oj.uz

Submission #554808

# Submission time Handle Problem Language Result Execution time Memory
554808 2022-04-29T13:01:09 Z roctes7 Mecho (IOI09_mecho) C++17
4 / 100
 549 ms 31744 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
#define mpa make_pair
typedef long long ll;
typedef long double ld;
const int MOD=1e9+7;
const int MAX=2e5+1;

ll n,s;
string arr[802][802];
bool vist[802][802];
ll mechoDist[802][802];
ll BeesDist[802][802];
pair<ll,ll> mecho;
pair<ll,ll> home;

ll dx[]={1,-1,0,0};
ll dy[]={0,0,1,-1};

bool valid (ll x,ll y){
return x>=1&&x<=n&&y>=1&&y<=n&&!vist[x][y]&&arr[x][y]!="T";
}


bool check =false;

void bfs (ll val){
vist[mecho.fi][mecho.se]=true;
queue<pair<ll,ll>>q;
q.push(mecho);

while (!q.empty()){
    auto p =q.front();
    ll x = p.fi;
    ll y = p.se;
    q.pop();
if(x==home.fi&&y==home.se)check=true;



for (ll i=0;i<4;i++){
        ll nx = x+dx[i];
        ll ny = y+dy[i];

        if(valid(nx,ny)&&arr[nx][ny]=="G"&&val+mechoDist[nx][ny]<BeesDist[nx][ny]){
          vist[nx][ny]=true;
          q.push(mpa(nx,ny));
        }
    }
}



}

int main(){

fastio
//freopen("11.in","r",stdin);
//freopen("cl.out","w",stdout);

cin>>n>>s;

for (int i=1;i<=n;i++)for (int j=1;j<=n;j++){
    BeesDist[i][j]=1e9;
    mechoDist[i][j]=1e9;
}

for (ll i=1;i<=n;i++){
    string s;
    cin>>s;
    for (ll j=1;j<=n;j++){
        arr[i][j]=s[j-1];

        if(arr[i][j]=="M")mecho=mpa(i,j);
        else if (arr[i][j]=="D")home = mpa(i,j);
    }
}

queue <pair<ll,ll>> q;
q.push(mecho);
mechoDist[mecho.fi][mecho.se]=0;
vist[mecho.fi][mecho.se]=true;

while(!q.empty()){
    auto p = q.front();
    ll x = p.fi;
    ll y = p.se;

    q.pop();

    for (ll i=0;i<4;i++){
        ll nx = x+dx[i];
        ll ny = y+dy[i];

        if(valid(nx,ny)&&arr[nx][ny]!="H"){
            mechoDist[nx][ny]=mechoDist[x][y]+1;
            vist[nx][ny]=true;
            q.push(mpa(nx,ny));
        }
    }

}


for (ll i=1;i<=n;i++)for(ll j=1;j<=n;j++){
mechoDist[i][j]=mechoDist[i][j]/s;

vist[i][j]=false;
}



for (ll i=1;i<=n;i++)for (ll j=1;j<=n;j++){
    if(arr[i][j]=="H"){
            q.push(mpa(i,j));
            BeesDist[i][j]=0;
            vist[i][j]=true;
    }
}



while(!q.empty()){
    auto p = q.front();
    ll x = p.fi;
    ll y = p.se;
    q.pop();

    for (ll i=0;i<4;i++){
        ll nx = x+dx[i];
        ll ny = y+dy[i];

        if(valid(nx,ny)&&arr[nx][ny]!="D"&&arr[nx][ny]!="H"){
            BeesDist[nx][ny]=BeesDist[x][y]+1;
            vist[nx][ny]=true;
            q.push(mpa(nx,ny));
        }
    }

}


/*cout<<endl<<endl;
for(ll i=1;i<=n;i++){for (ll j=1;j<=n;j++){
        if(arr[i][j]=="G")
     cout<<mechoDist[i][j];
     else cout<<arr[i][j];
}
cout<<endl;
}

cout<<endl<<endl;
for(ll i=1;i<=n;i++){for (ll j=1;j<=n;j++){
    cout<<BeesDist[i][j];
}
cout<<endl;
}*/




ll l=0;
ll r = 1e9;
ll ans =-1;
while (l<=r){
    ll mid = (l+r)/2;
    for (ll i=1;i<=n;i++)for(ll j=1;j<=n;j++){
 vist[i][j]=false;
}
check=false;
bfs(mid);

if(check){
    l=mid+1;
    ans = mid;

} else {
r=mid-1;
}



}

cout<<ans;
return 0;


}





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);
}

Subtask #1
4.0 / 100.0

# Verdict Execution time Memory Grader output
1 Incorrect 10 ms 20504 KB Output isn't correct
2 Incorrect 13 ms 20436 KB Output isn't correct
3 Incorrect 10 ms 20436 KB Output isn't correct
4 Incorrect 11 ms 20436 KB Output isn't correct
5 Incorrect 13 ms 20564 KB Output isn't correct
6 Incorrect 11 ms 20484 KB Output isn't correct
7 Incorrect 347 ms 31380 KB Output isn't correct
8 Correct 14 ms 20564 KB Output is correct
9 Incorrect 13 ms 20564 KB Output isn't correct
10 Incorrect 11 ms 20528 KB Output isn't correct
11 Incorrect 11 ms 20564 KB Output isn't correct
12 Incorrect 15 ms 20972 KB Output isn't correct
13 Incorrect 11 ms 20944 KB Output isn't correct
14 Correct 11 ms 21076 KB Output is correct
15 Incorrect 12 ms 20564 KB Output isn't correct
16 Incorrect 12 ms 20628 KB Output isn't correct
17 Incorrect 12 ms 20692 KB Output isn't correct
18 Incorrect 13 ms 20692 KB Output isn't correct
19 Incorrect 10 ms 20704 KB Output isn't correct
20 Incorrect 10 ms 20692 KB Output isn't correct
21 Incorrect 11 ms 20800 KB Output isn't correct
22 Incorrect 13 ms 20796 KB Output isn't correct
23 Incorrect 14 ms 20960 KB Output isn't correct
24 Incorrect 20 ms 20948 KB Output isn't correct
25 Incorrect 12 ms 20948 KB Output isn't correct
26 Incorrect 14 ms 21056 KB Output isn't correct
27 Incorrect 11 ms 21060 KB Output isn't correct
28 Incorrect 12 ms 21076 KB Output isn't correct
29 Incorrect 11 ms 21076 KB Output isn't correct
30 Incorrect 13 ms 21096 KB Output isn't correct
31 Incorrect 13 ms 21204 KB Output isn't correct
32 Incorrect 12 ms 21204 KB Output isn't correct
33 Incorrect 47 ms 25248 KB Output isn't correct
34 Incorrect 68 ms 25044 KB Output isn't correct
35 Incorrect 89 ms 25140 KB Output isn't correct
36 Incorrect 56 ms 25812 KB Output isn't correct
37 Incorrect 81 ms 25820 KB Output isn't correct
38 Incorrect 85 ms 25716 KB Output isn't correct
39 Incorrect 70 ms 26484 KB Output isn't correct
40 Incorrect 113 ms 26480 KB Output isn't correct
41 Incorrect 158 ms 26392 KB Output isn't correct
42 Incorrect 107 ms 27156 KB Output isn't correct
43 Incorrect 128 ms 27144 KB Output isn't correct
44 Incorrect 155 ms 27152 KB Output isn't correct
45 Incorrect 110 ms 27816 KB Output isn't correct
46 Incorrect 170 ms 27816 KB Output isn't correct
47 Incorrect 213 ms 27828 KB Output isn't correct
48 Incorrect 114 ms 28364 KB Output isn't correct
49 Incorrect 175 ms 28500 KB Output isn't correct
50 Incorrect 251 ms 28500 KB Output isn't correct
51 Incorrect 153 ms 29136 KB Output isn't correct
52 Incorrect 216 ms 29160 KB Output isn't correct
53 Incorrect 277 ms 29248 KB Output isn't correct
54 Incorrect 162 ms 29824 KB Output isn't correct
55 Incorrect 276 ms 29892 KB Output isn't correct
56 Incorrect 323 ms 29900 KB Output isn't correct
57 Incorrect 181 ms 30488 KB Output isn't correct
58 Incorrect 325 ms 30500 KB Output isn't correct
59 Incorrect 366 ms 30500 KB Output isn't correct
60 Incorrect 212 ms 31152 KB Output isn't correct
61 Incorrect 342 ms 31156 KB Output isn't correct
62 Incorrect 436 ms 31172 KB Output isn't correct
63 Incorrect 344 ms 31052 KB Output isn't correct
64 Incorrect 549 ms 31180 KB Output isn't correct
65 Incorrect 492 ms 31156 KB Output isn't correct
66 Incorrect 500 ms 31156 KB Output isn't correct
67 Correct 363 ms 31164 KB Output is correct
68 Incorrect 197 ms 31160 KB Output isn't correct
69 Incorrect 254 ms 31216 KB Output isn't correct
70 Incorrect 181 ms 31180 KB Output isn't correct
71 Incorrect 179 ms 31308 KB Output isn't correct
72 Incorrect 231 ms 31292 KB Output isn't correct
73 Incorrect 191 ms 31696 KB Output isn't correct
74 Incorrect 357 ms 31708 KB Output isn't correct
75 Incorrect 282 ms 31708 KB Output isn't correct
76 Incorrect 250 ms 31708 KB Output isn't correct
77 Incorrect 307 ms 31708 KB Output isn't correct
78 Correct 278 ms 31552 KB Output is correct
79 Incorrect 330 ms 31744 KB Output isn't correct
80 Incorrect 293 ms 31640 KB Output isn't correct
81 Incorrect 230 ms 31652 KB Output isn't correct
82 Incorrect 272 ms 31656 KB Output isn't correct
83 Incorrect 328 ms 31576 KB Output isn't correct
84 Incorrect 386 ms 31552 KB Output isn't correct
85 Incorrect 305 ms 31564 KB Output isn't correct
86 Incorrect 276 ms 31544 KB Output isn't correct
87 Incorrect 376 ms 31596 KB Output isn't correct
88 Incorrect 292 ms 31472 KB Output isn't correct
89 Incorrect 451 ms 31480 KB Output isn't correct
90 Incorrect 308 ms 31484 KB Output isn't correct
91 Incorrect 339 ms 31484 KB Output isn't correct
92 Incorrect 324 ms 31484 KB Output isn't correct