| # |
Submission time |
Handle |
Problem |
Language |
Result |
Execution time |
Memory |
| 972931 |
2024-05-01T10:28:48 Z |
jadai007 |
Mecho (IOI09_mecho) |
C++17 |
|
154 ms |
7048 KB |
#include <bits/stdc++.h>
using namespace std;
const int MAX_N = 810, INF = 1e9 + 7, d[4][2] = {{1, 0}, {0, 1}, {-1, 0}, {0, -1}};
char s[MAX_N][MAX_N];
int bee[MAX_N][MAX_N], bear[MAX_N][MAX_N], sx, sy, ex, ey;
queue<pair<int, int>> q;
int main() {
cin.tie(nullptr)->sync_with_stdio(false);
int N, S;
cin >> N >> S;
for(int i = 1; i <= N; i++) cin >> (s[i] + 1);
for(int i = 1; i <= N; i++) {
for(int j = 1; j <= N; j++) {
bee[i][j] = INF;
if(s[i][j] == 'H') {
bee[i][j] = 0;
q.emplace(i, j);
}
else if(s[i][j] == 'M') sx = i, sy = j;
else if(s[i][j] == 'D') ex = i, ey = j;
}
}
while(!q.empty()) {
int ux = q.front().first, uy = q.front().second; q.pop();
for(int i = 0; i < 4; i++) {
int vx = ux + d[i][0], vy = uy + d[i][1];
if(vx < 1 || vx > N || vy < 1 || vy > N || s[vx][vy] == 'T' || s[vx][vy] == 'D' || bee[vx][vy] != INF) continue;
bee[vx][vy] = bee[ux][uy] + 1;
q.emplace(vx, vy);
}
}
int l = 0, r = N * N, ans = -1;
while(l <= r) {
int mid = (l + r) / 2;
for(int i = 1; i <= N; i++) for(int j = 1; j <= N; j++) bear[i][j] = INF;
if(bee[sx][sy] > mid) {
q.emplace(sx, sy);
bear[sx][sy] = 0;
}
while(!q.empty()) {
int ux = q.front().first, uy = q.front().second; q.pop();
for(int i = 0; i < 4; i++) {
int vx = ux + d[i][0], vy = uy + d[i][1];
if(vx < 1 || vx > N || vy < 1 || vy > N || s[vx][vy] == 'T' || bear[vx][vy] != INF) continue;
if((bear[ux][uy] + 1) / S >= bee[vx][vy] - mid) continue;
bear[vx][vy] = bear[ux][uy] + 1;
q.emplace(vx, vy);
}
}
if(bear[ex][ey] == INF) r = mid - 1;
else{
l = mid + 1;
ans = mid;
}
}
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 |
2392 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 |
Correct |
70 ms |
6352 KB |
Output is correct |
| 8 |
Correct |
1 ms |
2392 KB |
Output is correct |
| 9 |
Correct |
1 ms |
2504 KB |
Output is correct |
| 10 |
Correct |
1 ms |
2512 KB |
Output is correct |
| 11 |
Correct |
1 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 |
4696 KB |
Output is correct |
| 15 |
Correct |
1 ms |
2516 KB |
Output is correct |
| 16 |
Correct |
1 ms |
2508 KB |
Output is correct |
| 17 |
Correct |
1 ms |
2548 KB |
Output is correct |
| 18 |
Correct |
1 ms |
2516 KB |
Output is correct |
| 19 |
Correct |
1 ms |
2396 KB |
Output is correct |
| 20 |
Correct |
1 ms |
2396 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 |
2508 KB |
Output is correct |
| 24 |
Correct |
1 ms |
2652 KB |
Output is correct |
| 25 |
Correct |
1 ms |
4700 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 |
4708 KB |
Output is correct |
| 30 |
Correct |
1 ms |
4700 KB |
Output is correct |
| 31 |
Correct |
1 ms |
4704 KB |
Output is correct |
| 32 |
Correct |
1 ms |
4708 KB |
Output is correct |
| 33 |
Correct |
5 ms |
4968 KB |
Output is correct |
| 34 |
Correct |
6 ms |
4964 KB |
Output is correct |
| 35 |
Correct |
14 ms |
5112 KB |
Output is correct |
| 36 |
Correct |
4 ms |
5012 KB |
Output is correct |
| 37 |
Correct |
6 ms |
5088 KB |
Output is correct |
| 38 |
Correct |
22 ms |
5148 KB |
Output is correct |
| 39 |
Correct |
7 ms |
5060 KB |
Output is correct |
| 40 |
Correct |
6 ms |
5092 KB |
Output is correct |
| 41 |
Correct |
23 ms |
5268 KB |
Output is correct |
| 42 |
Correct |
6 ms |
5268 KB |
Output is correct |
| 43 |
Correct |
7 ms |
5572 KB |
Output is correct |
| 44 |
Correct |
31 ms |
5316 KB |
Output is correct |
| 45 |
Correct |
8 ms |
5216 KB |
Output is correct |
| 46 |
Correct |
9 ms |
5220 KB |
Output is correct |
| 47 |
Correct |
33 ms |
5216 KB |
Output is correct |
| 48 |
Correct |
8 ms |
5440 KB |
Output is correct |
| 49 |
Correct |
9 ms |
5548 KB |
Output is correct |
| 50 |
Correct |
38 ms |
5476 KB |
Output is correct |
| 51 |
Correct |
10 ms |
5732 KB |
Output is correct |
| 52 |
Correct |
11 ms |
5752 KB |
Output is correct |
| 53 |
Correct |
51 ms |
5932 KB |
Output is correct |
| 54 |
Correct |
11 ms |
6008 KB |
Output is correct |
| 55 |
Correct |
17 ms |
5964 KB |
Output is correct |
| 56 |
Correct |
70 ms |
5988 KB |
Output is correct |
| 57 |
Correct |
14 ms |
6144 KB |
Output is correct |
| 58 |
Correct |
14 ms |
6232 KB |
Output is correct |
| 59 |
Correct |
82 ms |
6276 KB |
Output is correct |
| 60 |
Correct |
15 ms |
6604 KB |
Output is correct |
| 61 |
Correct |
23 ms |
6684 KB |
Output is correct |
| 62 |
Correct |
84 ms |
6620 KB |
Output is correct |
| 63 |
Correct |
78 ms |
6576 KB |
Output is correct |
| 64 |
Correct |
154 ms |
6556 KB |
Output is correct |
| 65 |
Correct |
108 ms |
6596 KB |
Output is correct |
| 66 |
Correct |
89 ms |
6564 KB |
Output is correct |
| 67 |
Correct |
84 ms |
6592 KB |
Output is correct |
| 68 |
Correct |
36 ms |
6644 KB |
Output is correct |
| 69 |
Correct |
38 ms |
6548 KB |
Output is correct |
| 70 |
Correct |
28 ms |
6656 KB |
Output is correct |
| 71 |
Correct |
34 ms |
6484 KB |
Output is correct |
| 72 |
Correct |
27 ms |
6636 KB |
Output is correct |
| 73 |
Correct |
23 ms |
6872 KB |
Output is correct |
| 74 |
Correct |
47 ms |
6868 KB |
Output is correct |
| 75 |
Correct |
58 ms |
6912 KB |
Output is correct |
| 76 |
Correct |
58 ms |
6744 KB |
Output is correct |
| 77 |
Correct |
60 ms |
7048 KB |
Output is correct |
| 78 |
Correct |
73 ms |
6836 KB |
Output is correct |
| 79 |
Correct |
35 ms |
6700 KB |
Output is correct |
| 80 |
Correct |
39 ms |
6804 KB |
Output is correct |
| 81 |
Correct |
46 ms |
6816 KB |
Output is correct |
| 82 |
Correct |
59 ms |
6656 KB |
Output is correct |
| 83 |
Correct |
51 ms |
6824 KB |
Output is correct |
| 84 |
Correct |
48 ms |
6644 KB |
Output is correct |
| 85 |
Correct |
73 ms |
6812 KB |
Output is correct |
| 86 |
Correct |
48 ms |
6848 KB |
Output is correct |
| 87 |
Correct |
50 ms |
6620 KB |
Output is correct |
| 88 |
Correct |
48 ms |
6744 KB |
Output is correct |
| 89 |
Correct |
62 ms |
6556 KB |
Output is correct |
| 90 |
Correct |
57 ms |
6632 KB |
Output is correct |
| 91 |
Correct |
67 ms |
6568 KB |
Output is correct |
| 92 |
Correct |
62 ms |
6792 KB |
Output is correct |
