oj.uz

답안 #1092620

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
1092620 2024-09-24T15:10:27 Z 4QT0R Mecho (IOI09_mecho) C++17
60 / 100
 134 ms 7008 KB 
#include <bits/stdc++.h>
using namespace std;
#define pii pair<int,int>

char tab[802][802];
int xcor[4]={0,1,0,-1};
int ycor[4]={1,0,-1,0};

int dist[802][802];
int oo=1e9;
int n,s;

void prep(){
	queue<pii> q;
	for (int i = 1; i<=n; i++){
		for (int j = 1; j<=n; j++){
			dist[i][j]=oo;
			if (tab[i][j]=='H'){
				q.push({i,j});
				dist[i][j]=0;
			}
		}
	}
	while(q.size()){
		auto [x,y]=q.front();
		q.pop();
		for (int i = 0; i<4; i++){
			int u=x+xcor[i];
			int v=y+ycor[i];
			if (tab[u][v]=='G' && dist[u][v]>dist[x][y]+1){
				dist[u][v]=dist[x][y]+1;
				q.push({u,v});
			}
		}
	}
}

int vis[802][802];
int iter=0;
pii st,nd;

bool bfs(int waiting){
	queue<pair<pii,int>> q;
	if (dist[st.first][st.second]<=waiting)return false;
	q.push({st,0});
	while(q.size()){
		auto [pol,d]=q.front();
		if (pol==nd)return true;
		q.pop();
		for (int i = 0; i<4; i++){
			int u=pol.first+xcor[i];
			int v=pol.second+ycor[i];
			if ((tab[u][v]=='G'||tab[u][v]=='D') && vis[u][v]!=iter && (dist[u][v]>waiting+(d+1)/s)){
				vis[u][v]=iter;
				q.push({{u,v},d+1});
			}
		}
	}
	return false;
}

int main(){
	ios_base::sync_with_stdio(0);
	cin.tie(0);

	cin >> n >> s;
	for (int i = 1; i<=n; i++){
		for (int j = 1; j<=n; j++){
			cin >> tab[i][j];
			if (tab[i][j]=='M')st={i,j};
			if (tab[i][j]=='D')nd={i,j};
		}
	}
	prep();
	int l=-1,p=1e4,md;
	while(l<p){
		md=(l+p+1)/2;
		iter++;
		if (bfs(md))l=md;
		else p=md-1;
	}
	cout << l << '\n';
}

Subtask #1
60.0 / 100.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 600 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 1 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 1 ms 348 KB Output is correct
7 Correct 89 ms 5716 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Correct 0 ms 344 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Incorrect 1 ms 600 KB Output isn't correct
13 Incorrect 0 ms 604 KB Output isn't correct
14 Correct 1 ms 604 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 1 ms 348 KB Output is correct
18 Correct 0 ms 604 KB Output is correct
19 Correct 0 ms 604 KB Output is correct
20 Correct 1 ms 600 KB Output is correct
21 Correct 0 ms 600 KB Output is correct
22 Correct 0 ms 604 KB Output is correct
23 Correct 0 ms 604 KB Output is correct
24 Correct 0 ms 604 KB Output is correct
25 Correct 1 ms 604 KB Output is correct
26 Correct 1 ms 600 KB Output is correct
27 Correct 0 ms 604 KB Output is correct
28 Correct 1 ms 604 KB Output is correct
29 Correct 1 ms 604 KB Output is correct
30 Correct 0 ms 604 KB Output is correct
31 Correct 0 ms 612 KB Output is correct
32 Correct 1 ms 608 KB Output is correct
33 Incorrect 3 ms 1916 KB Output isn't correct
34 Incorrect 3 ms 1892 KB Output isn't correct
35 Correct 15 ms 3012 KB Output is correct
36 Incorrect 4 ms 2148 KB Output isn't correct
37 Incorrect 4 ms 2148 KB Output isn't correct
38 Correct 17 ms 3428 KB Output is correct
39 Incorrect 4 ms 2404 KB Output isn't correct
40 Incorrect 5 ms 2404 KB Output isn't correct
41 Correct 23 ms 3708 KB Output is correct
42 Incorrect 5 ms 2648 KB Output isn't correct
43 Incorrect 5 ms 2652 KB Output isn't correct
44 Correct 25 ms 4256 KB Output is correct
45 Incorrect 6 ms 2908 KB Output isn't correct
46 Incorrect 6 ms 2908 KB Output isn't correct
47 Correct 29 ms 4444 KB Output is correct
48 Incorrect 7 ms 3160 KB Output isn't correct
49 Incorrect 7 ms 3064 KB Output isn't correct
50 Correct 35 ms 5056 KB Output is correct
51 Incorrect 8 ms 3420 KB Output isn't correct
52 Incorrect 7 ms 3420 KB Output isn't correct
53 Correct 43 ms 5244 KB Output is correct
54 Incorrect 9 ms 3676 KB Output isn't correct
55 Incorrect 11 ms 3672 KB Output isn't correct
56 Correct 52 ms 5696 KB Output is correct
57 Incorrect 11 ms 3928 KB Output isn't correct
58 Incorrect 17 ms 3932 KB Output isn't correct
59 Correct 58 ms 6312 KB Output is correct
60 Incorrect 17 ms 4188 KB Output isn't correct
61 Incorrect 11 ms 4184 KB Output isn't correct
62 Correct 76 ms 6748 KB Output is correct
63 Correct 70 ms 6748 KB Output is correct
64 Correct 134 ms 6484 KB Output is correct
65 Correct 112 ms 6748 KB Output is correct
66 Correct 82 ms 6736 KB Output is correct
67 Correct 77 ms 6736 KB Output is correct
68 Correct 34 ms 6744 KB Output is correct
69 Correct 33 ms 6740 KB Output is correct
70 Correct 25 ms 6736 KB Output is correct
71 Correct 30 ms 6736 KB Output is correct
72 Incorrect 22 ms 4692 KB Output isn't correct
73 Incorrect 42 ms 7004 KB Output isn't correct
74 Correct 37 ms 7000 KB Output is correct
75 Correct 45 ms 7000 KB Output is correct
76 Correct 40 ms 7008 KB Output is correct
77 Correct 42 ms 6996 KB Output is correct
78 Correct 48 ms 5696 KB Output is correct
79 Correct 31 ms 5200 KB Output is correct
80 Correct 44 ms 5208 KB Output is correct
81 Correct 43 ms 5380 KB Output is correct
82 Correct 37 ms 5408 KB Output is correct
83 Correct 48 ms 5624 KB Output is correct
84 Correct 45 ms 5468 KB Output is correct
85 Correct 46 ms 5464 KB Output is correct
86 Correct 54 ms 5468 KB Output is correct
87 Correct 45 ms 5452 KB Output is correct
88 Correct 48 ms 5716 KB Output is correct
89 Correct 51 ms 5468 KB Output is correct
90 Correct 52 ms 5460 KB Output is correct
91 Correct 77 ms 5712 KB Output is correct
92 Correct 62 ms 5712 KB Output is correct