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답안 #60054

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
60054 2018-07-23T14:13:25 Z nvmdava Mecho (IOI09_mecho) C++17
100 / 100
 536 ms 6528 KB 
#include <bits/stdc++.h>
#define mp make_pair
#define ff first
#define ss second
using namespace std;
int n,s;
int t[802][802];
char c[802][802];
int dx[4] = {0, 0, 1, -1};
int dy[4] = {1, -1, 0, 0};
int  chk[802][802];
queue<pair<int, int > > q;

bool pos(int x,int y, int now){
	memset(chk,0,sizeof(chk));
	if(now >= t[x][y]){
		return 0;
	}
	chk[x][y] = now;
	q.push(mp(x,y));
	while(!q.empty()){
		x = q.front().ff;
		y = q.front().ss;
		q.pop();
		for(int i = 0; i < 4; i++){
			if(c[x + dx[i]][y + dy[i]]=='D'){
				while(!q.empty()){
					q.pop();
				}
				return 1;
			}
			if(chk[x + dx[i]][y + dy[i]]==0 && t[x + dx[i]][y + dy[i]] > chk[x][y] + 1){
				chk[x + dx[i]][y + dy[i]] = chk[x][y] + 1;
				q.push( mp(x + dx[i] , y + dy[i]) );
			}
		}
	}
	return 0;
}

int main(){
	ios_base::sync_with_stdio(0);
	cin.tie(0);
	cout.tie(0);
	int i,j,xx,yy;
	cin>>n>>s;
	for(i = 1; i <= n; i++){
		for(j = 1; j <= n; j++){
			cin>>c[i][j];
			if(c[i][j]=='H'){
				q.push(mp(i,j));
			} else if(c[i][j]=='M'){
				xx=i;
				yy=j;
			}
		}
	}
	int x,y;
	while(!q.empty()){
		x=q.front().ff;
		y=q.front().ss;
		q.pop();
		for(i=0;i<4;i++){
			if((c[x + dx[i]][y + dy[i]]=='G'||c[x + dx[i]][y + dy[i]]=='M')&&t[x + dx[i]][y + dy[i]]==0){
				t[x + dx[i]][y + dy[i]] = t[x][y]+s;
				q.push(mp(x + dx[i] , y + dy[i]));
			}
		}
	}
	int l = 0 , r = 1e9,m;
	if(pos(xx,yy,0)==0){
		cout<<-1;
		return 0;
	}
	while(l + 1 != r){
		m = (l + r) / 2;
		if(pos(xx,yy,m)){
			l = m;
		} else {
			r = m;
		}
	}
	cout<<l/s;
}

Compilation message

mecho.cpp: In function 'int main()':
mecho.cpp:71:8: warning: 'yy' may be used uninitialized in this function [-Wmaybe-uninitialized]
  if(pos(xx,yy,0)==0){
     ~~~^~~~~~~~~
mecho.cpp:71:8: warning: 'xx' may be used uninitialized in this function [-Wmaybe-uninitialized]

Subtask #1
100.0 / 100.0

# 결과 실행 시간 메모리 Grader output
1 Correct 9 ms 2936 KB Output is correct
2 Correct 10 ms 3048 KB Output is correct
3 Correct 8 ms 3048 KB Output is correct
4 Correct 10 ms 3048 KB Output is correct
5 Correct 11 ms 3048 KB Output is correct
6 Correct 9 ms 3052 KB Output is correct
7 Correct 248 ms 6428 KB Output is correct
8 Correct 5 ms 6428 KB Output is correct
9 Correct 10 ms 6428 KB Output is correct
10 Correct 9 ms 6428 KB Output is correct
11 Correct 9 ms 6428 KB Output is correct
12 Correct 10 ms 6428 KB Output is correct
13 Correct 10 ms 6428 KB Output is correct
14 Correct 6 ms 6428 KB Output is correct
15 Correct 10 ms 6428 KB Output is correct
16 Correct 9 ms 6428 KB Output is correct
17 Correct 9 ms 6428 KB Output is correct
18 Correct 10 ms 6428 KB Output is correct
19 Correct 9 ms 6428 KB Output is correct
20 Correct 10 ms 6428 KB Output is correct
21 Correct 11 ms 6428 KB Output is correct
22 Correct 12 ms 6428 KB Output is correct
23 Correct 10 ms 6428 KB Output is correct
24 Correct 11 ms 6428 KB Output is correct
25 Correct 10 ms 6428 KB Output is correct
26 Correct 10 ms 6428 KB Output is correct
27 Correct 9 ms 6428 KB Output is correct
28 Correct 11 ms 6428 KB Output is correct
29 Correct 10 ms 6428 KB Output is correct
30 Correct 9 ms 6428 KB Output is correct
31 Correct 10 ms 6428 KB Output is correct
32 Correct 11 ms 6428 KB Output is correct
33 Correct 14 ms 6428 KB Output is correct
34 Correct 14 ms 6428 KB Output is correct
35 Correct 87 ms 6428 KB Output is correct
36 Correct 15 ms 6428 KB Output is correct
37 Correct 16 ms 6428 KB Output is correct
38 Correct 87 ms 6428 KB Output is correct
39 Correct 19 ms 6428 KB Output is correct
40 Correct 23 ms 6428 KB Output is correct
41 Correct 148 ms 6428 KB Output is correct
42 Correct 18 ms 6428 KB Output is correct
43 Correct 21 ms 6428 KB Output is correct
44 Correct 171 ms 6428 KB Output is correct
45 Correct 19 ms 6428 KB Output is correct
46 Correct 19 ms 6428 KB Output is correct
47 Correct 177 ms 6428 KB Output is correct
48 Correct 24 ms 6428 KB Output is correct
49 Correct 22 ms 6428 KB Output is correct
50 Correct 300 ms 6428 KB Output is correct
51 Correct 28 ms 6428 KB Output is correct
52 Correct 29 ms 6428 KB Output is correct
53 Correct 308 ms 6428 KB Output is correct
54 Correct 29 ms 6428 KB Output is correct
55 Correct 29 ms 6428 KB Output is correct
56 Correct 316 ms 6428 KB Output is correct
57 Correct 33 ms 6428 KB Output is correct
58 Correct 27 ms 6428 KB Output is correct
59 Correct 341 ms 6428 KB Output is correct
60 Correct 31 ms 6428 KB Output is correct
61 Correct 38 ms 6428 KB Output is correct
62 Correct 441 ms 6428 KB Output is correct
63 Correct 160 ms 6428 KB Output is correct
64 Correct 536 ms 6428 KB Output is correct
65 Correct 357 ms 6428 KB Output is correct
66 Correct 247 ms 6428 KB Output is correct
67 Correct 56 ms 6428 KB Output is correct
68 Correct 123 ms 6428 KB Output is correct
69 Correct 100 ms 6428 KB Output is correct
70 Correct 69 ms 6428 KB Output is correct
71 Correct 76 ms 6428 KB Output is correct
72 Correct 60 ms 6428 KB Output is correct
73 Correct 86 ms 6524 KB Output is correct
74 Correct 180 ms 6524 KB Output is correct
75 Correct 138 ms 6524 KB Output is correct
76 Correct 153 ms 6524 KB Output is correct
77 Correct 149 ms 6524 KB Output is correct
78 Correct 57 ms 6524 KB Output is correct
79 Correct 172 ms 6528 KB Output is correct
80 Correct 131 ms 6528 KB Output is correct
81 Correct 176 ms 6528 KB Output is correct
82 Correct 152 ms 6528 KB Output is correct
83 Correct 174 ms 6528 KB Output is correct
84 Correct 236 ms 6528 KB Output is correct
85 Correct 210 ms 6528 KB Output is correct
86 Correct 208 ms 6528 KB Output is correct
87 Correct 182 ms 6528 KB Output is correct
88 Correct 234 ms 6528 KB Output is correct
89 Correct 306 ms 6528 KB Output is correct
90 Correct 224 ms 6528 KB Output is correct
91 Correct 275 ms 6528 KB Output is correct
92 Correct 189 ms 6528 KB Output is correct