oj.uz

Submission #998320

# Submission time Handle Problem Language Result Execution time Memory
998320 2024-06-13T15:40:29 Z AtinaR Mecho (IOI09_mecho) C++14
38 / 100
 135 ms 11860 KB 
#include <bits/stdc++.h>

using namespace std;
const long long MAX=810;
long long n,s;
char mat[MAX][MAX];
long long si,sj,ei,ej;
long long di[4]= {0,0,-1,1};
long long dj[4]= {1,-1,0,0};
vector<pair<long long,long long> > hives;
long long distmecho[MAX][MAX];
long long occupied[MAX][MAX];
bool canspreadhive(long long i, long long j)
{
    if(i<0 || i>=n || j<0 || j>=n || occupied[i][j]!=-1 || mat[i][j]=='T' || mat[i][j]=='D')return false;
    return true;
}
void spread_hives()
{
    memset(occupied,-1,sizeof(occupied));
    queue<pair<long long,long long> > q;
    for(auto x:hives)
    {
        q.push(x);
        occupied[x.first][x.second]=0;
    }
    while(!q.empty())
    {
        auto curr=q.front();
        q.pop();
        for(long long k=0; k<4; k++)
        {
            long long newi=curr.first+di[k];
            long long newj=curr.second+dj[k];
            if(!canspreadhive(newi,newj))continue;
            occupied[newi][newj]=occupied[curr.first][curr.second]+1;
            q.push({newi,newj});
        }
    }
}
bool canmechostep(long long i, long long j)
{
    if(i<0 || i>=n || j<0 || j>=n || distmecho[i][j]!=-1 || mat[i][j]=='H' || mat[i][j]=='T')return false;
    return true;
}
bool can_stay(long long X)
{
    memset(distmecho,-1,sizeof(distmecho));
    distmecho[si][sj]=0;
    queue<pair<long long,long long> > q;
    q.push({si,sj});
    while(!q.empty())
    {
        auto curr=q.front();
        q.pop();
        for(long long k=0; k<4; k++)
        {
            long long newi=curr.first+di[k];
            long long newj=curr.second+dj[k];
            if(!canmechostep(newi,newj))continue;
            long long newtime=distmecho[curr.first][curr.second]+1;
            long long tmp=newtime;
            long long use=tmp/s+X;
            if(tmp%s)use++;
            if(use<=occupied[newi][newj] || (newi==ei && newj==ej))
            {
                distmecho[newi][newj]=newtime;
                q.push({newi,newj});
            }
        }
    }
    if(distmecho[ei][ej]!=-1)return true;
    else return false;
}
int main()
{
    cin>>n>>s;
    for(long long i=0; i<n; i++)
    {
        for(long long j=0; j<n; j++)
        {
            cin>>mat[i][j];
            if(mat[i][j]=='M')
            {
                si=i;
                sj=j;
            }
            else if(mat[i][j]=='D')
            {
                ei=i;
                ej=j;
            }
            else if(mat[i][j]=='H')
            {
                hives.push_back({i,j});
            }
        }
    }
    spread_hives();
    long long B=0,E=1e6;
    long long res=-1;
    while(B<=E)
    {
        long long mid=(B+E)/2;
        if(can_stay(mid))
        {
            res=mid;
            B=mid+1;
        }
        else
        {
            E=mid-1;
        }
    }
    cout<<res<<endl;
    return 0;
}

Subtask #1
38.0 / 100.0

# Verdict Execution time Memory Grader output
1 Incorrect 3 ms 10840 KB Output isn't correct
2 Incorrect 3 ms 10840 KB Output isn't correct
3 Incorrect 5 ms 10844 KB Output isn't correct
4 Incorrect 3 ms 10872 KB Output isn't correct
5 Correct 3 ms 10772 KB Output is correct
6 Correct 3 ms 10844 KB Output is correct
7 Correct 77 ms 11552 KB Output is correct
8 Incorrect 3 ms 10840 KB Output isn't correct
9 Correct 3 ms 10844 KB Output is correct
10 Correct 3 ms 10872 KB Output is correct
11 Correct 3 ms 10844 KB Output is correct
12 Incorrect 3 ms 10844 KB Output isn't correct
13 Incorrect 4 ms 10840 KB Output isn't correct
14 Correct 3 ms 10840 KB Output is correct
15 Incorrect 4 ms 10844 KB Output isn't correct
16 Correct 4 ms 10844 KB Output is correct
17 Incorrect 3 ms 10844 KB Output isn't correct
18 Correct 3 ms 10876 KB Output is correct
19 Incorrect 3 ms 10844 KB Output isn't correct
20 Correct 3 ms 10844 KB Output is correct
21 Incorrect 3 ms 10844 KB Output isn't correct
22 Correct 3 ms 10844 KB Output is correct
23 Incorrect 3 ms 10844 KB Output isn't correct
24 Correct 3 ms 10844 KB Output is correct
25 Incorrect 4 ms 10844 KB Output isn't correct
26 Correct 3 ms 10844 KB Output is correct
27 Incorrect 4 ms 10844 KB Output isn't correct
28 Correct 3 ms 10844 KB Output is correct
29 Incorrect 3 ms 10652 KB Output isn't correct
30 Correct 4 ms 10844 KB Output is correct
31 Incorrect 3 ms 10844 KB Output isn't correct
32 Correct 3 ms 10844 KB Output is correct
33 Incorrect 8 ms 10844 KB Output isn't correct
34 Correct 9 ms 10952 KB Output is correct
35 Correct 20 ms 10988 KB Output is correct
36 Incorrect 9 ms 10844 KB Output isn't correct
37 Correct 9 ms 10844 KB Output is correct
38 Correct 26 ms 11028 KB Output is correct
39 Incorrect 11 ms 10844 KB Output isn't correct
40 Correct 12 ms 10844 KB Output is correct
41 Correct 31 ms 10844 KB Output is correct
42 Incorrect 13 ms 11096 KB Output isn't correct
43 Correct 14 ms 11100 KB Output is correct
44 Correct 40 ms 11116 KB Output is correct
45 Incorrect 18 ms 11100 KB Output isn't correct
46 Correct 18 ms 11040 KB Output is correct
47 Correct 49 ms 11096 KB Output is correct
48 Incorrect 17 ms 11100 KB Output isn't correct
49 Correct 17 ms 11100 KB Output is correct
50 Correct 56 ms 10988 KB Output is correct
51 Incorrect 20 ms 11088 KB Output isn't correct
52 Correct 21 ms 10956 KB Output is correct
53 Correct 81 ms 11100 KB Output is correct
54 Incorrect 23 ms 11100 KB Output isn't correct
55 Correct 24 ms 11196 KB Output is correct
56 Correct 82 ms 11100 KB Output is correct
57 Incorrect 23 ms 11088 KB Output isn't correct
58 Correct 30 ms 11092 KB Output is correct
59 Correct 100 ms 11092 KB Output is correct
60 Incorrect 26 ms 11092 KB Output isn't correct
61 Correct 27 ms 11340 KB Output is correct
62 Correct 97 ms 11344 KB Output is correct
63 Correct 92 ms 11596 KB Output is correct
64 Correct 135 ms 11096 KB Output is correct
65 Correct 126 ms 11344 KB Output is correct
66 Incorrect 116 ms 11332 KB Output isn't correct
67 Correct 98 ms 11092 KB Output is correct
68 Correct 49 ms 11344 KB Output is correct
69 Correct 51 ms 11344 KB Output is correct
70 Correct 48 ms 11344 KB Output is correct
71 Correct 41 ms 11356 KB Output is correct
72 Incorrect 38 ms 11356 KB Output isn't correct
73 Incorrect 42 ms 11748 KB Output isn't correct
74 Correct 56 ms 11704 KB Output is correct
75 Correct 62 ms 11856 KB Output is correct
76 Correct 56 ms 11860 KB Output is correct
77 Correct 59 ms 11860 KB Output is correct
78 Correct 64 ms 11856 KB Output is correct
79 Correct 55 ms 11860 KB Output is correct
80 Correct 61 ms 11624 KB Output is correct
81 Correct 61 ms 11856 KB Output is correct
82 Correct 51 ms 11856 KB Output is correct
83 Correct 90 ms 11544 KB Output is correct
84 Correct 70 ms 11748 KB Output is correct
85 Correct 62 ms 11600 KB Output is correct
86 Correct 67 ms 11608 KB Output is correct
87 Correct 68 ms 11768 KB Output is correct
88 Correct 68 ms 11604 KB Output is correct
89 Correct 75 ms 11604 KB Output is correct
90 Correct 70 ms 11604 KB Output is correct
91 Correct 70 ms 11604 KB Output is correct
92 Correct 69 ms 11604 KB Output is correct