
//cout << r << ' ' << c << endl;
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 || dist2[r][c] + 1 >= dist2[nr][nc] || (!(nr == dr && nc == dc) && dist2[r][c] + 1 >= dist1[nr][nc]) || grid[nr][nc] == 'T') {
continue;
}
dist2[nr][nc] = dist2[r][c] + 1;
q.push({nr, nc});
}
}
if (dist2[dr][dc] <= dist1[dr][dc]) {
ans = mid;
lo = mid - 1;
} else {
hi = mid - 1;
}
}
cout << ans << '\n';
return 0;
}
Compilation message
mecho.cpp: In function 'int main()':
mecho.cpp:47:17: warning: 'mc' may be used uninitialized in this function [-Wmaybe-uninitialized]
47 | dist2[mr][mc] = s * mid;
| ^
mecho.cpp:47:13: warning: 'mr' may be used uninitialized in this function [-Wmaybe-uninitialized]
47 | dist2[mr][mc] = s * mid;
| ^
mecho.cpp:66:21: warning: 'dc' may be used uninitialized in this function [-Wmaybe-uninitialized]
66 | if (dist2[dr][dc] <= dist1[dr][dc]) {
| ^
mecho.cpp:66:17: warning: 'dr' may be used uninitialized in this function [-Wmaybe-uninitialized]
66 | if (dist2[dr][dc] <= dist1[dr][dc]) {
| ^
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
384 KB |
Output is correct |
| 2 |
Incorrect |
1 ms |
384 KB |
Output isn't correct |
| 3 |
Correct |
1 ms |
384 KB |
Output is 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 |
577 ms |
6268 KB |
Output isn't correct |
| 8 |
Correct |
1 ms |
384 KB |
Output is 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 |
384 KB |
Output is correct |
| 12 |
Incorrect |
1 ms |
384 KB |
Output isn't correct |
| 13 |
Correct |
2 ms |
384 KB |
Output is correct |
| 14 |
Correct |
3 ms |
384 KB |
Output is correct |
| 15 |
Correct |
1 ms |
384 KB |
Output is correct |
| 16 |
Incorrect |
1 ms |
384 KB |
Output isn't correct |
| 17 |
Correct |
1 ms |
384 KB |
Output is correct |
| 18 |
Incorrect |
1 ms |
384 KB |
Output isn't correct |
| 19 |
Correct |
1 ms |
384 KB |
Output is correct |
| 20 |
Incorrect |
1 ms |
384 KB |
Output isn't correct |
| 21 |
Correct |
1 ms |
384 KB |
Output is correct |
| 22 |
Incorrect |
1 ms |
384 KB |
Output isn't correct |
| 23 |
Correct |
1 ms |
384 KB |
Output is correct |
| 24 |
Incorrect |
1 ms |
384 KB |
Output isn't correct |
| 25 |
Incorrect |
1 ms |
384 KB |
Output isn't correct |
| 26 |
Incorrect |
1 ms |
384 KB |
Output isn't correct |
| 27 |
Correct |
1 ms |
384 KB |
Output is correct |
| 28 |
Incorrect |
1 ms |
384 KB |
Output isn't correct |
| 29 |
Incorrect |
2 ms |
384 KB |
Output isn't correct |
| 30 |
Correct |
1 ms |
384 KB |
Output is correct |
| 31 |
Incorrect |
1 ms |
384 KB |
Output isn't correct |
| 32 |
Incorrect |
2 ms |
384 KB |
Output isn't correct |
| 33 |
Correct |
14 ms |
1508 KB |
Output is correct |
| 34 |
Incorrect |
19 ms |
1504 KB |
Output isn't correct |
| 35 |
Incorrect |
145 ms |
1500 KB |
Output isn't correct |
| 36 |
Correct |
21 ms |
1852 KB |
Output is correct |
| 37 |
Correct |
23 ms |
1844 KB |
Output is correct |
| 38 |
Incorrect |
200 ms |
1848 KB |
Output isn't correct |
| 39 |
Incorrect |
23 ms |
2224 KB |
Output isn't correct |
| 40 |
Incorrect |
25 ms |
2224 KB |
Output isn't correct |
| 41 |
Incorrect |
234 ms |
2256 KB |
Output isn't correct |
| 42 |
Incorrect |
29 ms |
2832 KB |
Output isn't correct |
| 43 |
Incorrect |
31 ms |
2836 KB |
Output isn't correct |
| 44 |
Incorrect |
350 ms |
2656 KB |
Output isn't correct |
| 45 |
Correct |
50 ms |
3104 KB |
Output is correct |
| 46 |
Incorrect |
39 ms |
3104 KB |
Output isn't correct |
| 47 |
Incorrect |
352 ms |
3216 KB |
Output isn't correct |
| 48 |
Correct |
48 ms |
3804 KB |
Output is correct |
| 49 |
Incorrect |
57 ms |
3640 KB |
Output isn't correct |
| 50 |
Incorrect |
441 ms |
3672 KB |
Output isn't correct |
| 51 |
Correct |
49 ms |
4364 KB |
Output is correct |
| 52 |
Incorrect |
53 ms |
4176 KB |
Output isn't correct |
| 53 |
Incorrect |
534 ms |
4208 KB |
Output isn't correct |
| 54 |
Correct |
58 ms |
4936 KB |
Output is correct |
| 55 |
Correct |
70 ms |
4928 KB |
Output is correct |
| 56 |
Incorrect |
712 ms |
4928 KB |
Output isn't correct |
| 57 |
Incorrect |
87 ms |
5560 KB |
Output isn't correct |
| 58 |
Incorrect |
70 ms |
5580 KB |
Output isn't correct |
| 59 |
Correct |
721 ms |
5448 KB |
Output is correct |
| 60 |
Correct |
78 ms |
6288 KB |
Output is correct |
| 61 |
Incorrect |
85 ms |
6252 KB |
Output isn't correct |
| 62 |
Incorrect |
914 ms |
6260 KB |
Output isn't correct |
| 63 |
Correct |
796 ms |
6152 KB |
Output is correct |
| 64 |
Incorrect |
988 ms |
6148 KB |
Output isn't correct |
| 65 |
Incorrect |
918 ms |
6312 KB |
Output isn't correct |
| 66 |
Incorrect |
780 ms |
6152 KB |
Output isn't correct |
| 67 |
Correct |
615 ms |
6204 KB |
Output is correct |
| 68 |
Correct |
356 ms |
6184 KB |
Output is correct |
| 69 |
Incorrect |
328 ms |
6168 KB |
Output isn't correct |
| 70 |
Incorrect |
249 ms |
6200 KB |
Output isn't correct |
| 71 |
Incorrect |
233 ms |
6192 KB |
Output isn't correct |
| 72 |
Incorrect |
110 ms |
6232 KB |
Output isn't correct |
| 73 |
Correct |
405 ms |
6200 KB |
Output is correct |
| 74 |
Correct |
322 ms |
6208 KB |
Output is correct |
| 75 |
Correct |
413 ms |
6200 KB |
Output is correct |
| 76 |
Correct |
342 ms |
6240 KB |
Output is correct |
| 77 |
Correct |
326 ms |
6240 KB |
Output is correct |
| 78 |
Correct |
442 ms |
6200 KB |
Output is correct |
| 79 |
Incorrect |
309 ms |
6308 KB |
Output isn't correct |
| 80 |
Incorrect |
437 ms |
6196 KB |
Output isn't correct |
| 81 |
Incorrect |
442 ms |
6196 KB |
Output isn't correct |
| 82 |
Incorrect |
396 ms |
6292 KB |
Output isn't correct |
| 83 |
Correct |
534 ms |
6240 KB |
Output is correct |
| 84 |
Incorrect |
432 ms |
6224 KB |
Output isn't correct |
| 85 |
Incorrect |
549 ms |
6224 KB |
Output isn't correct |
| 86 |
Incorrect |
481 ms |
6288 KB |
Output isn't correct |
| 87 |
Incorrect |
503 ms |
6196 KB |
Output isn't correct |
| 88 |
Correct |
606 ms |
6292 KB |
Output is correct |
| 89 |
Correct |
545 ms |
6208 KB |
Output is correct |
| 90 |
Incorrect |
542 ms |
6240 KB |
Output isn't correct |
| 91 |
Correct |
555 ms |
6304 KB |
Output is correct |
| 92 |
Incorrect |
526 ms |
6252 KB |
Output isn't correct |
