Submission #554975

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
554975	2022-04-29T19:19:08 Z	savackexp	Mecho (IOI09_mecho)	C++14	23 / 100	520 ms	17436 KB

mecho

#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';
}
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]=u;
        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]);
                ll qe = (levelm[nx][ny])/k +((levelm[nx][ny])%k!=0) ;
                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:125:18: 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]
  125 |     for(int i=0;i<h.size();i++)
      |                 ~^~~~~~~~~
mecho.cpp: In function 'int main()':
mecho.cpp:167:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  167 |             for(int j=0;j<s.size();j++)
      |                         ~^~~~~~~~~

Subtask #1

23.0 / 100.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	19 ms	5448 KB	Output is correct
2	Correct	19 ms	5332 KB	Output is correct
3	Correct	16 ms	5332 KB	Output is correct
4	Correct	12 ms	5332 KB	Output is correct
5	Incorrect	11 ms	5460 KB	Output isn't correct
6	Correct	11 ms	5460 KB	Output is correct
7	Incorrect	388 ms	16616 KB	Output isn't correct
8	Correct	17 ms	5460 KB	Output is correct
9	Incorrect	16 ms	5532 KB	Output isn't correct
10	Incorrect	10 ms	5460 KB	Output isn't correct
11	Incorrect	13 ms	5540 KB	Output isn't correct
12	Incorrect	13 ms	5996 KB	Output isn't correct
13	Incorrect	12 ms	5924 KB	Output isn't correct
14	Correct	12 ms	6016 KB	Output is correct
15	Correct	12 ms	5588 KB	Output is correct
16	Incorrect	16 ms	5588 KB	Output isn't correct
17	Correct	23 ms	5588 KB	Output is correct
18	Incorrect	17 ms	5588 KB	Output isn't correct
19	Correct	16 ms	5704 KB	Output is correct
20	Incorrect	13 ms	5704 KB	Output isn't correct
21	Correct	12 ms	5804 KB	Output is correct
22	Incorrect	16 ms	5800 KB	Output isn't correct
23	Correct	12 ms	5904 KB	Output is correct
24	Incorrect	12 ms	5904 KB	Output isn't correct
25	Correct	16 ms	5972 KB	Output is correct
26	Incorrect	13 ms	5996 KB	Output isn't correct
27	Correct	14 ms	6044 KB	Output is correct
28	Incorrect	17 ms	5972 KB	Output isn't correct
29	Correct	17 ms	6108 KB	Output is correct
30	Incorrect	26 ms	6116 KB	Output isn't correct
31	Correct	18 ms	6156 KB	Output is correct
32	Incorrect	15 ms	6164 KB	Output isn't correct
33	Correct	33 ms	10196 KB	Output is correct
34	Incorrect	36 ms	10216 KB	Output isn't correct
35	Incorrect	118 ms	10204 KB	Output isn't correct
36	Correct	54 ms	10820 KB	Output is correct
37	Incorrect	56 ms	10912 KB	Output isn't correct
38	Incorrect	165 ms	10832 KB	Output isn't correct
39	Correct	42 ms	11604 KB	Output is correct
40	Incorrect	56 ms	11640 KB	Output isn't correct
41	Incorrect	196 ms	11636 KB	Output isn't correct
42	Correct	54 ms	12244 KB	Output is correct
43	Incorrect	49 ms	12344 KB	Output isn't correct
44	Incorrect	192 ms	12348 KB	Output isn't correct
45	Correct	67 ms	13012 KB	Output is correct
46	Incorrect	73 ms	13028 KB	Output isn't correct
47	Incorrect	229 ms	13040 KB	Output isn't correct
48	Correct	84 ms	13652 KB	Output is correct
49	Incorrect	91 ms	13704 KB	Output isn't correct
50	Incorrect	351 ms	13724 KB	Output isn't correct
51	Correct	100 ms	14540 KB	Output is correct
52	Incorrect	89 ms	14520 KB	Output isn't correct
53	Incorrect	364 ms	14548 KB	Output isn't correct
54	Correct	95 ms	15256 KB	Output is correct
55	Incorrect	94 ms	15256 KB	Output isn't correct
56	Incorrect	434 ms	15280 KB	Output isn't correct
57	Correct	90 ms	16004 KB	Output is correct
58	Incorrect	95 ms	16008 KB	Output isn't correct
59	Incorrect	454 ms	16044 KB	Output isn't correct
60	Correct	99 ms	16748 KB	Output is correct
61	Incorrect	90 ms	16720 KB	Output isn't correct
62	Incorrect	520 ms	16768 KB	Output isn't correct
63	Incorrect	203 ms	16716 KB	Output isn't correct
64	Incorrect	428 ms	16764 KB	Output isn't correct
65	Incorrect	297 ms	16764 KB	Output isn't correct
66	Incorrect	240 ms	16784 KB	Output isn't correct
67	Correct	200 ms	16820 KB	Output is correct
68	Incorrect	151 ms	16756 KB	Output isn't correct
69	Incorrect	129 ms	16824 KB	Output isn't correct
70	Incorrect	109 ms	16824 KB	Output isn't correct
71	Incorrect	119 ms	16876 KB	Output isn't correct
72	Incorrect	107 ms	16748 KB	Output isn't correct
73	Incorrect	150 ms	17436 KB	Output isn't correct
74	Incorrect	235 ms	17316 KB	Output isn't correct
75	Incorrect	216 ms	17384 KB	Output isn't correct
76	Incorrect	184 ms	17320 KB	Output isn't correct
77	Incorrect	195 ms	17308 KB	Output isn't correct
78	Correct	264 ms	17316 KB	Output is correct
79	Incorrect	199 ms	17228 KB	Output isn't correct
80	Incorrect	180 ms	17280 KB	Output isn't correct
81	Incorrect	225 ms	17224 KB	Output isn't correct
82	Incorrect	184 ms	17248 KB	Output isn't correct
83	Incorrect	263 ms	17164 KB	Output isn't correct
84	Incorrect	311 ms	17184 KB	Output isn't correct
85	Incorrect	239 ms	17228 KB	Output isn't correct
86	Incorrect	244 ms	17148 KB	Output isn't correct
87	Incorrect	278 ms	17100 KB	Output isn't correct
88	Incorrect	267 ms	17108 KB	Output isn't correct
89	Incorrect	363 ms	17100 KB	Output isn't correct
90	Incorrect	315 ms	16972 KB	Output isn't correct
91	Incorrect	318 ms	17104 KB	Output isn't correct
92	Incorrect	296 ms	17104 KB	Output isn't correct