| # |
Submission time |
Handle |
Problem |
Language |
Result |
Execution time |
Memory |
| 777037 |
2023-07-08T14:22:26 Z |
Surver |
Mecho (IOI09_mecho) |
C++17 |
|
141 ms |
6980 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)1e9;
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' || v[x+dx[i]][y+dy[i]]=='D'){
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 |
1 ms |
212 KB |
Output is correct |
| 2 |
Incorrect |
1 ms |
212 KB |
Output isn't correct |
| 3 |
Correct |
1 ms |
212 KB |
Output is correct |
| 4 |
Incorrect |
1 ms |
212 KB |
Output isn't correct |
| 5 |
Incorrect |
1 ms |
212 KB |
Output isn't correct |
| 6 |
Incorrect |
1 ms |
320 KB |
Output isn't correct |
| 7 |
Incorrect |
89 ms |
6816 KB |
Output isn't correct |
| 8 |
Correct |
1 ms |
212 KB |
Output is correct |
| 9 |
Correct |
1 ms |
212 KB |
Output is correct |
| 10 |
Correct |
1 ms |
320 KB |
Output is correct |
| 11 |
Correct |
1 ms |
212 KB |
Output is correct |
| 12 |
Incorrect |
1 ms |
320 KB |
Output isn't correct |
| 13 |
Correct |
1 ms |
316 KB |
Output is correct |
| 14 |
Correct |
1 ms |
340 KB |
Output is correct |
| 15 |
Correct |
1 ms |
324 KB |
Output is correct |
| 16 |
Incorrect |
1 ms |
320 KB |
Output isn't correct |
| 17 |
Correct |
1 ms |
320 KB |
Output is correct |
| 18 |
Incorrect |
1 ms |
212 KB |
Output isn't correct |
| 19 |
Correct |
1 ms |
212 KB |
Output is correct |
| 20 |
Incorrect |
1 ms |
320 KB |
Output isn't correct |
| 21 |
Correct |
1 ms |
316 KB |
Output is correct |
| 22 |
Incorrect |
1 ms |
340 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 |
1 ms |
340 KB |
Output is correct |
| 26 |
Incorrect |
1 ms |
340 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 |
324 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 |
9 ms |
1556 KB |
Output is correct |
| 34 |
Incorrect |
15 ms |
1552 KB |
Output isn't correct |
| 35 |
Incorrect |
23 ms |
1564 KB |
Output isn't correct |
| 36 |
Correct |
8 ms |
1880 KB |
Output is correct |
| 37 |
Incorrect |
16 ms |
1876 KB |
Output isn't correct |
| 38 |
Incorrect |
31 ms |
2076 KB |
Output isn't correct |
| 39 |
Correct |
14 ms |
2356 KB |
Output is correct |
| 40 |
Incorrect |
22 ms |
2360 KB |
Output isn't correct |
| 41 |
Incorrect |
42 ms |
2420 KB |
Output isn't correct |
| 42 |
Correct |
11 ms |
2952 KB |
Output is correct |
| 43 |
Incorrect |
19 ms |
2944 KB |
Output isn't correct |
| 44 |
Incorrect |
55 ms |
2904 KB |
Output isn't correct |
| 45 |
Correct |
16 ms |
3444 KB |
Output is correct |
| 46 |
Incorrect |
32 ms |
3412 KB |
Output isn't correct |
| 47 |
Incorrect |
69 ms |
3428 KB |
Output isn't correct |
| 48 |
Correct |
21 ms |
4024 KB |
Output is correct |
| 49 |
Incorrect |
50 ms |
3936 KB |
Output isn't correct |
| 50 |
Incorrect |
83 ms |
4108 KB |
Output isn't correct |
| 51 |
Correct |
25 ms |
4540 KB |
Output is correct |
| 52 |
Incorrect |
59 ms |
4596 KB |
Output isn't correct |
| 53 |
Incorrect |
93 ms |
4628 KB |
Output isn't correct |
| 54 |
Correct |
35 ms |
5272 KB |
Output is correct |
| 55 |
Incorrect |
78 ms |
5244 KB |
Output isn't correct |
| 56 |
Incorrect |
107 ms |
5308 KB |
Output isn't correct |
| 57 |
Correct |
27 ms |
6024 KB |
Output is correct |
| 58 |
Incorrect |
49 ms |
5996 KB |
Output isn't correct |
| 59 |
Incorrect |
136 ms |
5996 KB |
Output isn't correct |
| 60 |
Correct |
33 ms |
6796 KB |
Output is correct |
| 61 |
Incorrect |
91 ms |
6756 KB |
Output isn't correct |
| 62 |
Incorrect |
141 ms |
6852 KB |
Output isn't correct |
| 63 |
Incorrect |
38 ms |
6804 KB |
Output isn't correct |
| 64 |
Incorrect |
43 ms |
6920 KB |
Output isn't correct |
| 65 |
Incorrect |
40 ms |
6792 KB |
Output isn't correct |
| 66 |
Incorrect |
37 ms |
6916 KB |
Output isn't correct |
| 67 |
Incorrect |
44 ms |
6804 KB |
Output isn't correct |
| 68 |
Incorrect |
42 ms |
6820 KB |
Output isn't correct |
| 69 |
Incorrect |
43 ms |
6800 KB |
Output isn't correct |
| 70 |
Incorrect |
47 ms |
6800 KB |
Output isn't correct |
| 71 |
Incorrect |
43 ms |
6800 KB |
Output isn't correct |
| 72 |
Correct |
40 ms |
6796 KB |
Output is correct |
| 73 |
Correct |
46 ms |
6928 KB |
Output is correct |
| 74 |
Correct |
66 ms |
6804 KB |
Output is correct |
| 75 |
Incorrect |
76 ms |
6780 KB |
Output isn't correct |
| 76 |
Correct |
74 ms |
6980 KB |
Output is correct |
| 77 |
Incorrect |
73 ms |
6812 KB |
Output isn't correct |
| 78 |
Correct |
78 ms |
6812 KB |
Output is correct |
| 79 |
Incorrect |
63 ms |
6796 KB |
Output isn't correct |
| 80 |
Incorrect |
66 ms |
6832 KB |
Output isn't correct |
| 81 |
Incorrect |
74 ms |
6796 KB |
Output isn't correct |
| 82 |
Incorrect |
66 ms |
6800 KB |
Output isn't correct |
| 83 |
Incorrect |
92 ms |
6864 KB |
Output isn't correct |
| 84 |
Correct |
77 ms |
6868 KB |
Output is correct |
| 85 |
Incorrect |
78 ms |
6804 KB |
Output isn't correct |
| 86 |
Incorrect |
92 ms |
6812 KB |
Output isn't correct |
| 87 |
Incorrect |
80 ms |
6816 KB |
Output isn't correct |
| 88 |
Incorrect |
83 ms |
6912 KB |
Output isn't correct |
| 89 |
Correct |
87 ms |
6796 KB |
Output is correct |
| 90 |
Incorrect |
89 ms |
6776 KB |
Output isn't correct |
| 91 |
Incorrect |
88 ms |
6796 KB |
Output isn't correct |
| 92 |
Incorrect |
86 ms |
6800 KB |
Output isn't correct |
