oj.uz

Submission #79404

# Submission time Handle Problem Language Result Execution time Memory
79404 2018-10-13T07:49:26 Z tmwilliamlin168 Mecho (IOI09_mecho) C++14
79 / 100
 282 ms 41540 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&&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||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;
		}
	}
//	cout << "hi1" << endl;
	bfs(d1, 0);
//	cout << "hi2" << endl;
	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
79.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 9 ms 5368 KB Output is correct
2 Correct 9 ms 5504 KB Output is correct
3 Correct 8 ms 5556 KB Output is correct
4 Correct 9 ms 5556 KB Output is correct
5 Incorrect 9 ms 5584 KB Output isn't correct
6 Correct 9 ms 5784 KB Output is correct
7 Correct 131 ms 11900 KB Output is correct
8 Correct 9 ms 11900 KB Output is correct
9 Correct 9 ms 11900 KB Output is correct
10 Correct 8 ms 11900 KB Output is correct
11 Correct 9 ms 11900 KB Output is correct
12 Correct 9 ms 11900 KB Output is correct
13 Incorrect 9 ms 11900 KB Output isn't correct
14 Correct 2 ms 11900 KB Output is correct
15 Correct 9 ms 11900 KB Output is correct
16 Correct 9 ms 11900 KB Output is correct
17 Correct 8 ms 11900 KB Output is correct
18 Correct 8 ms 11900 KB Output is correct
19 Correct 9 ms 11900 KB Output is correct
20 Correct 9 ms 11900 KB Output is correct
21 Correct 9 ms 11900 KB Output is correct
22 Correct 9 ms 11900 KB Output is correct
23 Correct 8 ms 11900 KB Output is correct
24 Correct 8 ms 11900 KB Output is correct
25 Correct 9 ms 11900 KB Output is correct
26 Correct 10 ms 11900 KB Output is correct
27 Correct 11 ms 11900 KB Output is correct
28 Correct 9 ms 11900 KB Output is correct
29 Correct 9 ms 11900 KB Output is correct
30 Correct 8 ms 11900 KB Output is correct
31 Correct 9 ms 11900 KB Output is correct
32 Correct 9 ms 11900 KB Output is correct
33 Correct 14 ms 11900 KB Output is correct
34 Correct 13 ms 11900 KB Output is correct
35 Correct 33 ms 11900 KB Output is correct
36 Correct 16 ms 11900 KB Output is correct
37 Correct 17 ms 11900 KB Output is correct
38 Correct 41 ms 11900 KB Output is correct
39 Correct 16 ms 11900 KB Output is correct
40 Correct 18 ms 11900 KB Output is correct
41 Correct 52 ms 11900 KB Output is correct
42 Correct 22 ms 11900 KB Output is correct
43 Correct 18 ms 11900 KB Output is correct
44 Correct 65 ms 11900 KB Output is correct
45 Correct 21 ms 11900 KB Output is correct
46 Correct 27 ms 11900 KB Output is correct
47 Correct 85 ms 11900 KB Output is correct
48 Correct 21 ms 11900 KB Output is correct
49 Correct 23 ms 12172 KB Output is correct
50 Correct 117 ms 13168 KB Output is correct
51 Correct 25 ms 13268 KB Output is correct
52 Correct 26 ms 13684 KB Output is correct
53 Correct 117 ms 14868 KB Output is correct
54 Correct 29 ms 14900 KB Output is correct
55 Correct 28 ms 15384 KB Output is correct
56 Correct 143 ms 16760 KB Output is correct
57 Correct 30 ms 16760 KB Output is correct
58 Correct 33 ms 17408 KB Output is correct
59 Correct 194 ms 18984 KB Output is correct
60 Correct 35 ms 18984 KB Output is correct
61 Correct 38 ms 19524 KB Output is correct
62 Correct 193 ms 21304 KB Output is correct
63 Incorrect 136 ms 21304 KB Output isn't correct
64 Correct 282 ms 21788 KB Output is correct
65 Correct 199 ms 22564 KB Output is correct
66 Correct 155 ms 23188 KB Output is correct
67 Correct 161 ms 23672 KB Output is correct
68 Incorrect 93 ms 24452 KB Output isn't correct
69 Correct 73 ms 24948 KB Output is correct
70 Correct 60 ms 25656 KB Output is correct
71 Correct 71 ms 26268 KB Output is correct
72 Correct 50 ms 26924 KB Output is correct
73 Correct 55 ms 29540 KB Output is correct
74 Correct 83 ms 30168 KB Output is correct
75 Correct 119 ms 30796 KB Output is correct
76 Correct 91 ms 31424 KB Output is correct
77 Correct 92 ms 32116 KB Output is correct
78 Correct 124 ms 32680 KB Output is correct
79 Correct 74 ms 33308 KB Output is correct
80 Correct 86 ms 34032 KB Output is correct
81 Correct 105 ms 34564 KB Output is correct
82 Correct 84 ms 35192 KB Output is correct
83 Incorrect 120 ms 35840 KB Output isn't correct
84 Correct 113 ms 36468 KB Output is correct
85 Correct 114 ms 37096 KB Output is correct
86 Correct 117 ms 37756 KB Output is correct
87 Correct 118 ms 38384 KB Output is correct
88 Incorrect 127 ms 39012 KB Output isn't correct
89 Correct 117 ms 39588 KB Output is correct
90 Correct 117 ms 40284 KB Output is correct
91 Correct 128 ms 40912 KB Output is correct
92 Correct 124 ms 41540 KB Output is correct