| # |
Submission time |
Handle |
Problem |
Language |
Result |
Execution time |
Memory |
| 366948 |
2021-02-15T19:05:20 Z |
kostia244 |
Mecho (IOI09_mecho) |
C++17 |
|
231 ms |
6508 KB |
#pragma GCC optimize("Ofast,unroll-loops")
#pragma GCC target("avx,avx2,sse,sse2")
#include<bits/stdc++.h>
#define all(x) begin(x), end(x)
using namespace std;
const int maxn = 808, C = 1;
using ll = long long;
int n, s;
char c[maxn][maxn];
array<int, 2> st, en;
int bdi[maxn][maxn];
vector<array<int, 2>> d {{1, 0}, {-1, 0}, {0, -1}, {0, 1}};
bool good(int x, int y) {
return !(min(x, y) < 1 || max(x, y) > n) && c[x][y] != 'T';
}
void bees() {
memset(bdi, -1, sizeof bdi);
queue<array<int, 2>> q;
auto add = [&](int x, int y, int d) {
if(bdi[x][y] >= 0) return;
if(c[x][y] == 'D') return;
bdi[x][y] = d;
q.push({x, y});
};
for(int i = 1; i <= n; i++)
for(int j = 1; j <= n; j++)
if(c[i][j] == 'H') add(i, j, 0);
while(!q.empty()) {
auto [x, y] = q.front(); q.pop();
for(auto [dx, dy] : d) {
int tx = x+dx, ty = y+dy;
if(good(tx, ty)) add(tx, ty, bdi[x][y]+1);
}
}
}
int dist[maxn][maxn];
bool check(int ti) {
queue<array<int, 2>> q;
memset(dist, -1, sizeof dist);
auto add = [&](int x, int y, int d) {
if(dist[x][y] >= 0) return;
//cout << x << " " << y << " " << d << " | " << bdi[x][y] << endl;
if(bdi[x][y] != -1 && ti + (d/s) >= bdi[x][y]) return;
dist[x][y] = d;
q.push({x, y});
};
add(st[0], st[1], 0);
while(!q.empty()) {
auto [x, y] = q.front(); q.pop();
for(auto [dx, dy] : d) {
int tx = x+dx, ty = y+dy;
if(good(tx, ty)) add(tx, ty, dist[x][y]+1);
}
}
return dist[en[0]][en[1]] >= 0;
}
int main() {
cin.tie(0)->sync_with_stdio(0);
cin >> n >> s;
for(int i = 1; i <= n; i++)
for(int j = 1; j <= n; j++) {
cin >> c[i][j];
if(c[i][j] == 'M') st = {i, j};
if(c[i][j] == 'D') en = {i, j};
}
bees();
if(!check(0)) return cout << -1, 0;
int ans = 0;
for(int i = 1<<20; i>>=1;) ans += i*check(ans+i);
cout << ans << '\n';
}
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
5 ms |
5484 KB |
Output is correct |
| 2 |
Correct |
5 ms |
5484 KB |
Output is correct |
| 3 |
Correct |
5 ms |
5484 KB |
Output is correct |
| 4 |
Correct |
5 ms |
5484 KB |
Output is correct |
| 5 |
Correct |
5 ms |
5484 KB |
Output is correct |
| 6 |
Correct |
5 ms |
5484 KB |
Output is correct |
| 7 |
Correct |
172 ms |
6252 KB |
Output is correct |
| 8 |
Correct |
3 ms |
5484 KB |
Output is correct |
| 9 |
Correct |
5 ms |
5484 KB |
Output is correct |
| 10 |
Correct |
5 ms |
5484 KB |
Output is correct |
| 11 |
Correct |
6 ms |
5484 KB |
Output is correct |
| 12 |
Correct |
7 ms |
5484 KB |
Output is correct |
| 13 |
Correct |
5 ms |
5484 KB |
Output is correct |
| 14 |
Correct |
3 ms |
5484 KB |
Output is correct |
| 15 |
Correct |
5 ms |
5484 KB |
Output is correct |
| 16 |
Correct |
5 ms |
5484 KB |
Output is correct |
| 17 |
Correct |
5 ms |
5484 KB |
Output is correct |
| 18 |
Correct |
5 ms |
5484 KB |
Output is correct |
| 19 |
Correct |
5 ms |
5484 KB |
Output is correct |
| 20 |
Correct |
5 ms |
5484 KB |
Output is correct |
| 21 |
Correct |
6 ms |
5484 KB |
Output is correct |
| 22 |
Correct |
5 ms |
5484 KB |
Output is correct |
| 23 |
Correct |
5 ms |
5484 KB |
Output is correct |
| 24 |
Correct |
6 ms |
5484 KB |
Output is correct |
| 25 |
Correct |
6 ms |
5484 KB |
Output is correct |
| 26 |
Correct |
5 ms |
5484 KB |
Output is correct |
| 27 |
Correct |
5 ms |
5484 KB |
Output is correct |
| 28 |
Correct |
5 ms |
5484 KB |
Output is correct |
| 29 |
Correct |
5 ms |
5484 KB |
Output is correct |
| 30 |
Correct |
5 ms |
5484 KB |
Output is correct |
| 31 |
Correct |
5 ms |
5484 KB |
Output is correct |
| 32 |
Correct |
5 ms |
5484 KB |
Output is correct |
| 33 |
Correct |
11 ms |
5740 KB |
Output is correct |
| 34 |
Correct |
12 ms |
5740 KB |
Output is correct |
| 35 |
Correct |
43 ms |
5740 KB |
Output is correct |
| 36 |
Correct |
12 ms |
5868 KB |
Output is correct |
| 37 |
Correct |
13 ms |
5740 KB |
Output is correct |
| 38 |
Correct |
53 ms |
5740 KB |
Output is correct |
| 39 |
Correct |
14 ms |
5868 KB |
Output is correct |
| 40 |
Correct |
16 ms |
5868 KB |
Output is correct |
| 41 |
Correct |
74 ms |
5868 KB |
Output is correct |
| 42 |
Correct |
19 ms |
5996 KB |
Output is correct |
| 43 |
Correct |
21 ms |
5868 KB |
Output is correct |
| 44 |
Correct |
85 ms |
5868 KB |
Output is correct |
| 45 |
Correct |
18 ms |
5868 KB |
Output is correct |
| 46 |
Correct |
22 ms |
5868 KB |
Output is correct |
| 47 |
Correct |
110 ms |
5868 KB |
Output is correct |
| 48 |
Correct |
20 ms |
5868 KB |
Output is correct |
| 49 |
Correct |
24 ms |
5996 KB |
Output is correct |
| 50 |
Correct |
154 ms |
5996 KB |
Output is correct |
| 51 |
Correct |
24 ms |
5996 KB |
Output is correct |
| 52 |
Correct |
27 ms |
5996 KB |
Output is correct |
| 53 |
Correct |
147 ms |
6124 KB |
Output is correct |
| 54 |
Correct |
28 ms |
5996 KB |
Output is correct |
| 55 |
Correct |
33 ms |
5996 KB |
Output is correct |
| 56 |
Correct |
180 ms |
5956 KB |
Output is correct |
| 57 |
Correct |
28 ms |
5996 KB |
Output is correct |
| 58 |
Correct |
33 ms |
5996 KB |
Output is correct |
| 59 |
Correct |
209 ms |
5996 KB |
Output is correct |
| 60 |
Correct |
31 ms |
6124 KB |
Output is correct |
| 61 |
Correct |
36 ms |
6124 KB |
Output is correct |
| 62 |
Correct |
231 ms |
6252 KB |
Output is correct |
| 63 |
Correct |
147 ms |
6272 KB |
Output is correct |
| 64 |
Correct |
218 ms |
6032 KB |
Output is correct |
| 65 |
Correct |
215 ms |
6124 KB |
Output is correct |
| 66 |
Correct |
197 ms |
6252 KB |
Output is correct |
| 67 |
Correct |
46 ms |
6124 KB |
Output is correct |
| 68 |
Correct |
63 ms |
6176 KB |
Output is correct |
| 69 |
Correct |
61 ms |
6124 KB |
Output is correct |
| 70 |
Correct |
61 ms |
6172 KB |
Output is correct |
| 71 |
Correct |
52 ms |
6124 KB |
Output is correct |
| 72 |
Correct |
48 ms |
6124 KB |
Output is correct |
| 73 |
Correct |
65 ms |
6380 KB |
Output is correct |
| 74 |
Correct |
131 ms |
6380 KB |
Output is correct |
| 75 |
Correct |
126 ms |
6508 KB |
Output is correct |
| 76 |
Correct |
121 ms |
6380 KB |
Output is correct |
| 77 |
Correct |
121 ms |
6380 KB |
Output is correct |
| 78 |
Correct |
50 ms |
6380 KB |
Output is correct |
| 79 |
Correct |
112 ms |
6380 KB |
Output is correct |
| 80 |
Correct |
121 ms |
6380 KB |
Output is correct |
| 81 |
Correct |
131 ms |
6508 KB |
Output is correct |
| 82 |
Correct |
115 ms |
6380 KB |
Output is correct |
| 83 |
Correct |
153 ms |
6252 KB |
Output is correct |
| 84 |
Correct |
148 ms |
6508 KB |
Output is correct |
| 85 |
Correct |
134 ms |
6380 KB |
Output is correct |
| 86 |
Correct |
147 ms |
6252 KB |
Output is correct |
| 87 |
Correct |
160 ms |
6252 KB |
Output is correct |
| 88 |
Correct |
151 ms |
6380 KB |
Output is correct |
| 89 |
Correct |
176 ms |
6308 KB |
Output is correct |
| 90 |
Correct |
164 ms |
6252 KB |
Output is correct |
| 91 |
Correct |
189 ms |
6380 KB |
Output is correct |
| 92 |
Correct |
159 ms |
6252 KB |
Output is correct |
