oj.uz

Submission #1007491

# Submission time Handle Problem Language Result Execution time Memory
1007491 2024-06-25T04:15:54 Z huutuan Mecho (IOI09_mecho) C++14
29 / 100
 113 ms 11868 KB 
#include <bits/stdc++.h>

using namespace std;

#define int long long

const int N=810, dx[]={1, -1, 0, 0}, dy[]={0, 0, 1, -1};
int n, s;
char a[N][N];
int d[N][N], f[N][N];
int xm, ym, xd, yd;

bool check(int t){
   queue<pair<int, int>> q;
   memset(f, 0x3f, sizeof f);
   q.emplace(xm, ym); f[xm][ym]=t*s;
   if ((f[xm][ym]+s-1)/s>d[xm][ym]) return 0;
   while (q.size()){
      int x=q.front().first, y=q.front().second; q.pop();
      if (x==xd && y==yd) return 1;
      for (int i=0; i<4; ++i){
         int u=x+dx[i], v=y+dy[i];
         if (u<1 || v<1 || u>n || v>n || f[u][v]<1e18 || (f[x][y]+s)/s>d[u][v] || a[u][v]=='T') continue;
         f[u][v]=f[x][y]+1;
         q.emplace(u, v);
      }
   }
   return 0;
}

int32_t main(){
   ios_base::sync_with_stdio(false);
   cin.tie(nullptr);
   cin >> n >> s;
   queue<pair<int, int>> q;
   memset(d, 0x3f, sizeof d);
   for (int i=1; i<=n; ++i) for (int j=1; j<=n; ++j){
      cin >> a[i][j];
      if (a[i][j]=='M') xm=i, ym=j;
      if (a[i][j]=='D') xd=i, yd=j;
      if (a[i][j]=='H'){
         d[i][j]=0;
         q.emplace(i, j);
      }
   }
   while (q.size()){
      int x=q.front().first, y=q.front().second; q.pop();
      for (int i=0; i<4; ++i){
         int u=x+dx[i], v=y+dy[i];
         if (u<1 || v<1 || u>n || v>n || d[u][v]<1e18 || a[u][v]=='T' || a[u][v]=='D') continue;
         d[u][v]=d[x][y]+1;
         q.emplace(u, v);
      }
   }
   int l=1, r=1e9;
   while (l<=r){
      int mid=(l+r)>>1;
      if (check(mid)) l=mid+1;
      else r=mid-1;
   }
   cout << r << '\n';
   return 0;
}

Subtask #1
29.0 / 100.0

# Verdict Execution time Memory Grader output
1 Incorrect 4 ms 10844 KB Output isn't correct
2 Incorrect 4 ms 10844 KB Output isn't correct
3 Incorrect 4 ms 10844 KB Output isn't correct
4 Incorrect 4 ms 10896 KB Output isn't correct
5 Correct 4 ms 10844 KB Output is correct
6 Correct 4 ms 10844 KB Output is correct
7 Correct 48 ms 11408 KB Output is correct
8 Incorrect 4 ms 10840 KB Output isn't correct
9 Correct 4 ms 10844 KB Output is correct
10 Correct 4 ms 10840 KB Output is correct
11 Correct 4 ms 10844 KB Output is correct
12 Incorrect 3 ms 10844 KB Output isn't correct
13 Incorrect 4 ms 10844 KB Output isn't correct
14 Incorrect 4 ms 10908 KB Output isn't correct
15 Incorrect 5 ms 10844 KB Output isn't correct
16 Correct 4 ms 10896 KB Output is correct
17 Incorrect 4 ms 10844 KB Output isn't correct
18 Correct 4 ms 10896 KB Output is correct
19 Incorrect 3 ms 10896 KB Output isn't correct
20 Correct 4 ms 10840 KB Output is correct
21 Incorrect 4 ms 10844 KB Output isn't correct
22 Correct 4 ms 10896 KB Output is correct
23 Incorrect 4 ms 10900 KB Output isn't correct
24 Correct 4 ms 10844 KB Output is correct
25 Incorrect 4 ms 10844 KB Output isn't correct
26 Correct 4 ms 10844 KB Output is correct
27 Incorrect 4 ms 10844 KB Output isn't correct
28 Correct 4 ms 10844 KB Output is correct
29 Incorrect 4 ms 10844 KB Output isn't correct
30 Correct 4 ms 10676 KB Output is correct
31 Incorrect 4 ms 11096 KB Output isn't correct
32 Correct 4 ms 10844 KB Output is correct
33 Incorrect 6 ms 11008 KB Output isn't correct
34 Correct 6 ms 10844 KB Output is correct
35 Correct 13 ms 10844 KB Output is correct
36 Incorrect 6 ms 11048 KB Output isn't correct
37 Correct 6 ms 11052 KB Output is correct
38 Correct 17 ms 10844 KB Output is correct
39 Incorrect 7 ms 10844 KB Output isn't correct
40 Correct 6 ms 11100 KB Output is correct
41 Correct 21 ms 11100 KB Output is correct
42 Incorrect 7 ms 11100 KB Output isn't correct
43 Correct 7 ms 11100 KB Output is correct
44 Correct 28 ms 11112 KB Output is correct
45 Incorrect 8 ms 11096 KB Output isn't correct
46 Correct 9 ms 11176 KB Output is correct
47 Correct 32 ms 11004 KB Output is correct
48 Incorrect 10 ms 11092 KB Output isn't correct
49 Correct 10 ms 11216 KB Output is correct
50 Correct 44 ms 11100 KB Output is correct
51 Incorrect 10 ms 11100 KB Output isn't correct
52 Correct 9 ms 11124 KB Output is correct
53 Correct 46 ms 11048 KB Output is correct
54 Incorrect 13 ms 11100 KB Output isn't correct
55 Correct 11 ms 11100 KB Output is correct
56 Correct 50 ms 11348 KB Output is correct
57 Incorrect 11 ms 11096 KB Output isn't correct
58 Correct 10 ms 11100 KB Output is correct
59 Correct 59 ms 11100 KB Output is correct
60 Incorrect 13 ms 11356 KB Output isn't correct
61 Correct 12 ms 11356 KB Output is correct
62 Correct 66 ms 11356 KB Output is correct
63 Correct 68 ms 11352 KB Output is correct
64 Correct 108 ms 11352 KB Output is correct
65 Correct 113 ms 11352 KB Output is correct
66 Incorrect 77 ms 11356 KB Output isn't correct
67 Incorrect 68 ms 11348 KB Output isn't correct
68 Correct 29 ms 11348 KB Output is correct
69 Correct 32 ms 11352 KB Output is correct
70 Correct 35 ms 11236 KB Output is correct
71 Correct 25 ms 11348 KB Output is correct
72 Incorrect 25 ms 11352 KB Output isn't correct
73 Incorrect 27 ms 11840 KB Output isn't correct
74 Correct 39 ms 11832 KB Output is correct
75 Correct 45 ms 11868 KB Output is correct
76 Correct 40 ms 11864 KB Output is correct
77 Correct 36 ms 11868 KB Output is correct
78 Incorrect 42 ms 11680 KB Output isn't correct
79 Correct 37 ms 11864 KB Output is correct
80 Correct 39 ms 11864 KB Output is correct
81 Correct 40 ms 11612 KB Output is correct
82 Correct 33 ms 11608 KB Output is correct
83 Correct 49 ms 11608 KB Output is correct
84 Correct 42 ms 11612 KB Output is correct
85 Correct 50 ms 11612 KB Output is correct
86 Correct 49 ms 11612 KB Output is correct
87 Correct 46 ms 11768 KB Output is correct
88 Correct 41 ms 11608 KB Output is correct
89 Correct 51 ms 11608 KB Output is correct
90 Correct 47 ms 11608 KB Output is correct
91 Correct 45 ms 11508 KB Output is correct
92 Correct 47 ms 11612 KB Output is correct