답안 #73773 :: oj.uz

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
73773	2018-08-29T02:10:51 Z	TuGSGeReL	Mecho (IOI09_mecho)	C++14	100 / 100	456 ms	6708 KB

mecho

#include<bits/stdc++.h>
#define ll long long
#define mp make_pair
#define pub push_back
#define pob pop_back
#define ss second
#define ff first
#define ext exit(0)
using namespace std;
int n,s,l,r,x,y,zu[801][801],bo[801][801],ax,ay,h[4]={0,0,-1,1},v[4]={-1,1,0,0};
char c[801][801];
queue<pair<pair<int,int>,int> >q,p;
void dfs(){
	memset(bo,0,sizeof bo);
	bo[q.front().ff.ff][q.front().ff.ss]=1;
	zu[q.front().ff.ff][q.front().ff.ss]=0;
	while(!q.empty()){
		int ii=q.front().ff.ff,jj=q.front().ff.ss,zz=q.front().ss;
		for(int k=0;k<4;k++){
			if(ii+h[k]<=n && ii+h[k]>0 && jj+v[k]<=n && jj+v[k]>0 && c[ii+h[k]][jj+v[k]]!='T' && c[ii+h[k]][jj+v[k]]!='D' && !bo[ii+h[k]][jj+v[k]] && zu[ii+h[k]][jj+v[k]]>zz+s){
				bo[ii+h[k]][jj+v[k]]=1;
				zu[ii+h[k]][jj+v[k]]=zz+s;
				q.push(mp(mp(ii+h[k],jj+v[k]),zz+s));
			}
		}
		q.pop();
	}
}
bool can(int k){
	q=p;
	if(k>=zu[x][y]) return 0;
	memset(bo,0,sizeof bo);
	q.push(mp(mp(x,y),k));
	bo[x][y]=1;
	while(!q.empty()){
		int xx=q.front().ff.ff,yy=q.front().ff.ss,kk=q.front().ss;
		for(int i=0;i<4;i++){
			if(bo[ax][ay]) return 1;
			if(xx+h[i]>0 && xx+h[i]<=n && yy+v[i]>0 && yy+v[i]<=n && c[xx+h[i]][yy+v[i]]!='T' && !bo[xx+h[i]][yy+v[i]] && zu[xx+h[i]][yy+v[i]]>kk+1){
				bo[xx+h[i]][yy+v[i]]=1;
				q.push(mp(mp(xx+h[i],yy+v[i]),kk+1));
			}
		}
		q.pop();
	}
	return 0;
}
int main (){
	ios_base::sync_with_stdio(false);
	cin.tie(NULL);
	cin>>n>>s;
	for(int i=1;i<=n;i++){
		for(int j=1;j<=n;j++){
			cin>>c[i][j];
			if(c[i][j]=='M') x=i,y=j;
			if(c[i][j]=='D') ax=i,ay=j;
			zu[i][j]=1e9;
		}
	}
	for(int i=1;i<=n;i++) for(int j=1;j<=n;j++) if(c[i][j]=='H')q.push(mp(mp(i,j),0));
	dfs();
	if(can(0)==0) {
		cout<<-1;
		ext;
	}
	l=0,r=1e9;
	while(l+1!=r){
		ll mid=(l+r)/2;
		if(can(mid)) l=mid;
		else r=mid;
	}
	cout<<l/s;
}

Subtask #1
100.0 / 100.0

#	결과	실행 시간	메모리	Grader output
1	Correct	5 ms	2936 KB	Output is correct
2	Correct	7 ms	3048 KB	Output is correct
3	Correct	7 ms	3048 KB	Output is correct
4	Correct	6 ms	3048 KB	Output is correct
5	Correct	7 ms	3048 KB	Output is correct
6	Correct	6 ms	3152 KB	Output is correct
7	Correct	260 ms	6348 KB	Output is correct
8	Correct	5 ms	6348 KB	Output is correct
9	Correct	6 ms	6348 KB	Output is correct
10	Correct	7 ms	6348 KB	Output is correct
11	Correct	6 ms	6348 KB	Output is correct
12	Correct	9 ms	6348 KB	Output is correct
13	Correct	6 ms	6348 KB	Output is correct
14	Correct	5 ms	6348 KB	Output is correct
15	Correct	5 ms	6348 KB	Output is correct
16	Correct	6 ms	6348 KB	Output is correct
17	Correct	5 ms	6348 KB	Output is correct
18	Correct	5 ms	6348 KB	Output is correct
19	Correct	6 ms	6348 KB	Output is correct
20	Correct	6 ms	6348 KB	Output is correct
21	Correct	5 ms	6348 KB	Output is correct
22	Correct	7 ms	6348 KB	Output is correct
23	Correct	5 ms	6348 KB	Output is correct
24	Correct	6 ms	6348 KB	Output is correct
25	Correct	6 ms	6348 KB	Output is correct
26	Correct	7 ms	6348 KB	Output is correct
27	Correct	6 ms	6348 KB	Output is correct
28	Correct	7 ms	6348 KB	Output is correct
29	Correct	5 ms	6348 KB	Output is correct
30	Correct	7 ms	6348 KB	Output is correct
31	Correct	6 ms	6348 KB	Output is correct
32	Correct	6 ms	6348 KB	Output is correct
33	Correct	12 ms	6348 KB	Output is correct
34	Correct	12 ms	6348 KB	Output is correct
35	Correct	60 ms	6348 KB	Output is correct
36	Correct	13 ms	6348 KB	Output is correct
37	Correct	17 ms	6348 KB	Output is correct
38	Correct	124 ms	6348 KB	Output is correct
39	Correct	13 ms	6348 KB	Output is correct
40	Correct	14 ms	6348 KB	Output is correct
41	Correct	118 ms	6348 KB	Output is correct
42	Correct	17 ms	6348 KB	Output is correct
43	Correct	20 ms	6348 KB	Output is correct
44	Correct	120 ms	6348 KB	Output is correct
45	Correct	18 ms	6348 KB	Output is correct
46	Correct	22 ms	6348 KB	Output is correct
47	Correct	217 ms	6348 KB	Output is correct
48	Correct	21 ms	6348 KB	Output is correct
49	Correct	21 ms	6348 KB	Output is correct
50	Correct	214 ms	6348 KB	Output is correct
51	Correct	24 ms	6348 KB	Output is correct
52	Correct	24 ms	6348 KB	Output is correct
53	Correct	254 ms	6348 KB	Output is correct
54	Correct	24 ms	6348 KB	Output is correct
55	Correct	30 ms	6348 KB	Output is correct
56	Correct	299 ms	6348 KB	Output is correct
57	Correct	27 ms	6348 KB	Output is correct
58	Correct	25 ms	6348 KB	Output is correct
59	Correct	339 ms	6348 KB	Output is correct
60	Correct	26 ms	6348 KB	Output is correct
61	Correct	29 ms	6348 KB	Output is correct
62	Correct	402 ms	6348 KB	Output is correct
63	Correct	184 ms	6396 KB	Output is correct
64	Correct	456 ms	6396 KB	Output is correct
65	Correct	301 ms	6396 KB	Output is correct
66	Correct	229 ms	6396 KB	Output is correct
67	Correct	49 ms	6396 KB	Output is correct
68	Correct	111 ms	6396 KB	Output is correct
69	Correct	87 ms	6396 KB	Output is correct
70	Correct	71 ms	6396 KB	Output is correct
71	Correct	74 ms	6396 KB	Output is correct
72	Correct	51 ms	6396 KB	Output is correct
73	Correct	72 ms	6652 KB	Output is correct
74	Correct	207 ms	6652 KB	Output is correct
75	Correct	127 ms	6652 KB	Output is correct
76	Correct	115 ms	6652 KB	Output is correct
77	Correct	144 ms	6652 KB	Output is correct
78	Correct	48 ms	6652 KB	Output is correct
79	Correct	141 ms	6652 KB	Output is correct
80	Correct	145 ms	6652 KB	Output is correct
81	Correct	165 ms	6652 KB	Output is correct
82	Correct	197 ms	6708 KB	Output is correct
83	Correct	195 ms	6708 KB	Output is correct
84	Correct	278 ms	6708 KB	Output is correct
85	Correct	204 ms	6708 KB	Output is correct
86	Correct	210 ms	6708 KB	Output is correct
87	Correct	246 ms	6708 KB	Output is correct
88	Correct	233 ms	6708 KB	Output is correct
89	Correct	311 ms	6708 KB	Output is correct
90	Correct	284 ms	6708 KB	Output is correct
91	Correct	268 ms	6708 KB	Output is correct
92	Correct	234 ms	6708 KB	Output is correct

답안 #73773

Compilation message

Subtask #1 100.0 / 100.0

Subtask #1
100.0 / 100.0