oj.uz

Submission #953195

# Submission time Handle Problem Language Result Execution time Memory
953195 2024-03-25T16:48:02 Z tmtxangel Mecho (IOI09_mecho) C++17
10 / 100
 121 ms 6532 KB 
#include <bits/stdc++.h>


#define lli long long
#define ld long double
#define tmt angel

using namespace std;
const int maxn = 802;
int vis[maxn][maxn], n, m;
char a[maxn][maxn];
int tim[maxn][maxn];
int hi, hj, sti, stj;
int x[4] = {1, -1, 0, 0};
int y[4] = {0, 0, 1, -1};
deque<pair<pair<int, int>, int>> s;
bool flag = false;

void gocheck(int i, int j, int cost)
{
    if(i < 1 || j < 1 || i > n || j > n || vis[i][j] == 1 || a[i][j] == 'D') return;
    vis[i][j] = 1;
    tim[i][j] = cost;
    s.push_back({{i, j}, cost});
}
void spread(int i, int j, int cost, int step)
{
    if(vis[hi][hj] == 1) return;
    if(i < 1 || j < 1 || i > n || j > n || vis[i][j] == 1 || tim[i][j] < cost) return;
    vis[i][j] = 1;
   //     cout << i << " " << j << " " << cost << " " << step << '\n';
    if(vis[hi][hj] == 1) return;
    if(step == m)
    {
        //tim[1][i][j] = cost;
        s.push_back({{i, j}, cost});
    }
    else
    {
       // tim[1][i][j] = cost;
          for(int f = 0; f < 4; f++)
          {
             spread(i + x[f], j + y[f], cost, step + 1);
            if(vis[hi][hj] == 1) break;
          }
    }
}

void Bfs()
{
    while(!s.empty())
    {
        int i = s.front().first.first;
        int j = s.front().first.second;
        int c = s.front().second;
        s.pop_front();
        for(int f = 0; f < 4; f++)
        {
            gocheck(i + x[f], j + y[f], c+1);
        }
    }
}

bool checked(int st)
{
    s.clear();
    flag = false;
   // if(st == 0) s.push_back({ {sti, stj},{2, 0} });
    for(int i = 1; i <= n; i++)
    {
    for(int j = 1; j <= n; j++)
    {
        vis[i][j] = a[i][j] == 'G' || a[i][j] == 'D' ? 0 : 1;
    }
    }
    s.push_back({{sti, stj}, st});
    while(!s.empty() && vis[hi][hj] == 0)
    {
         int i = s.front().first.first;
        int j = s.front().first.second;
        int c = s.front().second;
        s.pop_front();
        for(int f = 0; f < 4; f++)
        {
            spread(i + x[f], j + y[f], c+1, 1);
            if(vis[hi][hj] == 1) break;
        }
    }
       return vis[hi][hj] == 1;

}

int main()
{
  ios_base::sync_with_stdio(false);
  cin.tie(nullptr);
//   freopen(".INP", "r" , stdin);
//   freopen(".OUT", "w" , stdout);
cin >> n >> m;
for(int i = 1; i <= n; i++)
{
    for(int j = 1; j <= n; j++)
    {
        cin >> a[i][j];
        if(a[i][j] == 'M')
        {
            vis[i][j] = 1;
            sti = i;
            stj = j;
        }
        else vis[i][j] = a[i][j] == 'G' ? 0 : 1;
        if(a[i][j] == 'D')
        {
            hi = i;
            hj = j;
        }
        if(a[i][j] == 'H')
        {
            s.push_back({{i, j}, 0});
            vis[i][j] = 1;
        }
    }
}
Bfs();
tim[hi][hj] = 1e9;
 //cout << checked(1);
int low = 0, high = n, mid;
while(low <= high)
{
    mid = (low + high) / 2;
    if(checked(mid)) low = mid+1;
    else high = mid - 1;
}
cout << high;

return 0;
}

Subtask #1
10.0 / 100.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 2392 KB Output isn't correct
2 Incorrect 1 ms 2396 KB Output isn't correct
3 Incorrect 0 ms 2396 KB Output isn't correct
4 Incorrect 1 ms 2396 KB Output isn't correct
5 Correct 1 ms 2396 KB Output is correct
6 Correct 1 ms 2396 KB Output is correct
7 Incorrect 85 ms 6288 KB Output isn't correct
8 Incorrect 1 ms 2396 KB Output isn't correct
9 Incorrect 1 ms 2396 KB Output isn't correct
10 Correct 1 ms 2396 KB Output is correct
11 Correct 1 ms 2396 KB Output is correct
12 Incorrect 1 ms 4700 KB Output isn't correct
13 Incorrect 1 ms 2652 KB Output isn't correct
14 Correct 1 ms 4700 KB Output is correct
15 Incorrect 1 ms 2396 KB Output isn't correct
16 Incorrect 1 ms 2392 KB Output isn't correct
17 Incorrect 1 ms 2396 KB Output isn't correct
18 Incorrect 1 ms 2396 KB Output isn't correct
19 Incorrect 1 ms 2392 KB Output isn't correct
20 Incorrect 1 ms 2396 KB Output isn't correct
21 Incorrect 1 ms 2396 KB Output isn't correct
22 Incorrect 1 ms 2396 KB Output isn't correct
23 Incorrect 1 ms 2648 KB Output isn't correct
24 Incorrect 1 ms 2652 KB Output isn't correct
25 Incorrect 1 ms 4700 KB Output isn't correct
26 Incorrect 1 ms 4700 KB Output isn't correct
27 Incorrect 1 ms 4700 KB Output isn't correct
28 Incorrect 1 ms 4952 KB Output isn't correct
29 Incorrect 1 ms 4700 KB Output isn't correct
30 Incorrect 1 ms 4696 KB Output isn't correct
31 Incorrect 1 ms 4700 KB Output isn't correct
32 Incorrect 1 ms 4952 KB Output isn't correct
33 Incorrect 4 ms 4700 KB Output isn't correct
34 Incorrect 4 ms 4764 KB Output isn't correct
35 Correct 18 ms 4700 KB Output is correct
36 Incorrect 5 ms 4700 KB Output isn't correct
37 Incorrect 5 ms 4876 KB Output isn't correct
38 Correct 23 ms 4956 KB Output is correct
39 Incorrect 6 ms 4956 KB Output isn't correct
40 Incorrect 6 ms 4964 KB Output isn't correct
41 Correct 31 ms 5156 KB Output is correct
42 Incorrect 8 ms 4956 KB Output isn't correct
43 Incorrect 7 ms 4956 KB Output isn't correct
44 Correct 43 ms 5460 KB Output is correct
45 Incorrect 8 ms 5212 KB Output isn't correct
46 Incorrect 9 ms 5212 KB Output isn't correct
47 Correct 46 ms 5464 KB Output is correct
48 Incorrect 10 ms 5464 KB Output isn't correct
49 Incorrect 11 ms 5468 KB Output isn't correct
50 Correct 56 ms 5636 KB Output is correct
51 Incorrect 12 ms 5720 KB Output isn't correct
52 Incorrect 13 ms 5464 KB Output isn't correct
53 Correct 74 ms 5824 KB Output is correct
54 Incorrect 14 ms 5720 KB Output isn't correct
55 Incorrect 15 ms 5808 KB Output isn't correct
56 Correct 81 ms 5988 KB Output is correct
57 Incorrect 16 ms 5720 KB Output isn't correct
58 Incorrect 15 ms 5960 KB Output isn't correct
59 Correct 92 ms 5976 KB Output is correct
60 Incorrect 19 ms 5976 KB Output isn't correct
61 Incorrect 18 ms 5980 KB Output isn't correct
62 Correct 104 ms 6356 KB Output is correct
63 Correct 81 ms 6100 KB Output is correct
64 Incorrect 119 ms 6232 KB Output isn't correct
65 Correct 121 ms 6228 KB Output is correct
66 Incorrect 99 ms 5976 KB Output isn't correct
67 Correct 84 ms 6104 KB Output is correct
68 Correct 38 ms 5980 KB Output is correct
69 Correct 34 ms 5980 KB Output is correct
70 Correct 32 ms 5980 KB Output is correct
71 Correct 32 ms 5980 KB Output is correct
72 Incorrect 51 ms 5980 KB Output isn't correct
73 Incorrect 64 ms 6520 KB Output isn't correct
74 Incorrect 60 ms 6488 KB Output isn't correct
75 Incorrect 68 ms 6492 KB Output isn't correct
76 Incorrect 57 ms 6492 KB Output isn't correct
77 Incorrect 66 ms 6492 KB Output isn't correct
78 Correct 67 ms 6492 KB Output is correct
79 Incorrect 79 ms 6532 KB Output isn't correct
80 Incorrect 72 ms 6492 KB Output isn't correct
81 Incorrect 64 ms 6492 KB Output isn't correct
82 Incorrect 64 ms 6496 KB Output isn't correct
83 Incorrect 73 ms 6232 KB Output isn't correct
84 Incorrect 76 ms 6256 KB Output isn't correct
85 Incorrect 70 ms 6400 KB Output isn't correct
86 Incorrect 75 ms 6412 KB Output isn't correct
87 Incorrect 81 ms 6236 KB Output isn't correct
88 Incorrect 72 ms 6236 KB Output isn't correct
89 Incorrect 88 ms 6236 KB Output isn't correct
90 Incorrect 86 ms 6344 KB Output isn't correct
91 Incorrect 81 ms 6232 KB Output isn't correct
92 Incorrect 84 ms 6232 KB Output isn't correct