| # |
Submission time |
Handle |
Problem |
Language |
Result |
Execution time |
Memory |
| 1008467 |
2024-06-26T13:01:30 Z |
ByeWorld |
Mecho (IOI09_mecho) |
C++14 |
|
417 ms |
15188 KB |
#include <bits/stdc++.h>
#pragma GCC optimize("O3", "unroll-loops")
#define ll long long
#define int long long
#define pb push_back
#define fi first
#define se second
#define lf (id<<1)
#define rg ((id<<1)|1)
#define md ((l+r)>>1)
#define ld long double
using namespace std;
typedef pair<int,int> pii;
typedef pair<pii, int> ipii;
const int MAXN = 1010;
const int MAXA = 2e3+10;
const int INF = 1e18+10;
const int LOG = 63;
const int MOD = 1e9+7;
const int SQRT = 450;
const vector<int> NOL = {};
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
const vector<int> dx = {1, -1, 0, 0};
const vector<int> dy = {0, 0, 1, -1};
int n, m, k;
char c[MAXN][MAXN];
int dis[MAXN][MAXN], val[MAXN][MAXN];
int sta, en;
bool valid(int x, int y){
if(x<1 || x>n || y<1 || y>m) return 0;
if(c[x][y] == 'T') return 0;
return 1;
}
queue <pii> q;
void bfs(){
while(!q.empty()){
int dist = q.front().fi, x = q.front().se/MAXN, y = q.front().se%MAXN;
q.pop();
if(dist > dis[x][y]) continue;
for(int i=0; i<4; i++){
int nx = x+dx[i], ny = y+dy[i];
if(!valid(nx, ny)) continue;
if(c[nx][ny] == 'D') continue;
if(dis[nx][ny] <= dis[x][y]+k) continue;
dis[nx][ny] = dis[x][y]+k;
q.push({dis[nx][ny], nx*MAXN+ny});
}
}
}
bool bisa(int num){
if(dis[sta/MAXN][sta%MAXN] <= num*k) return 0;
for(int i=1; i<=n; i++)
for(int j=1; j<=m; j++) val[i][j] = INF;
q.push({num*k, sta}); val[sta/MAXN][sta%MAXN] = num*k;
while(!q.empty()){
int dist = q.front().fi, x = q.front().se/MAXN, y = q.front().se%MAXN;
q.pop();
if(dist >= dis[x][y]) continue; // bee ke sini
if(dist > val[x][y]) continue;
for(int i=0; i<4; i++){
int nx = x+dx[i], ny = y+dy[i];
if(!valid(nx, ny)) continue;
if(val[nx][ny] <= val[x][y]+1) continue;
if(dis[nx][ny] <= val[x][y]+1) continue;
val[nx][ny] = val[x][y]+1;
q.push({val[nx][ny], nx*MAXN+ny});
}
}
return (val[en/MAXN][en%MAXN] < INF);
}
signed main(){
// ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
cin >> n >> k; m = n;
for(int i=1; i<=n; i++)
for(int j=1; j<=m; j++) dis[i][j] = INF;
for(int i=1; i<=n; i++){
for(int j=1; j<=m; j++){
cin >> c[i][j];
if(c[i][j]=='H'){
q.push({0, i*MAXN+j});
dis[i][j] = 0;
} else if(c[i][j]=='D') en = i*MAXN+j;
else if(c[i][j]=='M') sta = i*MAXN+j;
}
}
bfs();
// for(int i=1; i<=n; i++){
// for(int j=1; j<=m; j++) cout << dis[i][j] << " \n"[j==m];
// }
int l=0, r=INF, mid=0, cnt=-1;
while(l<=r){
mid = md;
if(bisa(mid)){ cnt = mid; l = mid+1;}
else r = mid-1;
}
cout << cnt << '\n';
}
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
348 KB |
Output is correct |
| 2 |
Correct |
1 ms |
348 KB |
Output is correct |
| 3 |
Correct |
0 ms |
352 KB |
Output is correct |
| 4 |
Correct |
0 ms |
348 KB |
Output is correct |
| 5 |
Correct |
0 ms |
348 KB |
Output is correct |
| 6 |
Correct |
1 ms |
348 KB |
Output is correct |
| 7 |
Incorrect |
342 ms |
14896 KB |
Output isn't correct |
| 8 |
Correct |
0 ms |
348 KB |
Output is correct |
| 9 |
Correct |
0 ms |
348 KB |
Output is correct |
| 10 |
Correct |
0 ms |
604 KB |
Output is correct |
| 11 |
Correct |
0 ms |
348 KB |
Output is correct |
| 12 |
Correct |
1 ms |
960 KB |
Output is correct |
| 13 |
Correct |
1 ms |
860 KB |
Output is correct |
| 14 |
Correct |
1 ms |
860 KB |
Output is correct |
| 15 |
Correct |
1 ms |
600 KB |
Output is correct |
| 16 |
Correct |
0 ms |
604 KB |
Output is correct |
| 17 |
Correct |
0 ms |
604 KB |
Output is correct |
| 18 |
Correct |
0 ms |
856 KB |
Output is correct |
| 19 |
Correct |
1 ms |
600 KB |
Output is correct |
| 20 |
Correct |
0 ms |
600 KB |
Output is correct |
| 21 |
Correct |
1 ms |
704 KB |
Output is correct |
| 22 |
Incorrect |
1 ms |
604 KB |
Output isn't correct |
| 23 |
Correct |
1 ms |
860 KB |
Output is correct |
| 24 |
Incorrect |
1 ms |
860 KB |
Output isn't correct |
| 25 |
Correct |
1 ms |
860 KB |
Output is correct |
| 26 |
Incorrect |
1 ms |
860 KB |
Output isn't correct |
| 27 |
Correct |
1 ms |
860 KB |
Output is correct |
| 28 |
Incorrect |
1 ms |
1116 KB |
Output isn't correct |
| 29 |
Correct |
1 ms |
1116 KB |
Output is correct |
| 30 |
Incorrect |
2 ms |
1116 KB |
Output isn't correct |
| 31 |
Correct |
1 ms |
1116 KB |
Output is correct |
| 32 |
Incorrect |
1 ms |
1116 KB |
Output isn't correct |
| 33 |
Correct |
9 ms |
5468 KB |
Output is correct |
| 34 |
Incorrect |
34 ms |
5600 KB |
Output isn't correct |
| 35 |
Incorrect |
43 ms |
5468 KB |
Output isn't correct |
| 36 |
Correct |
12 ms |
6488 KB |
Output is correct |
| 37 |
Incorrect |
29 ms |
6492 KB |
Output isn't correct |
| 38 |
Incorrect |
54 ms |
6492 KB |
Output isn't correct |
| 39 |
Correct |
12 ms |
7772 KB |
Output is correct |
| 40 |
Incorrect |
39 ms |
7876 KB |
Output isn't correct |
| 41 |
Incorrect |
98 ms |
7772 KB |
Output isn't correct |
| 42 |
Correct |
19 ms |
8908 KB |
Output is correct |
| 43 |
Incorrect |
40 ms |
8932 KB |
Output isn't correct |
| 44 |
Incorrect |
114 ms |
9300 KB |
Output isn't correct |
| 45 |
Correct |
17 ms |
9816 KB |
Output is correct |
| 46 |
Incorrect |
80 ms |
9832 KB |
Output isn't correct |
| 47 |
Incorrect |
136 ms |
9820 KB |
Output isn't correct |
| 48 |
Correct |
20 ms |
10840 KB |
Output is correct |
| 49 |
Incorrect |
68 ms |
10748 KB |
Output isn't correct |
| 50 |
Incorrect |
141 ms |
10848 KB |
Output isn't correct |
| 51 |
Correct |
30 ms |
11780 KB |
Output is correct |
| 52 |
Incorrect |
76 ms |
11612 KB |
Output isn't correct |
| 53 |
Incorrect |
162 ms |
11600 KB |
Output isn't correct |
| 54 |
Correct |
26 ms |
12448 KB |
Output is correct |
| 55 |
Incorrect |
85 ms |
12528 KB |
Output isn't correct |
| 56 |
Incorrect |
229 ms |
12464 KB |
Output isn't correct |
| 57 |
Correct |
28 ms |
13400 KB |
Output is correct |
| 58 |
Incorrect |
103 ms |
13392 KB |
Output isn't correct |
| 59 |
Incorrect |
258 ms |
13400 KB |
Output isn't correct |
| 60 |
Correct |
32 ms |
14364 KB |
Output is correct |
| 61 |
Incorrect |
123 ms |
14420 KB |
Output isn't correct |
| 62 |
Incorrect |
269 ms |
14420 KB |
Output isn't correct |
| 63 |
Correct |
90 ms |
14512 KB |
Output is correct |
| 64 |
Incorrect |
417 ms |
14424 KB |
Output isn't correct |
| 65 |
Correct |
116 ms |
14344 KB |
Output is correct |
| 66 |
Correct |
107 ms |
14508 KB |
Output is correct |
| 67 |
Correct |
87 ms |
14416 KB |
Output is correct |
| 68 |
Incorrect |
409 ms |
14572 KB |
Output isn't correct |
| 69 |
Incorrect |
301 ms |
14448 KB |
Output isn't correct |
| 70 |
Incorrect |
402 ms |
14568 KB |
Output isn't correct |
| 71 |
Correct |
43 ms |
14416 KB |
Output is correct |
| 72 |
Incorrect |
263 ms |
14416 KB |
Output isn't correct |
| 73 |
Correct |
54 ms |
15188 KB |
Output is correct |
| 74 |
Incorrect |
348 ms |
15008 KB |
Output isn't correct |
| 75 |
Correct |
63 ms |
14932 KB |
Output is correct |
| 76 |
Correct |
57 ms |
14932 KB |
Output is correct |
| 77 |
Incorrect |
346 ms |
15016 KB |
Output isn't correct |
| 78 |
Correct |
67 ms |
14932 KB |
Output is correct |
| 79 |
Incorrect |
310 ms |
14932 KB |
Output isn't correct |
| 80 |
Correct |
65 ms |
14932 KB |
Output is correct |
| 81 |
Correct |
61 ms |
14932 KB |
Output is correct |
| 82 |
Incorrect |
298 ms |
14820 KB |
Output isn't correct |
| 83 |
Correct |
70 ms |
14760 KB |
Output is correct |
| 84 |
Incorrect |
288 ms |
14928 KB |
Output isn't correct |
| 85 |
Incorrect |
290 ms |
14928 KB |
Output isn't correct |
| 86 |
Correct |
63 ms |
14928 KB |
Output is correct |
| 87 |
Incorrect |
274 ms |
14932 KB |
Output isn't correct |
| 88 |
Incorrect |
306 ms |
14672 KB |
Output isn't correct |
| 89 |
Incorrect |
308 ms |
14836 KB |
Output isn't correct |
| 90 |
Incorrect |
310 ms |
14592 KB |
Output isn't correct |
| 91 |
Incorrect |
321 ms |
14828 KB |
Output isn't correct |
| 92 |
Incorrect |
298 ms |
14672 KB |
Output isn't correct |
