# |
Submission time |
Handle |
Problem |
Language |
Result |
Execution time |
Memory |
777102 |
2023-07-08T16:36:32 Z |
Surver |
Mecho (IOI09_mecho) |
C++17 |
|
177 ms |
6248 KB |
#include<bits/stdc++.h>
using namespace std;
void solve(){
int n,s;
cin>>n>>s;
vector<string> v(n);
for (int i=0;i<n;i++){
cin>>v[i];
}
int inf=(int)1e5;
vector<vector<int>> dis(n,vector<int>(n,inf));
queue<pair<int,int>> q;
pair<int,int> start={-1,-1};
pair<int,int> end={-1,-1};
for (int i=0;i<n;i++){
for (int j=0;j<n;j++){
if (v[i][j]=='H'){
q.push({i,j});
dis[i][j]=0;
}
if (v[i][j]=='M'){
start={i,j};
}
if (v[i][j]=='D'){
end={i,j};
}
}
}
auto valid = [&] (int x,int y){
return x>=0 && x<n && y>=0 && y<n;
};
vector<int> dx={0,-1,0,1};
vector<int> dy={-1,0,1,0};
while(!q.empty()){
auto [x,y]=q.front();
q.pop();
for (int i=0;i<4;i++){
if (valid(x+dx[i],y+dy[i]) && dis[x+dx[i]][y+dy[i]]==inf){
if (v[x+dx[i]][y+dy[i]]=='G'){
dis[x+dx[i]][y+dy[i]]=1+dis[x][y];
q.push({x+dx[i],y+dy[i]});
}
if (v[x+dx[i]][y+dy[i]]=='M'){
dis[x+dx[i]][y+dy[i]]=1+dis[x][y];
}
}
}
}
int low=0,high=inf;
int ans=-1;
while(low<=high){
int mid=(low+high)/2;
vector<vector<int>> dis2(n,vector<int>(n,inf));
q.push(start);
if (mid>=dis[start.first][start.second]){
q.pop();
}
dis2[start.first][start.second]=mid*s;
while(!q.empty()){
auto [x,y]=q.front();
q.pop();
for (int i=0;i<4;i++){
if (valid(x+dx[i],y+dy[i])){
if ((dis2[x][y]+1)/s<dis[x+dx[i]][y+dy[i]] && dis2[x+dx[i]][y+dy[i]]==inf){
dis2[x+dx[i]][y+dy[i]]=1+dis2[x][y];
q.push({x+dx[i],y+dy[i]});
}
}
}
}
if (dis2[end.first][end.second]==inf){
high=mid-1;
}
else{
ans=max(ans,mid);
low=mid+1;
}
}
cout<<ans<<"\n";
}
int32_t main(){
ios::sync_with_stdio(0);
cin.tie(0);
int t=1;
while(t--){
solve();
}
return 0;
}
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
0 ms |
212 KB |
Output is correct |
2 |
Correct |
0 ms |
212 KB |
Output is correct |
3 |
Correct |
0 ms |
212 KB |
Output is correct |
4 |
Correct |
0 ms |
212 KB |
Output is correct |
5 |
Incorrect |
1 ms |
212 KB |
Output isn't correct |
6 |
Correct |
0 ms |
212 KB |
Output is correct |
7 |
Correct |
83 ms |
6124 KB |
Output is correct |
8 |
Correct |
0 ms |
212 KB |
Output is correct |
9 |
Correct |
0 ms |
212 KB |
Output is correct |
10 |
Correct |
1 ms |
212 KB |
Output is correct |
11 |
Correct |
0 ms |
212 KB |
Output is correct |
12 |
Correct |
1 ms |
340 KB |
Output is correct |
13 |
Correct |
1 ms |
340 KB |
Output is correct |
14 |
Incorrect |
1 ms |
340 KB |
Output isn't correct |
15 |
Correct |
1 ms |
212 KB |
Output is correct |
16 |
Incorrect |
1 ms |
212 KB |
Output isn't correct |
17 |
Correct |
0 ms |
212 KB |
Output is correct |
18 |
Incorrect |
0 ms |
212 KB |
Output isn't correct |
19 |
Correct |
0 ms |
212 KB |
Output is correct |
20 |
Incorrect |
0 ms |
212 KB |
Output isn't correct |
21 |
Correct |
0 ms |
340 KB |
Output is correct |
22 |
Incorrect |
1 ms |
212 KB |
Output isn't correct |
23 |
Correct |
1 ms |
340 KB |
Output is correct |
24 |
Incorrect |
1 ms |
340 KB |
Output isn't correct |
25 |
Correct |
0 ms |
340 KB |
Output is correct |
26 |
Incorrect |
1 ms |
276 KB |
Output isn't correct |
27 |
Correct |
1 ms |
340 KB |
Output is correct |
28 |
Incorrect |
1 ms |
340 KB |
Output isn't correct |
29 |
Correct |
1 ms |
340 KB |
Output is correct |
30 |
Incorrect |
1 ms |
340 KB |
Output isn't correct |
31 |
Correct |
1 ms |
340 KB |
Output is correct |
32 |
Incorrect |
1 ms |
340 KB |
Output isn't correct |
33 |
Correct |
5 ms |
1428 KB |
Output is correct |
34 |
Incorrect |
10 ms |
1432 KB |
Output isn't correct |
35 |
Incorrect |
22 ms |
1444 KB |
Output isn't correct |
36 |
Correct |
7 ms |
1748 KB |
Output is correct |
37 |
Incorrect |
14 ms |
1860 KB |
Output isn't correct |
38 |
Incorrect |
42 ms |
2052 KB |
Output isn't correct |
39 |
Incorrect |
12 ms |
2156 KB |
Output isn't correct |
40 |
Incorrect |
27 ms |
2160 KB |
Output isn't correct |
41 |
Incorrect |
41 ms |
2184 KB |
Output isn't correct |
42 |
Incorrect |
28 ms |
2616 KB |
Output isn't correct |
43 |
Incorrect |
27 ms |
2664 KB |
Output isn't correct |
44 |
Incorrect |
53 ms |
2592 KB |
Output isn't correct |
45 |
Incorrect |
45 ms |
3076 KB |
Output isn't correct |
46 |
Incorrect |
43 ms |
3084 KB |
Output isn't correct |
47 |
Incorrect |
61 ms |
3076 KB |
Output isn't correct |
48 |
Incorrect |
64 ms |
3648 KB |
Output isn't correct |
49 |
Incorrect |
43 ms |
3568 KB |
Output isn't correct |
50 |
Incorrect |
73 ms |
3608 KB |
Output isn't correct |
51 |
Incorrect |
81 ms |
4132 KB |
Output isn't correct |
52 |
Incorrect |
72 ms |
4112 KB |
Output isn't correct |
53 |
Incorrect |
87 ms |
4156 KB |
Output isn't correct |
54 |
Incorrect |
102 ms |
4740 KB |
Output isn't correct |
55 |
Incorrect |
111 ms |
4748 KB |
Output isn't correct |
56 |
Incorrect |
101 ms |
4780 KB |
Output isn't correct |
57 |
Incorrect |
123 ms |
5392 KB |
Output isn't correct |
58 |
Incorrect |
147 ms |
5444 KB |
Output isn't correct |
59 |
Incorrect |
121 ms |
5420 KB |
Output isn't correct |
60 |
Incorrect |
144 ms |
6092 KB |
Output isn't correct |
61 |
Incorrect |
177 ms |
6092 KB |
Output isn't correct |
62 |
Incorrect |
145 ms |
6116 KB |
Output isn't correct |
63 |
Incorrect |
34 ms |
6160 KB |
Output isn't correct |
64 |
Incorrect |
39 ms |
6116 KB |
Output isn't correct |
65 |
Incorrect |
36 ms |
6136 KB |
Output isn't correct |
66 |
Incorrect |
32 ms |
6120 KB |
Output isn't correct |
67 |
Incorrect |
40 ms |
6124 KB |
Output isn't correct |
68 |
Incorrect |
30 ms |
6140 KB |
Output isn't correct |
69 |
Incorrect |
34 ms |
6140 KB |
Output isn't correct |
70 |
Incorrect |
35 ms |
6136 KB |
Output isn't correct |
71 |
Incorrect |
34 ms |
6136 KB |
Output isn't correct |
72 |
Correct |
29 ms |
6148 KB |
Output is correct |
73 |
Correct |
38 ms |
6156 KB |
Output is correct |
74 |
Incorrect |
26 ms |
6168 KB |
Output isn't correct |
75 |
Incorrect |
26 ms |
6136 KB |
Output isn't correct |
76 |
Incorrect |
27 ms |
6152 KB |
Output isn't correct |
77 |
Incorrect |
26 ms |
6156 KB |
Output isn't correct |
78 |
Incorrect |
25 ms |
6132 KB |
Output isn't correct |
79 |
Incorrect |
26 ms |
6152 KB |
Output isn't correct |
80 |
Incorrect |
28 ms |
6164 KB |
Output isn't correct |
81 |
Incorrect |
26 ms |
6164 KB |
Output isn't correct |
82 |
Incorrect |
25 ms |
6148 KB |
Output isn't correct |
83 |
Incorrect |
25 ms |
6148 KB |
Output isn't correct |
84 |
Incorrect |
25 ms |
6164 KB |
Output isn't correct |
85 |
Incorrect |
38 ms |
6160 KB |
Output isn't correct |
86 |
Incorrect |
25 ms |
6172 KB |
Output isn't correct |
87 |
Incorrect |
25 ms |
6140 KB |
Output isn't correct |
88 |
Incorrect |
26 ms |
6148 KB |
Output isn't correct |
89 |
Incorrect |
47 ms |
6248 KB |
Output isn't correct |
90 |
Incorrect |
25 ms |
6148 KB |
Output isn't correct |
91 |
Incorrect |
26 ms |
6204 KB |
Output isn't correct |
92 |
Incorrect |
25 ms |
6188 KB |
Output isn't correct |