답안 #79405 :: oj.uz

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
79405	2018-10-13T07:56:42 Z	tmwilliamlin168	Mecho (IOI09_mecho)	C++14	100 / 100	290 ms	11352 KB

mecho

#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)
//			cout << u[0] << " " << u[1] << endl;
		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;
//		cout << "bs " << mb << endl;
		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	10 ms	5368 KB	Output is correct
2	Correct	9 ms	5540 KB	Output is correct
3	Correct	9 ms	5540 KB	Output is correct
4	Correct	8 ms	5540 KB	Output is correct
5	Correct	8 ms	5540 KB	Output is correct
6	Correct	9 ms	5540 KB	Output is correct
7	Correct	130 ms	11128 KB	Output is correct
8	Correct	8 ms	11128 KB	Output is correct
9	Correct	9 ms	11128 KB	Output is correct
10	Correct	8 ms	11128 KB	Output is correct
11	Correct	9 ms	11128 KB	Output is correct
12	Correct	8 ms	11128 KB	Output is correct
13	Correct	9 ms	11128 KB	Output is correct
14	Correct	9 ms	11128 KB	Output is correct
15	Correct	9 ms	11128 KB	Output is correct
16	Correct	9 ms	11128 KB	Output is correct
17	Correct	8 ms	11128 KB	Output is correct
18	Correct	8 ms	11128 KB	Output is correct
19	Correct	8 ms	11128 KB	Output is correct
20	Correct	8 ms	11128 KB	Output is correct
21	Correct	9 ms	11128 KB	Output is correct
22	Correct	8 ms	11128 KB	Output is correct
23	Correct	8 ms	11128 KB	Output is correct
24	Correct	8 ms	11128 KB	Output is correct
25	Correct	9 ms	11128 KB	Output is correct
26	Correct	9 ms	11128 KB	Output is correct
27	Correct	9 ms	11128 KB	Output is correct
28	Correct	9 ms	11128 KB	Output is correct
29	Correct	9 ms	11128 KB	Output is correct
30	Correct	8 ms	11128 KB	Output is correct
31	Correct	8 ms	11128 KB	Output is correct
32	Correct	9 ms	11128 KB	Output is correct
33	Correct	14 ms	11128 KB	Output is correct
34	Correct	13 ms	11128 KB	Output is correct
35	Correct	35 ms	11128 KB	Output is correct
36	Correct	15 ms	11128 KB	Output is correct
37	Correct	16 ms	11128 KB	Output is correct
38	Correct	44 ms	11128 KB	Output is correct
39	Correct	16 ms	11128 KB	Output is correct
40	Correct	17 ms	11128 KB	Output is correct
41	Correct	54 ms	11128 KB	Output is correct
42	Correct	20 ms	11128 KB	Output is correct
43	Correct	19 ms	11128 KB	Output is correct
44	Correct	106 ms	11128 KB	Output is correct
45	Correct	23 ms	11128 KB	Output is correct
46	Correct	25 ms	11128 KB	Output is correct
47	Correct	77 ms	11128 KB	Output is correct
48	Correct	24 ms	11128 KB	Output is correct
49	Correct	24 ms	11128 KB	Output is correct
50	Correct	135 ms	11128 KB	Output is correct
51	Correct	26 ms	11128 KB	Output is correct
52	Correct	26 ms	11128 KB	Output is correct
53	Correct	134 ms	11128 KB	Output is correct
54	Correct	27 ms	11128 KB	Output is correct
55	Correct	27 ms	11128 KB	Output is correct
56	Correct	173 ms	11128 KB	Output is correct
57	Correct	34 ms	11128 KB	Output is correct
58	Correct	34 ms	11128 KB	Output is correct
59	Correct	195 ms	11128 KB	Output is correct
60	Correct	35 ms	11128 KB	Output is correct
61	Correct	39 ms	11128 KB	Output is correct
62	Correct	209 ms	11128 KB	Output is correct
63	Correct	147 ms	11128 KB	Output is correct
64	Correct	290 ms	11128 KB	Output is correct
65	Correct	229 ms	11128 KB	Output is correct
66	Correct	188 ms	11128 KB	Output is correct
67	Correct	159 ms	11128 KB	Output is correct
68	Correct	74 ms	11128 KB	Output is correct
69	Correct	72 ms	11128 KB	Output is correct
70	Correct	57 ms	11128 KB	Output is correct
71	Correct	63 ms	11128 KB	Output is correct
72	Correct	49 ms	11128 KB	Output is correct
73	Correct	59 ms	11260 KB	Output is correct
74	Correct	90 ms	11260 KB	Output is correct
75	Correct	109 ms	11260 KB	Output is correct
76	Correct	93 ms	11260 KB	Output is correct
77	Correct	103 ms	11260 KB	Output is correct
78	Correct	115 ms	11260 KB	Output is correct
79	Correct	76 ms	11260 KB	Output is correct
80	Correct	93 ms	11264 KB	Output is correct
81	Correct	116 ms	11264 KB	Output is correct
82	Correct	111 ms	11264 KB	Output is correct
83	Correct	125 ms	11264 KB	Output is correct
84	Correct	116 ms	11264 KB	Output is correct
85	Correct	132 ms	11264 KB	Output is correct
86	Correct	122 ms	11264 KB	Output is correct
87	Correct	115 ms	11264 KB	Output is correct
88	Correct	124 ms	11264 KB	Output is correct
89	Correct	125 ms	11352 KB	Output is correct
90	Correct	139 ms	11352 KB	Output is correct
91	Correct	142 ms	11352 KB	Output is correct
92	Correct	145 ms	11352 KB	Output is correct

답안 #79405

Compilation message

Subtask #1 100.0 / 100.0

Subtask #1
100.0 / 100.0