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답안 #533469

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
533469 2022-03-06T06:08:46 Z Stro256 Mecho (IOI09_mecho) C++14
100 / 100
 177 ms 11004 KB 
#include <bits/stdc++.h>
using namespace std;

const int mxN=800;
int n, s, d1[mxN][mxN], d2[mxN][mxN], si, sj, ti, tj, lb=0, rb=mxN*mxN, nb[4][2]={{0, 1}, {1, 0}, {0, -1}, {-1, 0}};
string g[mxN];
array<int, 2> qu[mxN*mxN];

void bfs(int d[mxN][mxN], int a) {
	int qt=0;
	for(int i=0; i<n; ++i)
		for(int j=0; j<n; ++j)
			if(!d[i][j])
				qu[qt++]={i, j};
	for(int i=0; i<qt; ++i) {
		array<int, 2> u=qu[i];
		if(a>=0&&d[u[0]][u[1]]/s+a>=d1[u[0]][u[1]])
			continue;
		for(int j=0; j<4; ++j) {
			int ni=u[0]+nb[j][0], nj=u[1]+nb[j][1];
			if(ni>=0&&ni<n&&nj>=0&&nj<n&&g[ni][nj]!='T'&&(a>=0||g[ni][nj]!='D')&&d[ni][nj]>1e7) {
				d[ni][nj]=d[u[0]][u[1]]+1;
				qu[qt++]={ni, nj};
			}
		}
	}
}

int main() {
	ios_base::sync_with_stdio(0);
	cin.tie(0);
	
	cin >> n >> s;
	for(int i=0; i<n; ++i)
		cin >> g[i];
	memset(d1, 1, sizeof(d1));
	for(int i=0; i<n; ++i) {
		for(int j=0; j<n; ++j) {
			if(g[i][j]=='M') {
				si=i;
				sj=j;
			} else if(g[i][j]=='D') {
				ti=i;
				tj=j;
			} else if(g[i][j]=='H')
				d1[i][j]=0;
		}
	}
	bfs(d1, -1);
	while(lb<=rb) {
		int mb=(lb+rb)/2;
		memset(d2, 1, sizeof(d2));
		d2[si][sj]=0;
		bfs(d2, mb);
		if(d2[ti][tj]<1e7)
			lb=mb+1;
		else
			rb=mb-1;
	}
	cout << rb;
}

Subtask #1
100.0 / 100.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 5324 KB Output is correct
2 Correct 3 ms 5324 KB Output is correct
3 Correct 3 ms 5324 KB Output is correct
4 Correct 4 ms 5324 KB Output is correct
5 Correct 4 ms 5324 KB Output is correct
6 Correct 4 ms 5324 KB Output is correct
7 Correct 75 ms 11004 KB Output is correct
8 Correct 4 ms 5324 KB Output is correct
9 Correct 3 ms 5324 KB Output is correct
10 Correct 4 ms 5324 KB Output is correct
11 Correct 3 ms 5324 KB Output is correct
12 Correct 4 ms 5324 KB Output is correct
13 Correct 4 ms 5324 KB Output is correct
14 Correct 4 ms 5324 KB Output is correct
15 Correct 4 ms 5324 KB Output is correct
16 Correct 4 ms 5324 KB Output is correct
17 Correct 4 ms 5324 KB Output is correct
18 Correct 3 ms 5336 KB Output is correct
19 Correct 4 ms 5324 KB Output is correct
20 Correct 3 ms 5324 KB Output is correct
21 Correct 4 ms 5324 KB Output is correct
22 Correct 4 ms 5324 KB Output is correct
23 Correct 4 ms 5324 KB Output is correct
24 Correct 4 ms 5324 KB Output is correct
25 Correct 4 ms 5324 KB Output is correct
26 Correct 4 ms 5372 KB Output is correct
27 Correct 4 ms 5324 KB Output is correct
28 Correct 4 ms 5324 KB Output is correct
29 Correct 4 ms 5324 KB Output is correct
30 Correct 4 ms 5324 KB Output is correct
31 Correct 4 ms 5324 KB Output is correct
32 Correct 4 ms 5324 KB Output is correct
33 Correct 9 ms 5964 KB Output is correct
34 Correct 7 ms 5836 KB Output is correct
35 Correct 20 ms 6092 KB Output is correct
36 Correct 8 ms 6120 KB Output is correct
37 Correct 9 ms 6116 KB Output is correct
38 Correct 27 ms 6348 KB Output is correct
39 Correct 12 ms 6348 KB Output is correct
40 Correct 11 ms 6348 KB Output is correct
41 Correct 32 ms 6732 KB Output is correct
42 Correct 11 ms 6600 KB Output is correct
43 Correct 11 ms 6596 KB Output is correct
44 Correct 39 ms 6988 KB Output is correct
45 Correct 12 ms 6732 KB Output is correct
46 Correct 14 ms 6844 KB Output is correct
47 Correct 46 ms 7372 KB Output is correct
48 Correct 13 ms 7068 KB Output is correct
49 Correct 19 ms 7116 KB Output is correct
50 Correct 61 ms 7828 KB Output is correct
51 Correct 14 ms 7372 KB Output is correct
52 Correct 15 ms 7384 KB Output is correct
53 Correct 70 ms 8248 KB Output is correct
54 Correct 17 ms 7756 KB Output is correct
55 Correct 17 ms 7784 KB Output is correct
56 Correct 87 ms 8780 KB Output is correct
57 Correct 19 ms 8140 KB Output is correct
58 Correct 22 ms 8140 KB Output is correct
59 Correct 102 ms 9216 KB Output is correct
60 Correct 25 ms 8536 KB Output is correct
61 Correct 26 ms 8524 KB Output is correct
62 Correct 110 ms 9632 KB Output is correct
63 Correct 99 ms 8988 KB Output is correct
64 Correct 177 ms 8992 KB Output is correct
65 Correct 142 ms 8988 KB Output is correct
66 Correct 119 ms 8908 KB Output is correct
67 Correct 109 ms 8984 KB Output is correct
68 Correct 51 ms 8992 KB Output is correct
69 Correct 47 ms 8908 KB Output is correct
70 Correct 39 ms 8952 KB Output is correct
71 Correct 45 ms 8992 KB Output is correct
72 Correct 35 ms 8876 KB Output is correct
73 Correct 36 ms 10948 KB Output is correct
74 Correct 54 ms 10904 KB Output is correct
75 Correct 67 ms 10956 KB Output is correct
76 Correct 65 ms 10956 KB Output is correct
77 Correct 58 ms 10952 KB Output is correct
78 Correct 75 ms 10964 KB Output is correct
79 Correct 48 ms 10960 KB Output is correct
80 Correct 57 ms 10964 KB Output is correct
81 Correct 65 ms 10876 KB Output is correct
82 Correct 57 ms 10956 KB Output is correct
83 Correct 72 ms 10956 KB Output is correct
84 Correct 63 ms 10956 KB Output is correct
85 Correct 70 ms 10956 KB Output is correct
86 Correct 72 ms 10948 KB Output is correct
87 Correct 69 ms 10820 KB Output is correct
88 Correct 73 ms 10956 KB Output is correct
89 Correct 73 ms 10956 KB Output is correct
90 Correct 74 ms 10956 KB Output is correct
91 Correct 79 ms 10972 KB Output is correct
92 Correct 82 ms 10960 KB Output is correct