# |
Submission time |
Handle |
Problem |
Language |
Result |
Execution time |
Memory |
958043 |
2024-04-04T18:08:42 Z |
theehann |
Mecho (IOI09_mecho) |
C++17 |
|
155 ms |
11964 KB |
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
#define int ll
#define ft first
#define se second
#define NAME "A"
#define file freopen(NAME".INP","r",stdin); freopen(NAME".OUT","w",stdout);
#define sdf ios::sync_with_stdio(0); cin.tie(0); cout.tie(0);
const int MOD = 1e9 + 7;
const int N = 800 + 5, INF = 1e15;
int dx[4] = {0, 0, -1, 1};
int dy[4] = {-1, 1, 0, 0};
char a[N][N];
int dis[N][N], vis[N][N] = {INF};
bool f = false;
int n, step, homex, homey, mx, my;
bool bfs(int len, int x, int y){
vis[x][y] = len;
queue<tuple<int, int, int>> q;
q.push({x, y, 0});
while(!q.empty()){
const auto [sx, sy, cur] = q.front(); q.pop();
int dist = (cur + 1) / step;
for(int i = 0;i < 4;++i){
int u = sx + dx[i], v = sy + dy[i];
if(u < 1 || v < 1 || v > n || u > n) continue;
if(a[u][v] == 'G' && (cur + 1) < vis[u][v] && dist < dis[u][v] - (len / step)){
vis[u][v] = cur + 1;
q.push({u, v, cur + 1});
}
}
}
for(int i = 0;i < 4;++i){
int u = homex + dx[i], v = homey + dy[i];
if(vis[u][v] != INF && a[u][v] == 'G' && vis[u][v] / step < dis[u][v] - (len / step)){
return true;
}
}
return false;
}
int32_t main(){
sdf
cin >> n >> step;
queue<pair<int, int>> q;
for(int i = 1;i <= n;++i){
for(int j = 1;j <= n;++j){
cin >> a[i][j];
dis[i][j] = INF;
if(a[i][j] == 'H'){
q.push({i, j});
dis[i][j] = 0;
}
else if(a[i][j] == 'D'){
homex = i; homey = j;
}
else if(a[i][j] == 'M'){
mx = i; my = j;
}
}
}
while(!q.empty()){
const auto [x, y] = q.front(); q.pop();
for(int i = 0;i < 4;++i){
int u = x + dx[i];
int v = y + dy[i];
if(u < 1 || v < 1 || u > n || v > n) continue;
if(dis[u][v] == INF && (a[u][v] == 'G' || a[u][v] == 'M')){
dis[u][v] = dis[x][y] + 1;
q.push({u, v});
}
}
}
int l = 1, r = INF;
int ans =0;
while(l <= r){
int mid = (l + r) / 2;
for(int i = 1;i <= n;++i){
for(int j = 1;j <= n;++j){
vis[i][j] = INF;
}
}
if(bfs(mid * step, mx, my)){
l = mid + 1;
ans = mid;
}
else{
r = mid - 1;
}
}
cout << ((ans >= 1) ? ans : -1) ;
return 0;
}
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1 ms |
2392 KB |
Output is correct |
2 |
Correct |
1 ms |
2392 KB |
Output is correct |
3 |
Correct |
1 ms |
2392 KB |
Output is correct |
4 |
Correct |
1 ms |
2396 KB |
Output is correct |
5 |
Incorrect |
1 ms |
2392 KB |
Output isn't correct |
6 |
Correct |
1 ms |
2396 KB |
Output is correct |
7 |
Correct |
74 ms |
11424 KB |
Output is correct |
8 |
Correct |
1 ms |
2652 KB |
Output is correct |
9 |
Correct |
1 ms |
2652 KB |
Output is correct |
10 |
Correct |
1 ms |
2396 KB |
Output is correct |
11 |
Correct |
1 ms |
2652 KB |
Output is correct |
12 |
Incorrect |
1 ms |
2904 KB |
Output isn't correct |
13 |
Incorrect |
1 ms |
2908 KB |
Output isn't correct |
14 |
Correct |
1 ms |
2908 KB |
Output is correct |
15 |
Correct |
1 ms |
2652 KB |
Output is correct |
16 |
Correct |
1 ms |
2652 KB |
Output is correct |
17 |
Correct |
1 ms |
2652 KB |
Output is correct |
18 |
Correct |
1 ms |
2652 KB |
Output is correct |
19 |
Correct |
1 ms |
2652 KB |
Output is correct |
20 |
Correct |
1 ms |
2904 KB |
Output is correct |
21 |
Correct |
1 ms |
2652 KB |
Output is correct |
22 |
Correct |
1 ms |
2904 KB |
Output is correct |
23 |
Correct |
1 ms |
2904 KB |
Output is correct |
24 |
Correct |
1 ms |
2904 KB |
Output is correct |
25 |
Correct |
1 ms |
2904 KB |
Output is correct |
26 |
Correct |
1 ms |
2908 KB |
Output is correct |
27 |
Correct |
1 ms |
2908 KB |
Output is correct |
28 |
Correct |
1 ms |
2908 KB |
Output is correct |
29 |
Correct |
2 ms |
3164 KB |
Output is correct |
30 |
Correct |
1 ms |
3164 KB |
Output is correct |
31 |
Correct |
1 ms |
3164 KB |
Output is correct |
32 |
Correct |
1 ms |
3164 KB |
Output is correct |
33 |
Correct |
6 ms |
8028 KB |
Output is correct |
34 |
Correct |
7 ms |
8028 KB |
Output is correct |
35 |
Correct |
20 ms |
8024 KB |
Output is correct |
36 |
Correct |
11 ms |
8280 KB |
Output is correct |
37 |
Correct |
8 ms |
8284 KB |
Output is correct |
38 |
Correct |
25 ms |
8404 KB |
Output is correct |
39 |
Correct |
10 ms |
8540 KB |
Output is correct |
40 |
Correct |
10 ms |
8536 KB |
Output is correct |
41 |
Correct |
32 ms |
8752 KB |
Output is correct |
42 |
Correct |
11 ms |
9048 KB |
Output is correct |
43 |
Correct |
11 ms |
9052 KB |
Output is correct |
44 |
Correct |
40 ms |
9052 KB |
Output is correct |
45 |
Correct |
13 ms |
9308 KB |
Output is correct |
46 |
Correct |
14 ms |
9388 KB |
Output is correct |
47 |
Correct |
49 ms |
9308 KB |
Output is correct |
48 |
Correct |
15 ms |
9564 KB |
Output is correct |
49 |
Correct |
16 ms |
9676 KB |
Output is correct |
50 |
Correct |
54 ms |
9816 KB |
Output is correct |
51 |
Correct |
18 ms |
10076 KB |
Output is correct |
52 |
Correct |
20 ms |
10164 KB |
Output is correct |
53 |
Correct |
70 ms |
10076 KB |
Output is correct |
54 |
Correct |
19 ms |
10328 KB |
Output is correct |
55 |
Correct |
20 ms |
10524 KB |
Output is correct |
56 |
Correct |
78 ms |
10520 KB |
Output is correct |
57 |
Correct |
22 ms |
10844 KB |
Output is correct |
58 |
Correct |
23 ms |
10844 KB |
Output is correct |
59 |
Correct |
86 ms |
10868 KB |
Output is correct |
60 |
Correct |
26 ms |
11200 KB |
Output is correct |
61 |
Correct |
26 ms |
11100 KB |
Output is correct |
62 |
Correct |
97 ms |
11220 KB |
Output is correct |
63 |
Incorrect |
84 ms |
11204 KB |
Output isn't correct |
64 |
Correct |
155 ms |
11204 KB |
Output is correct |
65 |
Correct |
154 ms |
11600 KB |
Output is correct |
66 |
Correct |
112 ms |
11212 KB |
Output is correct |
67 |
Correct |
101 ms |
11208 KB |
Output is correct |
68 |
Incorrect |
50 ms |
11264 KB |
Output isn't correct |
69 |
Correct |
53 ms |
11092 KB |
Output is correct |
70 |
Correct |
45 ms |
11100 KB |
Output is correct |
71 |
Correct |
47 ms |
11100 KB |
Output is correct |
72 |
Incorrect |
38 ms |
11100 KB |
Output isn't correct |
73 |
Incorrect |
41 ms |
11608 KB |
Output isn't correct |
74 |
Correct |
57 ms |
11560 KB |
Output is correct |
75 |
Correct |
76 ms |
11764 KB |
Output is correct |
76 |
Correct |
58 ms |
11756 KB |
Output is correct |
77 |
Correct |
58 ms |
11556 KB |
Output is correct |
78 |
Correct |
60 ms |
11608 KB |
Output is correct |
79 |
Correct |
52 ms |
11612 KB |
Output is correct |
80 |
Correct |
56 ms |
11612 KB |
Output is correct |
81 |
Correct |
60 ms |
11608 KB |
Output is correct |
82 |
Correct |
52 ms |
11700 KB |
Output is correct |
83 |
Incorrect |
64 ms |
11620 KB |
Output isn't correct |
84 |
Correct |
72 ms |
11616 KB |
Output is correct |
85 |
Correct |
75 ms |
11964 KB |
Output is correct |
86 |
Correct |
67 ms |
11604 KB |
Output is correct |
87 |
Correct |
66 ms |
11612 KB |
Output is correct |
88 |
Incorrect |
71 ms |
11352 KB |
Output isn't correct |
89 |
Correct |
70 ms |
11352 KB |
Output is correct |
90 |
Correct |
74 ms |
11524 KB |
Output is correct |
91 |
Correct |
65 ms |
11356 KB |
Output is correct |
92 |
Correct |
71 ms |
11368 KB |
Output is correct |