| # |
Submission time |
Handle |
Problem |
Language |
Result |
Execution time |
Memory |
| 309481 |
2020-10-03T15:16:40 Z |
sofapuden |
Mecho (IOI09_mecho) |
C++14 |
|
476 ms |
6544 KB |
#include <bits/stdc++.h>
using namespace std;
#define f first
#define s second
int n, k;
bool ok = 0;
int mid;
pair<int,int> sta, en;
vector<string> G;
vector<vector<int>> V;
vector<vector<int>> vis;
queue<pair<pair<int,int>,int>> Q, Q2;
void search2(pair<pair<int,int>,int> now){
if(vis[now.f.f][now.f.s])return;
vis[now.f.f][now.f.s] = 1;
if(now.f.f != n-1){
if(V[now.f.f+1][now.f.s] > (now.s+1)/k+mid){
Q2.push({{now.f.f+1,now.f.s},now.s+1});
}
}
if(now.f.s != n-1){
if(V[now.f.f][now.f.s+1] > (now.s+1)/k+mid){
Q2.push({{now.f.f,now.f.s+1},now.s+1});
}
}
if(now.f.f != 0){
if(V[now.f.f-1][now.f.s] > (now.s+1)/k+mid){
Q2.push({{now.f.f-1,now.f.s},now.s+1});
}
}
if(now.f.s != 0){
if(V[now.f.f][now.f.s-1] > (now.s+1)/k+mid){
Q2.push({{now.f.f,now.f.s-1},now.s+1});
}
}
}
void search(pair<pair<int,int>,int> now){
if(now.f.f < 0 || now.f.s < 0 || now.f.f >= n || now.f.s >= n)return;
if(V[now.f.f][now.f.s] != -1)return;
V[now.f.f][now.f.s] = now.s;
Q.push({{now.f.f-1,now.f.s},now.s+1});
Q.push({{now.f.f+1,now.f.s},now.s+1});
Q.push({{now.f.f,now.f.s-1},now.s+1});
Q.push({{now.f.f,now.f.s+1},now.s+1});
}
int main(){
cin >> n >> k;
G.resize(n);
V.resize(n, vector<int> (n,-1));
for(auto &x : G)cin >> x;
for(int i = 0; i < n; ++i){
for(int j = 0; j < n; ++j){
if(G[i][j] == 'T')V[i][j] = -2;
if(G[i][j] == 'M')sta = {i,j};
if(G[i][j] == 'D'){en = {i,j};V[i][j] = 1000000;}
if(G[i][j] == 'H')Q.push({{i,j},0});
}
}
while(!Q.empty()){
auto x = Q.front();
Q.pop();
search(x);
}
//for(int i = 0; i < n; ++i){
//for(int j = 0; j < n; ++j){
//cout << V[i][j] << " ";
//}
//cout << "\n";
//}
int best = -1;
int hi = V[sta.f][sta.s]-1, lo = 0;
while(lo <= hi){
mid = (hi+lo)/2;
vis.clear();
vis.resize(n, vector<int> (n, 0));
Q2.push({sta,0});
ok = 0;
while(!Q2.empty()){
auto x = Q2.front();
Q2.pop();
if(x.f == en){ok = 1;break;}
search2(x);
}
Q2 = queue<pair<pair<int,int>,int>>();
if(ok){lo = mid+1;best = mid;}
else hi = mid-1;
}
cout << best << "\n";
}
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
384 KB |
Output is correct |
| 2 |
Correct |
0 ms |
256 KB |
Output is correct |
| 3 |
Correct |
0 ms |
256 KB |
Output is correct |
| 4 |
Correct |
1 ms |
384 KB |
Output is correct |
| 5 |
Correct |
0 ms |
256 KB |
Output is correct |
| 6 |
Correct |
1 ms |
256 KB |
Output is correct |
| 7 |
Correct |
422 ms |
6512 KB |
Output is correct |
| 8 |
Correct |
0 ms |
256 KB |
Output is correct |
| 9 |
Correct |
1 ms |
384 KB |
Output is correct |
| 10 |
Correct |
0 ms |
256 KB |
Output is correct |
| 11 |
Correct |
0 ms |
256 KB |
Output is correct |
| 12 |
Correct |
1 ms |
384 KB |
Output is correct |
| 13 |
Correct |
1 ms |
384 KB |
Output is correct |
| 14 |
Correct |
1 ms |
384 KB |
Output is correct |
| 15 |
Correct |
0 ms |
256 KB |
Output is correct |
| 16 |
Correct |
1 ms |
256 KB |
Output is correct |
| 17 |
Correct |
1 ms |
384 KB |
Output is correct |
| 18 |
Correct |
0 ms |
384 KB |
Output is correct |
| 19 |
Correct |
1 ms |
384 KB |
Output is correct |
| 20 |
Correct |
1 ms |
384 KB |
Output is correct |
| 21 |
Correct |
1 ms |
384 KB |
Output is correct |
| 22 |
Correct |
1 ms |
384 KB |
Output is correct |
| 23 |
Correct |
1 ms |
384 KB |
Output is correct |
| 24 |
Correct |
1 ms |
384 KB |
Output is correct |
| 25 |
Correct |
1 ms |
384 KB |
Output is correct |
| 26 |
Correct |
1 ms |
384 KB |
Output is correct |
| 27 |
Correct |
1 ms |
384 KB |
Output is correct |
| 28 |
Correct |
1 ms |
384 KB |
Output is correct |
| 29 |
Correct |
1 ms |
384 KB |
Output is correct |
| 30 |
Correct |
1 ms |
384 KB |
Output is correct |
| 31 |
Correct |
1 ms |
416 KB |
Output is correct |
| 32 |
Correct |
1 ms |
384 KB |
Output is correct |
| 33 |
Correct |
15 ms |
1540 KB |
Output is correct |
| 34 |
Correct |
16 ms |
1560 KB |
Output is correct |
| 35 |
Correct |
83 ms |
1628 KB |
Output is correct |
| 36 |
Correct |
19 ms |
1912 KB |
Output is correct |
| 37 |
Correct |
22 ms |
1756 KB |
Output is correct |
| 38 |
Correct |
105 ms |
1976 KB |
Output is correct |
| 39 |
Correct |
25 ms |
2208 KB |
Output is correct |
| 40 |
Correct |
26 ms |
2208 KB |
Output is correct |
| 41 |
Correct |
140 ms |
2204 KB |
Output is correct |
| 42 |
Correct |
31 ms |
2860 KB |
Output is correct |
| 43 |
Correct |
32 ms |
2896 KB |
Output is correct |
| 44 |
Correct |
175 ms |
2884 KB |
Output is correct |
| 45 |
Correct |
37 ms |
3308 KB |
Output is correct |
| 46 |
Correct |
39 ms |
3436 KB |
Output is correct |
| 47 |
Correct |
211 ms |
3324 KB |
Output is correct |
| 48 |
Correct |
45 ms |
3888 KB |
Output is correct |
| 49 |
Correct |
47 ms |
3832 KB |
Output is correct |
| 50 |
Correct |
246 ms |
3820 KB |
Output is correct |
| 51 |
Correct |
53 ms |
4376 KB |
Output is correct |
| 52 |
Correct |
55 ms |
4368 KB |
Output is correct |
| 53 |
Correct |
296 ms |
4464 KB |
Output is correct |
| 54 |
Correct |
61 ms |
5004 KB |
Output is correct |
| 55 |
Correct |
64 ms |
5004 KB |
Output is correct |
| 56 |
Correct |
349 ms |
5028 KB |
Output is correct |
| 57 |
Correct |
71 ms |
5596 KB |
Output is correct |
| 58 |
Correct |
75 ms |
5620 KB |
Output is correct |
| 59 |
Correct |
414 ms |
5652 KB |
Output is correct |
| 60 |
Correct |
83 ms |
6284 KB |
Output is correct |
| 61 |
Correct |
83 ms |
6280 KB |
Output is correct |
| 62 |
Correct |
476 ms |
6264 KB |
Output is correct |
| 63 |
Correct |
266 ms |
6228 KB |
Output is correct |
| 64 |
Correct |
407 ms |
6256 KB |
Output is correct |
| 65 |
Correct |
409 ms |
6228 KB |
Output is correct |
| 66 |
Correct |
305 ms |
6224 KB |
Output is correct |
| 67 |
Correct |
280 ms |
6244 KB |
Output is correct |
| 68 |
Correct |
129 ms |
6264 KB |
Output is correct |
| 69 |
Correct |
114 ms |
6252 KB |
Output is correct |
| 70 |
Correct |
110 ms |
6264 KB |
Output is correct |
| 71 |
Correct |
100 ms |
6264 KB |
Output is correct |
| 72 |
Correct |
94 ms |
6252 KB |
Output is correct |
| 73 |
Correct |
155 ms |
6296 KB |
Output is correct |
| 74 |
Correct |
285 ms |
6352 KB |
Output is correct |
| 75 |
Correct |
263 ms |
6208 KB |
Output is correct |
| 76 |
Correct |
294 ms |
6240 KB |
Output is correct |
| 77 |
Correct |
291 ms |
6328 KB |
Output is correct |
| 78 |
Correct |
320 ms |
6400 KB |
Output is correct |
| 79 |
Correct |
250 ms |
6488 KB |
Output is correct |
| 80 |
Correct |
282 ms |
6304 KB |
Output is correct |
| 81 |
Correct |
293 ms |
6360 KB |
Output is correct |
| 82 |
Correct |
260 ms |
6292 KB |
Output is correct |
| 83 |
Correct |
371 ms |
6400 KB |
Output is correct |
| 84 |
Correct |
318 ms |
6280 KB |
Output is correct |
| 85 |
Correct |
322 ms |
6280 KB |
Output is correct |
| 86 |
Correct |
380 ms |
6228 KB |
Output is correct |
| 87 |
Correct |
309 ms |
6284 KB |
Output is correct |
| 88 |
Correct |
408 ms |
6260 KB |
Output is correct |
| 89 |
Correct |
373 ms |
6280 KB |
Output is correct |
| 90 |
Correct |
432 ms |
6376 KB |
Output is correct |
| 91 |
Correct |
411 ms |
6356 KB |
Output is correct |
| 92 |
Correct |
386 ms |
6544 KB |
Output is correct |
