oj.uz

Submission #554997

# Submission time Handle Problem Language Result Execution time Memory
554997 2022-04-29T19:52:25 Z savackexp Mecho (IOI09_mecho) C++14
4 / 100
 1000 ms 16812 KB 
#include<bits/stdc++.h>
using namespace std;
#define in insert
#define fastio ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
#define endl "\n"
#define Endl "\n"
#define ENDL "\n"
#define fi first
#define se second
#define be  begin()
#define en  end()
#define pb push_back
typedef long long ll;
typedef long double ld;
const int MOD=1e9+7;
const int MAX=2e5+1;/*
ll  binpow(ll  a, ll  b) {
    ld  res = 1;
    while (b > 0) {
        if (b & 1)
            res = res * a;
        a = a * a;
        b >>= 1;
    }

    return res;
}
unsigned long long power(unsigned long long x,
                                ll y, ll p)
{
    unsigned long long res = 1; // Initialize result

    x = x % p; // Update x if it is more than or
    // equal to p

    while (y > 0)
    {

        // If y is odd, multiply x with result
        if (y & 1)
            res = (res * x) % p;

        // y must be even now
        y = y >> 1; // y = y/2
        x = (x * x) % p;
    }
    return res;
}

unsigned long long modInverse(unsigned long long n,
                                            ll p)
{
    return power(n, p - 2, p);
}
*/
ll n  , k ;
ll dx[]={0 , 0 , 1, -1};
ll dy[]={1 , -1 , 0, 0};
char grid[805][805];
ll vis[805][805];
ll levelm[805][805];
ll levelh[805][805];
vector<pair<ll,ll>>hive;
bool valid(ll x , ll y)
{
    return x>=0 && y>=0 && x<n && y<n && grid[x][y]!='H' && grid[x][y]!='T';
}
bool valid1(ll x , ll y)
{
    return x>=0 && y>=0 && x<n && y<n  && grid[x][y]!='T' && grid[x][y]!='D'  && grid[x][y]!='M';
}
pair<ll,ll>m , d;
bool check(ll u)
{
        for(int i=0;i<n;i++)
        {
            for(int j=0;j<n;j++)
            {
                levelm[i][j]=1e18;
            }
        }
        memset(vis , 0 ,sizeof vis );
        queue< pair<ll,ll> >q;
        q.push({m.fi,m.se});
        vis[m.fi][m.se]=1;
        levelm[m.fi][m.se]=0;
        while(!q.empty())
        {
            pair<ll,ll>p=q.front();
            q.pop();
            for(int i=0;i<4;i++)
            {
                ll nx = p.fi +  dx[i];
                ll ny = p.se +  dy[i];
                if(!valid(nx,ny))continue;
                levelm[nx][ny]=min(levelm[p.fi][p.se]+1 ,levelm[nx][ny] + u);
                ll qe = (levelm[nx][ny])/k;
                if(levelh[nx][ny] <= qe)continue;
                if(vis[nx][ny])continue;
                vis[nx][ny] = 1;
                q.push({nx , ny});

            }

        }

    if(levelm[d.fi][d.se] != 1e18)
    {
        return true;
    }
    return false;
}

void bfs(vector<pair<ll,ll>>h)
{
    queue<pair<ll,ll> >q;
    for(int i=0;i<n;i++)
    {
        for(int j=0;j<n;j++)
        {
            levelh[i][j]=1e18;
        }
    }
    for(int i=0;i<h.size();i++)
    {
        levelh[h[i].fi][h[i].se]=0;
        vis[h[i].fi][h[i].se]=1;
        q.push(h[i]);
    }
    while(!q.empty())
    {
        pair<ll,ll>p=q.front();
        q.pop();
        for(int i=0;i<4;i++)
        {

            ll nx = p.fi + dx[i];
            ll ny = p.se + dy[i];
            if(!valid1(nx,ny))continue;
            levelh[nx][ny] = min(levelh[p.fi][p.se]+1 ,levelh[nx][ny]);
            if(vis[nx][ny])continue;
            vis[nx][ny] = 1;
            q.push({nx , ny});
        }

    }
}





int main()
{

        fastio

        //freopen("gravity.in","r",stdin);
        //freopen("gravity.out","w",stdout);

        cin>>n>>k;
        for(int i=0;i<n;i++)
        {
            string s;
            cin>>s;
            for(int j=0;j<s.size();j++)
            {
                grid[i][j]=s[j];
                if(s[j]=='H')hive.pb({i,j});
                else if(s[j]=='M')m={i,j};
                else if(s[j]=='D')d={i,j};
            }
        }
        bfs(hive);
        memset(vis , 0 ,sizeof vis);
        ll l=0;
        ll r=1e18;
        ll ans=-1;
        while(l<=r)
        {
            ll mid=(l+r)/2;
            if(check(mid))
            {
                ans=mid;
                l=mid+1;
            }
            else r=mid-1;
        }
        cout<<ans<<endl;






































    return 0;
    }
/*
5 6
0 4 0
0 3 1
0 1 1
0 2 1
1 2 1
3 4 0

*/

Compilation message

mecho.cpp: In function 'void bfs(std::vector<std::pair<long long int, long long int> >)':
mecho.cpp:124:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  124 |     for(int i=0;i<h.size();i++)
      |                 ~^~~~~~~~~
mecho.cpp: In function 'int main()':
mecho.cpp:166:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  166 |             for(int j=0;j<s.size();j++)
      |                         ~^~~~~~~~~

Subtask #1
4.0 / 100.0

# Verdict Execution time Memory Grader output
1 Incorrect 10 ms 5332 KB Output isn't correct
2 Incorrect 10 ms 5332 KB Output isn't correct
3 Incorrect 14 ms 5444 KB Output isn't correct
4 Incorrect 12 ms 5456 KB Output isn't correct
5 Incorrect 12 ms 5460 KB Output isn't correct
6 Incorrect 12 ms 5496 KB Output isn't correct
7 Execution timed out 1088 ms 16308 KB Time limit exceeded
8 Correct 10 ms 5460 KB Output is correct
9 Incorrect 12 ms 5540 KB Output isn't correct
10 Incorrect 10 ms 5540 KB Output isn't correct
11 Incorrect 12 ms 5460 KB Output isn't correct
12 Incorrect 11 ms 5972 KB Output isn't correct
13 Incorrect 15 ms 5844 KB Output isn't correct
14 Correct 14 ms 6004 KB Output is correct
15 Incorrect 14 ms 5520 KB Output isn't correct
16 Incorrect 11 ms 5588 KB Output isn't correct
17 Incorrect 11 ms 5636 KB Output isn't correct
18 Incorrect 12 ms 5644 KB Output isn't correct
19 Incorrect 12 ms 5588 KB Output isn't correct
20 Incorrect 12 ms 5700 KB Output isn't correct
21 Incorrect 13 ms 5716 KB Output isn't correct
22 Incorrect 12 ms 5800 KB Output isn't correct
23 Incorrect 12 ms 5844 KB Output isn't correct
24 Incorrect 14 ms 5904 KB Output isn't correct
25 Incorrect 13 ms 5972 KB Output isn't correct
26 Incorrect 15 ms 5972 KB Output isn't correct
27 Incorrect 14 ms 6044 KB Output isn't correct
28 Incorrect 18 ms 6048 KB Output isn't correct
29 Incorrect 14 ms 6108 KB Output isn't correct
30 Incorrect 15 ms 6096 KB Output isn't correct
31 Incorrect 18 ms 6148 KB Output isn't correct
32 Incorrect 16 ms 6148 KB Output isn't correct
33 Incorrect 83 ms 10084 KB Output isn't correct
34 Incorrect 114 ms 10004 KB Output isn't correct
35 Incorrect 221 ms 10068 KB Output isn't correct
36 Incorrect 101 ms 10740 KB Output isn't correct
37 Incorrect 145 ms 10756 KB Output isn't correct
38 Incorrect 288 ms 10768 KB Output isn't correct
39 Incorrect 126 ms 11348 KB Output isn't correct
40 Incorrect 184 ms 11432 KB Output isn't correct
41 Incorrect 396 ms 11432 KB Output isn't correct
42 Incorrect 158 ms 11988 KB Output isn't correct
43 Incorrect 219 ms 11988 KB Output isn't correct
44 Incorrect 472 ms 12116 KB Output isn't correct
45 Incorrect 175 ms 12780 KB Output isn't correct
46 Incorrect 259 ms 12788 KB Output isn't correct
47 Incorrect 624 ms 12784 KB Output isn't correct
48 Incorrect 214 ms 13396 KB Output isn't correct
49 Incorrect 290 ms 13452 KB Output isn't correct
50 Incorrect 723 ms 13464 KB Output isn't correct
51 Incorrect 247 ms 14036 KB Output isn't correct
52 Incorrect 384 ms 14124 KB Output isn't correct
53 Incorrect 886 ms 14132 KB Output isn't correct
54 Incorrect 268 ms 14788 KB Output isn't correct
55 Incorrect 396 ms 14780 KB Output isn't correct
56 Execution timed out 1032 ms 14796 KB Time limit exceeded
57 Incorrect 307 ms 15456 KB Output isn't correct
58 Incorrect 449 ms 15444 KB Output isn't correct
59 Execution timed out 1080 ms 15380 KB Time limit exceeded
60 Incorrect 348 ms 16204 KB Output isn't correct
61 Incorrect 501 ms 16124 KB Output isn't correct
62 Execution timed out 1096 ms 16076 KB Time limit exceeded
63 Execution timed out 1091 ms 16084 KB Time limit exceeded
64 Execution timed out 1084 ms 16072 KB Time limit exceeded
65 Execution timed out 1097 ms 16104 KB Time limit exceeded
66 Execution timed out 1094 ms 16140 KB Time limit exceeded
67 Correct 703 ms 16204 KB Output is correct
68 Incorrect 377 ms 16196 KB Output isn't correct
69 Incorrect 483 ms 16200 KB Output isn't correct
70 Incorrect 328 ms 16080 KB Output isn't correct
71 Incorrect 300 ms 16200 KB Output isn't correct
72 Incorrect 508 ms 16224 KB Output isn't correct
73 Incorrect 780 ms 16812 KB Output isn't correct
74 Execution timed out 1089 ms 16596 KB Time limit exceeded
75 Incorrect 769 ms 16756 KB Output isn't correct
76 Incorrect 666 ms 16772 KB Output isn't correct
77 Incorrect 876 ms 16688 KB Output isn't correct
78 Correct 752 ms 16588 KB Output is correct
79 Execution timed out 1096 ms 16608 KB Time limit exceeded
80 Incorrect 773 ms 16588 KB Output isn't correct
81 Incorrect 724 ms 16684 KB Output isn't correct
82 Incorrect 837 ms 16664 KB Output isn't correct
83 Incorrect 934 ms 16532 KB Output isn't correct
84 Execution timed out 1089 ms 16544 KB Time limit exceeded
85 Execution timed out 1030 ms 16596 KB Time limit exceeded
86 Incorrect 973 ms 16592 KB Output isn't correct
87 Execution timed out 1090 ms 16584 KB Time limit exceeded
88 Execution timed out 1064 ms 16432 KB Time limit exceeded
89 Execution timed out 1094 ms 16444 KB Time limit exceeded
90 Execution timed out 1096 ms 16440 KB Time limit exceeded
91 Execution timed out 1090 ms 16540 KB Time limit exceeded
92 Execution timed out 1041 ms 16472 KB Time limit exceeded