| # |
Submission time |
Handle |
Problem |
Language |
Result |
Execution time |
Memory |
| 1072468 |
2024-08-23T19:36:34 Z |
7again |
Mecho (IOI09_mecho) |
C++17 |
|
394 ms |
6480 KB |
#include <bits/stdc++.h>
using namespace std ;
const int N = 801 ;
int dx[] = {-1, 0, 1, 0};
int dy[] = {0, -1, 0, 1};
int n , s ;
pair <int , int> Honey , Home ;
char a[N][N] ;
bool inside(int x , int y) {
return (x >= 0 && y >= 0 && x < n && y < n && a[x][y] != 'T') ;
}
bool val(int x , int y) {
return x / s < y ;
}
int ok(int time) {
int mn2[n + 4][n + 4] ;
fill_n(&mn2[0][0] , (n + 4) * (n + 4) , 1e9) ;
queue<pair <int , int>> q2 ;
for(int i = 0 ; i < n ; i++) {
for(int j = 0 ; j < n ; j++) {
if(a[i][j] == 'H') {
q2.push({i, j}) ;
mn2[i][j] = 0 ;
}
}
}
while(q2.size()) {
pair <int , int> t = q2.front() ;
q2.pop() ;
for(int i = 0 ; i < 4 ; i++) {
int x = t.first + dx[i] ;
int y = t.second + dy[i] ;
if(inside(x , y) && mn2[t.first][t.second] + 1 < mn2[x][y]) {
mn2[x][y] = mn2[t.first][t.second] + 1 ;
q2.push({x, y}) ;
}
}
}
int mn[n + 4][n + 4] ;
fill_n(&mn[0][0] , (n + 4) * (n + 4) , 1e9 ) ;
queue <pair <int , int>> q ;
mn[Honey.first][Honey.second] = 0 ;
if(mn2[Honey.first][Honey.second] > time)
q.push(Honey) ;
while(!q.empty()) {
pair <int , int> t = q.front() ;
q.pop() ;
for(int i = 0 ; i < 4 ; i++) {
int x = t.first + dx[i] ;
int y = t.second + dy[i] ;
if(inside(x , y) && val(mn[t.first][t.second] + 1 , mn2[x][y] - time) && mn[t.first][t.second] + 1 < mn[x][y]) {
mn[x][y] = mn[t.first][t.second] + 1 ;
q.push({x , y}) ;
}
}
}
for(int i = 0 ; i < 4 ; i++){
int x = Home.first + dx[i] ;
int y = Home.second + dy[i] ;
if(inside(x , y) && val(mn[x][y] , mn2[x][y] - time))
return true ;
}
return false ;
}
int main() {
cin >> n >> s ;
for(int i = 0 ; i < n ; i++) {
for(int j = 0 ; j < n ; j++) {
cin >> a[i][j] ;
if(a[i][j] == 'M')
Honey = {i , j} ;
if(a[i][j] == 'D')
Home = {i , j} ;
}
}
int l = 0 , r = n * n + 4 ;
while(l <= r) {
int m = l + (r - l) / 2 ;
if(ok(m))
l = m + 1 ;
else
r = m - 1 ;
}
cout << l - 1 << endl ;
}
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
0 ms |
348 KB |
Output is correct |
| 2 |
Correct |
0 ms |
348 KB |
Output is correct |
| 3 |
Correct |
1 ms |
348 KB |
Output is correct |
| 4 |
Correct |
0 ms |
348 KB |
Output is correct |
| 5 |
Correct |
0 ms |
348 KB |
Output is correct |
| 6 |
Correct |
0 ms |
348 KB |
Output is correct |
| 7 |
Correct |
282 ms |
6172 KB |
Output is correct |
| 8 |
Correct |
1 ms |
348 KB |
Output is correct |
| 9 |
Correct |
1 ms |
348 KB |
Output is correct |
| 10 |
Correct |
0 ms |
348 KB |
Output is correct |
| 11 |
Correct |
1 ms |
348 KB |
Output is correct |
| 12 |
Incorrect |
1 ms |
348 KB |
Output isn't correct |
| 13 |
Correct |
1 ms |
348 KB |
Output is correct |
| 14 |
Correct |
2 ms |
600 KB |
Output is correct |
| 15 |
Correct |
0 ms |
348 KB |
Output is correct |
| 16 |
Correct |
1 ms |
348 KB |
Output is correct |
| 17 |
Correct |
0 ms |
348 KB |
Output is correct |
| 18 |
Correct |
1 ms |
348 KB |
Output is correct |
| 19 |
Correct |
0 ms |
348 KB |
Output is correct |
| 20 |
Correct |
0 ms |
348 KB |
Output is correct |
| 21 |
Correct |
0 ms |
348 KB |
Output is correct |
| 22 |
Correct |
0 ms |
348 KB |
Output is correct |
| 23 |
Correct |
1 ms |
348 KB |
Output is correct |
| 24 |
Correct |
0 ms |
348 KB |
Output is correct |
| 25 |
Correct |
1 ms |
348 KB |
Output is correct |
| 26 |
Correct |
1 ms |
348 KB |
Output is correct |
| 27 |
Correct |
1 ms |
348 KB |
Output is correct |
| 28 |
Correct |
1 ms |
348 KB |
Output is correct |
| 29 |
Correct |
1 ms |
348 KB |
Output is correct |
| 30 |
Correct |
1 ms |
348 KB |
Output is correct |
| 31 |
Correct |
1 ms |
348 KB |
Output is correct |
| 32 |
Correct |
1 ms |
348 KB |
Output is correct |
| 33 |
Correct |
23 ms |
1628 KB |
Output is correct |
| 34 |
Correct |
20 ms |
1688 KB |
Output is correct |
| 35 |
Correct |
48 ms |
1628 KB |
Output is correct |
| 36 |
Correct |
30 ms |
1880 KB |
Output is correct |
| 37 |
Correct |
28 ms |
1884 KB |
Output is correct |
| 38 |
Correct |
50 ms |
1884 KB |
Output is correct |
| 39 |
Correct |
53 ms |
2648 KB |
Output is correct |
| 40 |
Correct |
35 ms |
2396 KB |
Output is correct |
| 41 |
Correct |
85 ms |
2396 KB |
Output is correct |
| 42 |
Correct |
49 ms |
2652 KB |
Output is correct |
| 43 |
Correct |
42 ms |
2652 KB |
Output is correct |
| 44 |
Correct |
84 ms |
2648 KB |
Output is correct |
| 45 |
Correct |
59 ms |
3164 KB |
Output is correct |
| 46 |
Correct |
53 ms |
3160 KB |
Output is correct |
| 47 |
Correct |
105 ms |
3244 KB |
Output is correct |
| 48 |
Correct |
71 ms |
3672 KB |
Output is correct |
| 49 |
Correct |
62 ms |
3672 KB |
Output is correct |
| 50 |
Correct |
120 ms |
3676 KB |
Output is correct |
| 51 |
Correct |
84 ms |
4184 KB |
Output is correct |
| 52 |
Correct |
78 ms |
4188 KB |
Output is correct |
| 53 |
Correct |
152 ms |
4184 KB |
Output is correct |
| 54 |
Correct |
100 ms |
4688 KB |
Output is correct |
| 55 |
Correct |
109 ms |
4852 KB |
Output is correct |
| 56 |
Correct |
172 ms |
4700 KB |
Output is correct |
| 57 |
Correct |
113 ms |
5468 KB |
Output is correct |
| 58 |
Correct |
105 ms |
5204 KB |
Output is correct |
| 59 |
Correct |
209 ms |
5460 KB |
Output is correct |
| 60 |
Correct |
141 ms |
5980 KB |
Output is correct |
| 61 |
Correct |
112 ms |
5980 KB |
Output is correct |
| 62 |
Correct |
228 ms |
5972 KB |
Output is correct |
| 63 |
Correct |
313 ms |
5972 KB |
Output is correct |
| 64 |
Correct |
394 ms |
5868 KB |
Output is correct |
| 65 |
Correct |
337 ms |
5980 KB |
Output is correct |
| 66 |
Correct |
319 ms |
5976 KB |
Output is correct |
| 67 |
Correct |
320 ms |
6100 KB |
Output is correct |
| 68 |
Correct |
300 ms |
5912 KB |
Output is correct |
| 69 |
Correct |
331 ms |
6224 KB |
Output is correct |
| 70 |
Correct |
295 ms |
6124 KB |
Output is correct |
| 71 |
Correct |
312 ms |
6132 KB |
Output is correct |
| 72 |
Correct |
288 ms |
5972 KB |
Output is correct |
| 73 |
Correct |
301 ms |
6224 KB |
Output is correct |
| 74 |
Correct |
266 ms |
6304 KB |
Output is correct |
| 75 |
Correct |
297 ms |
6228 KB |
Output is correct |
| 76 |
Correct |
278 ms |
6468 KB |
Output is correct |
| 77 |
Correct |
276 ms |
6224 KB |
Output is correct |
| 78 |
Correct |
308 ms |
6228 KB |
Output is correct |
| 79 |
Correct |
259 ms |
6224 KB |
Output is correct |
| 80 |
Correct |
281 ms |
6228 KB |
Output is correct |
| 81 |
Correct |
276 ms |
6480 KB |
Output is correct |
| 82 |
Correct |
264 ms |
6224 KB |
Output is correct |
| 83 |
Correct |
280 ms |
6236 KB |
Output is correct |
| 84 |
Correct |
276 ms |
6316 KB |
Output is correct |
| 85 |
Correct |
302 ms |
6224 KB |
Output is correct |
| 86 |
Correct |
279 ms |
6480 KB |
Output is correct |
| 87 |
Correct |
288 ms |
6096 KB |
Output is correct |
| 88 |
Correct |
293 ms |
6360 KB |
Output is correct |
| 89 |
Correct |
286 ms |
6204 KB |
Output is correct |
| 90 |
Correct |
277 ms |
6252 KB |
Output is correct |
| 91 |
Correct |
281 ms |
6232 KB |
Output is correct |
| 92 |
Correct |
291 ms |
6028 KB |
Output is correct |
