| # |
Submission time |
Handle |
Problem |
Language |
Result |
Execution time |
Memory |
| 535622 |
2022-03-10T16:55:42 Z |
louiskwok |
Mecho (IOI09_mecho) |
C++17 |
|
195 ms |
9348 KB |
#include <bits/stdc++.h>
using namespace std;
bool visited[805][805];
int distBee[805][805];
double distBear[805][805];
char g[805][805];
int dr[] = {-1,0,1,0};
int dc[] = {0,1,0,-1};
int n,sr,sc,er,ec,mxtime;
double s;
bool possible(double t) {
memset(visited,0,sizeof visited);
queue < pair<int,int> > bfs;
distBear[sr][sc] = t;
bfs.push({sr,sc});
while (!bfs.empty()) {
int curR = bfs.front().first;
int curC = bfs.front().second;
bfs.pop();
for (int i=0;i<4;i++) {
int nr = curR + dr[i];
int nc = curC + dc[i];
if (nr<1||nr>n||nc<1||nc>n||visited[nr][nc]||g[nr][nc]=='T'||distBear[curR][curC]+(double)1/s>(double)distBee[nr][nc]) continue;
if (nr==er&&nc==ec&&distBear[curR][curC]+(double)1/s<=(double)distBee[nr][nc]) return true;
visited[nr][nc] = true;
distBear[nr][nc] = distBear[curR][curC]+1/s;
bfs.push({nr,nc});
}
}
if (visited[er][ec]) return true;
return false;
}
int main() {
queue < pair<int,int> > bfs;
cin >> n >> s;
for (int i=1;i<=n;i++) {
for (int j=1;j<=n;j++) {
cin >> g[i][j];
if (g[i][j]=='M') sr = i,sc = j;
else if (g[i][j]=='D') er = i,ec = j;
else if (g[i][j]=='H') {
visited[i][j] = true;
bfs.push({i,j});
}
}
}
while (!bfs.empty()) {
int curR = bfs.front().first;
int curC = bfs.front().second;
bfs.pop();
for (int i=0;i<4;i++) {
int nr = curR + dr[i];
int nc = curC + dc[i];
if (nr==sr&&nc==sc) distBee[nr][nc] = distBee[curR][curC]+1;
if (nr<1||nr>n||nc<1||nc>n||visited[nr][nc]||g[nr][nc]=='T'||g[nr][nc]=='M') continue;
visited[nr][nc] = true;
distBee[nr][nc] = distBee[curR][curC]+1;
mxtime = max(mxtime,distBee[nr][nc]);
bfs.push({nr,nc});
}
}
int lo = 0,hi = distBee[sr][sc]-1;
while (lo<hi) {
int mid = (lo+hi+1)/2;
if (possible((double)mid)) lo = mid;
else hi = mid-1;
}
if (!possible(0)) cout << -1 << endl;
else cout << lo << endl;
return 0;
}
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
1 ms |
980 KB |
Output isn't correct |
| 2 |
Incorrect |
1 ms |
980 KB |
Output isn't correct |
| 3 |
Incorrect |
1 ms |
980 KB |
Output isn't correct |
| 4 |
Incorrect |
1 ms |
980 KB |
Output isn't correct |
| 5 |
Correct |
1 ms |
980 KB |
Output is correct |
| 6 |
Incorrect |
1 ms |
980 KB |
Output isn't correct |
| 7 |
Incorrect |
115 ms |
9108 KB |
Output isn't correct |
| 8 |
Incorrect |
1 ms |
980 KB |
Output isn't correct |
| 9 |
Correct |
1 ms |
980 KB |
Output is correct |
| 10 |
Correct |
1 ms |
980 KB |
Output is correct |
| 11 |
Correct |
1 ms |
980 KB |
Output is correct |
| 12 |
Incorrect |
1 ms |
1364 KB |
Output isn't correct |
| 13 |
Incorrect |
1 ms |
1236 KB |
Output isn't correct |
| 14 |
Correct |
2 ms |
1236 KB |
Output is correct |
| 15 |
Incorrect |
1 ms |
980 KB |
Output isn't correct |
| 16 |
Correct |
1 ms |
980 KB |
Output is correct |
| 17 |
Incorrect |
1 ms |
980 KB |
Output isn't correct |
| 18 |
Correct |
1 ms |
980 KB |
Output is correct |
| 19 |
Incorrect |
1 ms |
980 KB |
Output isn't correct |
| 20 |
Correct |
1 ms |
980 KB |
Output is correct |
| 21 |
Incorrect |
1 ms |
1108 KB |
Output isn't correct |
| 22 |
Correct |
1 ms |
1108 KB |
Output is correct |
| 23 |
Incorrect |
1 ms |
1108 KB |
Output isn't correct |
| 24 |
Correct |
1 ms |
1108 KB |
Output is correct |
| 25 |
Incorrect |
1 ms |
1108 KB |
Output isn't correct |
| 26 |
Correct |
1 ms |
1108 KB |
Output is correct |
| 27 |
Incorrect |
1 ms |
1108 KB |
Output isn't correct |
| 28 |
Correct |
1 ms |
1236 KB |
Output is correct |
| 29 |
Incorrect |
1 ms |
1108 KB |
Output isn't correct |
| 30 |
Correct |
1 ms |
1236 KB |
Output is correct |
| 31 |
Incorrect |
1 ms |
1236 KB |
Output isn't correct |
| 32 |
Correct |
2 ms |
1236 KB |
Output is correct |
| 33 |
Incorrect |
11 ms |
2240 KB |
Output isn't correct |
| 34 |
Correct |
13 ms |
2336 KB |
Output is correct |
| 35 |
Correct |
32 ms |
4520 KB |
Output is correct |
| 36 |
Incorrect |
12 ms |
2516 KB |
Output isn't correct |
| 37 |
Correct |
12 ms |
2516 KB |
Output is correct |
| 38 |
Correct |
32 ms |
5020 KB |
Output is correct |
| 39 |
Incorrect |
14 ms |
2668 KB |
Output isn't correct |
| 40 |
Correct |
16 ms |
2656 KB |
Output is correct |
| 41 |
Correct |
45 ms |
5440 KB |
Output is correct |
| 42 |
Incorrect |
18 ms |
2840 KB |
Output isn't correct |
| 43 |
Correct |
23 ms |
2952 KB |
Output is correct |
| 44 |
Correct |
61 ms |
6036 KB |
Output is correct |
| 45 |
Incorrect |
22 ms |
3100 KB |
Output isn't correct |
| 46 |
Correct |
22 ms |
3168 KB |
Output is correct |
| 47 |
Correct |
65 ms |
6484 KB |
Output is correct |
| 48 |
Incorrect |
25 ms |
3216 KB |
Output isn't correct |
| 49 |
Correct |
24 ms |
3320 KB |
Output is correct |
| 50 |
Correct |
78 ms |
6988 KB |
Output is correct |
| 51 |
Incorrect |
34 ms |
3452 KB |
Output isn't correct |
| 52 |
Correct |
31 ms |
3512 KB |
Output is correct |
| 53 |
Correct |
106 ms |
7464 KB |
Output is correct |
| 54 |
Incorrect |
32 ms |
3580 KB |
Output isn't correct |
| 55 |
Correct |
35 ms |
3696 KB |
Output is correct |
| 56 |
Correct |
110 ms |
8200 KB |
Output is correct |
| 57 |
Incorrect |
40 ms |
3776 KB |
Output isn't correct |
| 58 |
Correct |
38 ms |
3916 KB |
Output is correct |
| 59 |
Correct |
123 ms |
8476 KB |
Output is correct |
| 60 |
Incorrect |
43 ms |
4072 KB |
Output isn't correct |
| 61 |
Correct |
43 ms |
4124 KB |
Output is correct |
| 62 |
Correct |
154 ms |
9176 KB |
Output is correct |
| 63 |
Correct |
125 ms |
8956 KB |
Output is correct |
| 64 |
Correct |
188 ms |
9000 KB |
Output is correct |
| 65 |
Correct |
195 ms |
9060 KB |
Output is correct |
| 66 |
Correct |
171 ms |
9060 KB |
Output is correct |
| 67 |
Correct |
139 ms |
8860 KB |
Output is correct |
| 68 |
Correct |
80 ms |
8576 KB |
Output is correct |
| 69 |
Correct |
67 ms |
8840 KB |
Output is correct |
| 70 |
Correct |
66 ms |
8448 KB |
Output is correct |
| 71 |
Correct |
68 ms |
8380 KB |
Output is correct |
| 72 |
Incorrect |
87 ms |
8944 KB |
Output isn't correct |
| 73 |
Incorrect |
92 ms |
9340 KB |
Output isn't correct |
| 74 |
Correct |
93 ms |
9320 KB |
Output is correct |
| 75 |
Correct |
91 ms |
9348 KB |
Output is correct |
| 76 |
Correct |
93 ms |
9188 KB |
Output is correct |
| 77 |
Correct |
93 ms |
9236 KB |
Output is correct |
| 78 |
Correct |
97 ms |
6648 KB |
Output is correct |
| 79 |
Correct |
88 ms |
9296 KB |
Output is correct |
| 80 |
Correct |
83 ms |
6640 KB |
Output is correct |
| 81 |
Correct |
100 ms |
6676 KB |
Output is correct |
| 82 |
Correct |
87 ms |
6860 KB |
Output is correct |
| 83 |
Correct |
101 ms |
6732 KB |
Output is correct |
| 84 |
Correct |
101 ms |
9272 KB |
Output is correct |
| 85 |
Correct |
98 ms |
6748 KB |
Output is correct |
| 86 |
Correct |
108 ms |
6860 KB |
Output is correct |
| 87 |
Correct |
101 ms |
7108 KB |
Output is correct |
| 88 |
Correct |
100 ms |
6968 KB |
Output is correct |
| 89 |
Correct |
109 ms |
9176 KB |
Output is correct |
| 90 |
Correct |
114 ms |
8308 KB |
Output is correct |
| 91 |
Correct |
124 ms |
9264 KB |
Output is correct |
| 92 |
Correct |
114 ms |
7212 KB |
Output is correct |
