#include <bits/stdc++.h> //Andrei Alexandru a.k.a Sho
#define ll long long
#define double long double
#pragma GCC optimize("O3")
#pragma GCC optimize("Ofast")
#define aint(a) (a).begin(), (a).end()
#define f first
#define s second
#define pb push_back
#define mp make_pair
#define pi pair
#define rc(s) return cout<<s,0
#define endl '\n'
#define mod 998244353
#define PI 3.14159265359
#define INF 1000000005
#define LINF 1000000000000000005ll
#define CODE_START ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0);
using namespace std;
ll n,s,sx,sy,dbees[805][805],d[805][805],viz[505][505],fx,fy;
pair<ll,ll>direction[5];
char a[805][805];
vector<pair<ll,ll>>hive;
ll check(ll x,ll y){
if(x>=1&&y>=1&&x<=n&&y<=n){
return 1;
}else return 0;
}
ll verif(ll time){
for(ll i=1;i<=n;i++)
for(ll j=1;j<=n;j++)
{
d[i][j]=LINF;
viz[i][j]=0;
}
queue<pair<ll,ll>>q;
d[sx][sy]=0;
viz[sx][sy]=1;
q.push(mp(sx,sy));
if(dbees[sx][sy]<=time){
q.pop();
}
while(!q.empty()){
ll x,y;
x=q.front().f;
y=q.front().s;
//cout<<x<<' '<<y<<endl;
q.pop();
for(ll i=0;i<4;i++)
{
ll xx,yy;
xx=x+direction[i].f;
yy=y+direction[i].s;
if(a[xx][yy]=='T'||a[xx][yy]=='H'){
continue;
}
if(check(xx,yy)==0){
continue;
}
if(viz[xx][yy]==1){
continue;
}
if((d[x][y]+1)/s>=dbees[xx][yy]-time){
continue;
}
viz[xx][yy]=1;
d[xx][yy]=d[x][y]+1;
q.push(mp(xx,yy));
}
}
ll ans=0;
for(ll i=0;i<4;i++)
{
ll x=fx+direction[i].f,y=fy+direction[i].s;
if(check(x,y)==0){
continue;
}
if(viz[x][y]==0){
continue;
}
if((d[x][y]/s)<dbees[x][y]-time){
ans=1;
}
}
return ans;
}
int32_t main(){
//CODE_START;
direction[0]=mp(-1,0);
direction[1]=mp(1,0);
direction[2]=mp(0,-1);
direction[3]=mp(0,1);
cin>>n>>s;
for(ll i=1;i<=n;i++)
{
for(ll j=1;j<=n;j++)
{
cin>>a[i][j];
if(a[i][j]=='M'){
sx=i;
sy=j;
}else if(a[i][j]=='H'){
hive.pb(mp(i,j));
}else if(a[i][j]=='D'){
fx=i;
fy=j;
}
}
}
for(ll i=1;i<=n;i++)
{
for(ll j=1;j<=n;j++)
{
dbees[i][j]=LINF;
}
}
queue<pair<ll,ll>>q;
for(auto it : hive){
q.push(it);
dbees[it.f][it.s]=0;
}
while(!q.empty()){
ll x,y;
x=q.front().f;
y=q.front().s;
q.pop();
for(ll i=0;i<4;i++)
{
ll xx,yy;
xx=x+direction[i].f;
yy=y+direction[i].s;
if(a[xx][yy]=='T'||a[xx][yy]=='D'||a[xx][yy]=='H'){
continue;
}
if(check(xx,yy)&&viz[xx][yy]==0){
viz[xx][yy]=1;
q.push(mp(xx,yy));
dbees[xx][yy]=dbees[x][y]+1;
}
}
}
ll l=0,r=n*n,ans=-1;
//cout<<"DA"<<endl;
while(l<=r){
ll mid=(l+r)/2;
// cout<<mid<<endl;
if(verif(mid)){
l=mid+1;
ans=mid;
}else {
r=mid-1;
}
}
cout<<ans<<endl;
}
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
0 ms |
332 KB |
Output is correct |
| 2 |
Correct |
0 ms |
332 KB |
Output is correct |
| 3 |
Correct |
1 ms |
332 KB |
Output is correct |
| 4 |
Correct |
0 ms |
332 KB |
Output is correct |
| 5 |
Correct |
0 ms |
332 KB |
Output is correct |
| 6 |
Correct |
0 ms |
332 KB |
Output is correct |
| 7 |
Incorrect |
121 ms |
13252 KB |
Output isn't correct |
| 8 |
Correct |
0 ms |
460 KB |
Output is correct |
| 9 |
Correct |
1 ms |
460 KB |
Output is correct |
| 10 |
Correct |
0 ms |
460 KB |
Output is correct |
| 11 |
Correct |
1 ms |
460 KB |
Output is correct |
| 12 |
Correct |
1 ms |
1100 KB |
Output is correct |
| 13 |
Correct |
1 ms |
972 KB |
Output is correct |
| 14 |
Correct |
1 ms |
1100 KB |
Output is correct |
| 15 |
Correct |
1 ms |
460 KB |
Output is correct |
| 16 |
Correct |
0 ms |
460 KB |
Output is correct |
| 17 |
Correct |
0 ms |
588 KB |
Output is correct |
| 18 |
Correct |
0 ms |
588 KB |
Output is correct |
| 19 |
Correct |
1 ms |
716 KB |
Output is correct |
| 20 |
Correct |
1 ms |
716 KB |
Output is correct |
| 21 |
Correct |
1 ms |
844 KB |
Output is correct |
| 22 |
Correct |
1 ms |
844 KB |
Output is correct |
| 23 |
Correct |
1 ms |
972 KB |
Output is correct |
| 24 |
Correct |
1 ms |
972 KB |
Output is correct |
| 25 |
Correct |
1 ms |
1100 KB |
Output is correct |
| 26 |
Correct |
1 ms |
1100 KB |
Output is correct |
| 27 |
Correct |
1 ms |
1192 KB |
Output is correct |
| 28 |
Correct |
1 ms |
1100 KB |
Output is correct |
| 29 |
Correct |
1 ms |
1228 KB |
Output is correct |
| 30 |
Correct |
2 ms |
1228 KB |
Output is correct |
| 31 |
Correct |
1 ms |
1356 KB |
Output is correct |
| 32 |
Correct |
1 ms |
1356 KB |
Output is correct |
| 33 |
Correct |
12 ms |
6348 KB |
Output is correct |
| 34 |
Correct |
12 ms |
6280 KB |
Output is correct |
| 35 |
Correct |
25 ms |
6348 KB |
Output is correct |
| 36 |
Correct |
15 ms |
7216 KB |
Output is correct |
| 37 |
Correct |
17 ms |
7136 KB |
Output is correct |
| 38 |
Correct |
33 ms |
7236 KB |
Output is correct |
| 39 |
Correct |
19 ms |
8128 KB |
Output is correct |
| 40 |
Correct |
19 ms |
8120 KB |
Output is correct |
| 41 |
Correct |
43 ms |
8012 KB |
Output is correct |
| 42 |
Correct |
22 ms |
8908 KB |
Output is correct |
| 43 |
Correct |
23 ms |
8932 KB |
Output is correct |
| 44 |
Correct |
54 ms |
8908 KB |
Output is correct |
| 45 |
Incorrect |
23 ms |
9540 KB |
Output isn't correct |
| 46 |
Incorrect |
48 ms |
9660 KB |
Output isn't correct |
| 47 |
Incorrect |
39 ms |
9672 KB |
Output isn't correct |
| 48 |
Incorrect |
27 ms |
10292 KB |
Output isn't correct |
| 49 |
Incorrect |
56 ms |
10324 KB |
Output isn't correct |
| 50 |
Incorrect |
44 ms |
10240 KB |
Output isn't correct |
| 51 |
Incorrect |
36 ms |
10956 KB |
Output isn't correct |
| 52 |
Incorrect |
69 ms |
10904 KB |
Output isn't correct |
| 53 |
Incorrect |
47 ms |
10920 KB |
Output isn't correct |
| 54 |
Incorrect |
42 ms |
11588 KB |
Output isn't correct |
| 55 |
Incorrect |
78 ms |
11816 KB |
Output isn't correct |
| 56 |
Incorrect |
59 ms |
11624 KB |
Output isn't correct |
| 57 |
Incorrect |
41 ms |
12236 KB |
Output isn't correct |
| 58 |
Incorrect |
90 ms |
12248 KB |
Output isn't correct |
| 59 |
Incorrect |
69 ms |
12300 KB |
Output isn't correct |
| 60 |
Incorrect |
48 ms |
12940 KB |
Output isn't correct |
| 61 |
Incorrect |
110 ms |
13020 KB |
Output isn't correct |
| 62 |
Incorrect |
76 ms |
12992 KB |
Output isn't correct |
| 63 |
Incorrect |
100 ms |
12912 KB |
Output isn't correct |
| 64 |
Incorrect |
236 ms |
13020 KB |
Output isn't correct |
| 65 |
Incorrect |
242 ms |
12996 KB |
Output isn't correct |
| 66 |
Incorrect |
120 ms |
12992 KB |
Output isn't correct |
| 67 |
Incorrect |
230 ms |
12996 KB |
Output isn't correct |
| 68 |
Incorrect |
64 ms |
13012 KB |
Output isn't correct |
| 69 |
Correct |
72 ms |
13060 KB |
Output is correct |
| 70 |
Correct |
66 ms |
12948 KB |
Output is correct |
| 71 |
Correct |
72 ms |
13032 KB |
Output is correct |
| 72 |
Incorrect |
72 ms |
12992 KB |
Output isn't correct |
| 73 |
Correct |
62 ms |
13528 KB |
Output is correct |
| 74 |
Incorrect |
150 ms |
13512 KB |
Output isn't correct |
| 75 |
Incorrect |
156 ms |
13564 KB |
Output isn't correct |
| 76 |
Incorrect |
152 ms |
13508 KB |
Output isn't correct |
| 77 |
Incorrect |
150 ms |
13508 KB |
Output isn't correct |
| 78 |
Incorrect |
92 ms |
13420 KB |
Output isn't correct |
| 79 |
Incorrect |
96 ms |
13484 KB |
Output isn't correct |
| 80 |
Incorrect |
85 ms |
13508 KB |
Output isn't correct |
| 81 |
Incorrect |
86 ms |
13316 KB |
Output isn't correct |
| 82 |
Incorrect |
120 ms |
13420 KB |
Output isn't correct |
| 83 |
Incorrect |
101 ms |
13252 KB |
Output isn't correct |
| 84 |
Incorrect |
123 ms |
13344 KB |
Output isn't correct |
| 85 |
Incorrect |
102 ms |
13272 KB |
Output isn't correct |
| 86 |
Incorrect |
113 ms |
13344 KB |
Output isn't correct |
| 87 |
Incorrect |
134 ms |
13252 KB |
Output isn't correct |
| 88 |
Incorrect |
137 ms |
13252 KB |
Output isn't correct |
| 89 |
Incorrect |
107 ms |
13380 KB |
Output isn't correct |
| 90 |
Incorrect |
106 ms |
13168 KB |
Output isn't correct |
| 91 |
Incorrect |
108 ms |
13276 KB |
Output isn't correct |
| 92 |
Incorrect |
132 ms |
13156 KB |
Output isn't correct |
