| # |
Submission time |
Handle |
Problem |
Language |
Result |
Execution time |
Memory |
| 960603 |
2024-04-10T16:45:47 Z |
htphong0909 |
Mecho (IOI09_mecho) |
C++17 |
|
137 ms |
15368 KB |
#include<bits/stdc++.h>
using namespace std;
#define fi first
#define se second
using ll = long long;
using ii = pair<int, int>;
const int N = 1e6+5;
const int INF = 1e9;
ll d[1000][1000],m[1000][1000],n,s;
char a[1000][1000];
ll dx[4]={1,0,0,-1};
ll dy[4]={0,1,-1,0};
ii pos,h;
bool bfs(ll x) {
if (d[pos.fi][pos.se] - x * s <= 0) return 0;
queue<ii> q;
q.push(pos);
for(int i=0;i<n;i++) {
for(int j=0;j<n;j++) {
m[i][j]=0;
}
}
while(!q.empty()) {
ii u=q.front();
q.pop();
for(int i=0;i<4;i++) {
ii v={u.fi+dx[i],u.se+dy[i]};
if(v.fi<0 || v.fi>=n || v.se<0 || v.se>=n) continue;
if(m[v.fi][v.se]==0 && a[v.fi][v.se]!='T' &&
d[v.fi][v.se]-x*s>m[u.fi][u.se]+1 && a[v.fi][v.se]!='M') {
m[v.fi][v.se]=m[u.fi][u.se]+1;
q.push(v);
}
}
}
if(m[h.fi][h.se]>0) return 1; else return 0;
}
int main()
{
ios_base::sync_with_stdio(false);
cin.tie(NULL);
queue<ii> q;
cin >> n >> s;
for(int i=0;i<n;i++) {
for(int j=0;j<n;j++) {
cin >> a[i][j];
if(a[i][j]=='H') {
q.push({i,j});
}
if(a[i][j]=='M') pos={i,j};
if(a[i][j]=='D') h={i,j};
}
}
while(!q.empty()) {
ii u=q.front();
q.pop();
for(int i=0;i<4;i++) {
ii v={u.fi+dx[i],u.se+dy[i]};
if(v.fi<0 || v.fi>=n || v.se<0 || v.se>=n) continue;
if(d[v.fi][v.se]==0 && a[v.fi][v.se]!='T' && a[v.fi][v.se]!='H' && a[v.fi][v.se]!='D') {
d[v.fi][v.se]=d[u.fi][u.se]+s;
q.push(v);
}
}
}
d[h.fi][h.se] = INF;
ll l=0,r=99999999,ans=-1;
while(l<=r) {
ll m=(l+r)/2;
if(bfs(m)) {
ans=m;
l=m+1;
}
else {
r=m-1;
}
}
cout << ans;
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 |
2396 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 |
49 ms |
15196 KB |
Output is correct |
| 8 |
Correct |
1 ms |
2396 KB |
Output is correct |
| 9 |
Correct |
2 ms |
2396 KB |
Output is correct |
| 10 |
Correct |
1 ms |
2396 KB |
Output is correct |
| 11 |
Correct |
1 ms |
2396 KB |
Output is correct |
| 12 |
Correct |
1 ms |
2648 KB |
Output is correct |
| 13 |
Correct |
1 ms |
2652 KB |
Output is correct |
| 14 |
Correct |
1 ms |
2652 KB |
Output is correct |
| 15 |
Correct |
1 ms |
2392 KB |
Output is correct |
| 16 |
Correct |
1 ms |
2392 KB |
Output is correct |
| 17 |
Correct |
1 ms |
2396 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 |
2652 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 |
2648 KB |
Output is correct |
| 24 |
Correct |
1 ms |
2652 KB |
Output is correct |
| 25 |
Correct |
1 ms |
2652 KB |
Output is correct |
| 26 |
Correct |
1 ms |
2772 KB |
Output is correct |
| 27 |
Correct |
1 ms |
2652 KB |
Output is correct |
| 28 |
Correct |
1 ms |
2652 KB |
Output is correct |
| 29 |
Correct |
1 ms |
2908 KB |
Output is correct |
| 30 |
Correct |
1 ms |
2652 KB |
Output is correct |
| 31 |
Correct |
1 ms |
2908 KB |
Output is correct |
| 32 |
Correct |
1 ms |
2908 KB |
Output is correct |
| 33 |
Correct |
4 ms |
6492 KB |
Output is correct |
| 34 |
Correct |
4 ms |
6748 KB |
Output is correct |
| 35 |
Correct |
12 ms |
7104 KB |
Output is correct |
| 36 |
Correct |
5 ms |
6900 KB |
Output is correct |
| 37 |
Correct |
6 ms |
7260 KB |
Output is correct |
| 38 |
Correct |
17 ms |
7600 KB |
Output is correct |
| 39 |
Correct |
7 ms |
9308 KB |
Output is correct |
| 40 |
Correct |
6 ms |
9564 KB |
Output is correct |
| 41 |
Correct |
21 ms |
10180 KB |
Output is correct |
| 42 |
Correct |
7 ms |
9560 KB |
Output is correct |
| 43 |
Correct |
7 ms |
10076 KB |
Output is correct |
| 44 |
Correct |
25 ms |
10720 KB |
Output is correct |
| 45 |
Correct |
10 ms |
10048 KB |
Output is correct |
| 46 |
Correct |
8 ms |
10588 KB |
Output is correct |
| 47 |
Correct |
32 ms |
11100 KB |
Output is correct |
| 48 |
Correct |
10 ms |
10332 KB |
Output is correct |
| 49 |
Correct |
10 ms |
10844 KB |
Output is correct |
| 50 |
Correct |
36 ms |
11480 KB |
Output is correct |
| 51 |
Correct |
11 ms |
10588 KB |
Output is correct |
| 52 |
Correct |
10 ms |
11096 KB |
Output is correct |
| 53 |
Correct |
54 ms |
11864 KB |
Output is correct |
| 54 |
Correct |
13 ms |
12888 KB |
Output is correct |
| 55 |
Correct |
15 ms |
13660 KB |
Output is correct |
| 56 |
Correct |
56 ms |
14172 KB |
Output is correct |
| 57 |
Correct |
15 ms |
13192 KB |
Output is correct |
| 58 |
Correct |
14 ms |
13960 KB |
Output is correct |
| 59 |
Correct |
67 ms |
14724 KB |
Output is correct |
| 60 |
Correct |
16 ms |
13608 KB |
Output is correct |
| 61 |
Correct |
15 ms |
14172 KB |
Output is correct |
| 62 |
Correct |
87 ms |
15004 KB |
Output is correct |
| 63 |
Correct |
76 ms |
14940 KB |
Output is correct |
| 64 |
Correct |
102 ms |
15104 KB |
Output is correct |
| 65 |
Correct |
137 ms |
15100 KB |
Output is correct |
| 66 |
Correct |
84 ms |
15108 KB |
Output is correct |
| 67 |
Correct |
91 ms |
15104 KB |
Output is correct |
| 68 |
Correct |
39 ms |
14940 KB |
Output is correct |
| 69 |
Correct |
35 ms |
14940 KB |
Output is correct |
| 70 |
Correct |
34 ms |
15344 KB |
Output is correct |
| 71 |
Correct |
29 ms |
15140 KB |
Output is correct |
| 72 |
Correct |
25 ms |
14940 KB |
Output is correct |
| 73 |
Correct |
26 ms |
15356 KB |
Output is correct |
| 74 |
Correct |
35 ms |
15196 KB |
Output is correct |
| 75 |
Correct |
37 ms |
15196 KB |
Output is correct |
| 76 |
Correct |
44 ms |
15192 KB |
Output is correct |
| 77 |
Correct |
40 ms |
15368 KB |
Output is correct |
| 78 |
Correct |
48 ms |
15364 KB |
Output is correct |
| 79 |
Correct |
39 ms |
15192 KB |
Output is correct |
| 80 |
Correct |
39 ms |
15196 KB |
Output is correct |
| 81 |
Correct |
44 ms |
15336 KB |
Output is correct |
| 82 |
Correct |
38 ms |
15196 KB |
Output is correct |
| 83 |
Correct |
59 ms |
15200 KB |
Output is correct |
| 84 |
Correct |
41 ms |
15192 KB |
Output is correct |
| 85 |
Correct |
48 ms |
15300 KB |
Output is correct |
| 86 |
Correct |
50 ms |
15192 KB |
Output is correct |
| 87 |
Correct |
46 ms |
15196 KB |
Output is correct |
| 88 |
Correct |
47 ms |
15192 KB |
Output is correct |
| 89 |
Correct |
48 ms |
15196 KB |
Output is correct |
| 90 |
Correct |
72 ms |
15244 KB |
Output is correct |
| 91 |
Correct |
56 ms |
15244 KB |
Output is correct |
| 92 |
Correct |
52 ms |
15192 KB |
Output is correct |
