| # |
Submission time |
Handle |
Problem |
Language |
Result |
Execution time |
Memory |
| 60050 |
2018-07-23T14:04:20 Z |
nvmdava |
Mecho (IOI09_mecho) |
C++17 |
|
476 ms |
6652 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));
chk[x][y] = now;
while(!q.empty()){
q.pop();
}
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'){
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'&&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:68:8: warning: 'yy' may be used uninitialized in this function [-Wmaybe-uninitialized]
if(pos(xx,yy,0)==0){
~~~^~~~~~~~~
mecho.cpp:68:8: warning: 'xx' may be used uninitialized in this function [-Wmaybe-uninitialized]
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
8 ms |
2808 KB |
Output is correct |
| 2 |
Correct |
9 ms |
2916 KB |
Output is correct |
| 3 |
Correct |
9 ms |
2992 KB |
Output is correct |
| 4 |
Correct |
7 ms |
2992 KB |
Output is correct |
| 5 |
Correct |
10 ms |
3068 KB |
Output is correct |
| 6 |
Correct |
12 ms |
3272 KB |
Output is correct |
| 7 |
Correct |
273 ms |
6380 KB |
Output is correct |
| 8 |
Correct |
5 ms |
6380 KB |
Output is correct |
| 9 |
Correct |
11 ms |
6380 KB |
Output is correct |
| 10 |
Correct |
10 ms |
6380 KB |
Output is correct |
| 11 |
Correct |
9 ms |
6380 KB |
Output is correct |
| 12 |
Incorrect |
11 ms |
6380 KB |
Output isn't correct |
| 13 |
Incorrect |
10 ms |
6380 KB |
Output isn't correct |
| 14 |
Correct |
6 ms |
6380 KB |
Output is correct |
| 15 |
Correct |
11 ms |
6380 KB |
Output is correct |
| 16 |
Correct |
10 ms |
6380 KB |
Output is correct |
| 17 |
Correct |
10 ms |
6380 KB |
Output is correct |
| 18 |
Correct |
11 ms |
6380 KB |
Output is correct |
| 19 |
Correct |
11 ms |
6380 KB |
Output is correct |
| 20 |
Correct |
8 ms |
6380 KB |
Output is correct |
| 21 |
Correct |
10 ms |
6380 KB |
Output is correct |
| 22 |
Correct |
10 ms |
6380 KB |
Output is correct |
| 23 |
Correct |
10 ms |
6380 KB |
Output is correct |
| 24 |
Correct |
10 ms |
6380 KB |
Output is correct |
| 25 |
Correct |
9 ms |
6380 KB |
Output is correct |
| 26 |
Correct |
11 ms |
6380 KB |
Output is correct |
| 27 |
Correct |
10 ms |
6380 KB |
Output is correct |
| 28 |
Correct |
10 ms |
6380 KB |
Output is correct |
| 29 |
Correct |
10 ms |
6380 KB |
Output is correct |
| 30 |
Correct |
9 ms |
6380 KB |
Output is correct |
| 31 |
Correct |
10 ms |
6380 KB |
Output is correct |
| 32 |
Correct |
9 ms |
6380 KB |
Output is correct |
| 33 |
Correct |
17 ms |
6380 KB |
Output is correct |
| 34 |
Correct |
14 ms |
6380 KB |
Output is correct |
| 35 |
Correct |
80 ms |
6380 KB |
Output is correct |
| 36 |
Correct |
14 ms |
6380 KB |
Output is correct |
| 37 |
Correct |
15 ms |
6380 KB |
Output is correct |
| 38 |
Correct |
90 ms |
6380 KB |
Output is correct |
| 39 |
Correct |
18 ms |
6380 KB |
Output is correct |
| 40 |
Correct |
19 ms |
6380 KB |
Output is correct |
| 41 |
Correct |
130 ms |
6380 KB |
Output is correct |
| 42 |
Correct |
17 ms |
6380 KB |
Output is correct |
| 43 |
Correct |
17 ms |
6380 KB |
Output is correct |
| 44 |
Correct |
147 ms |
6380 KB |
Output is correct |
| 45 |
Correct |
20 ms |
6380 KB |
Output is correct |
| 46 |
Correct |
19 ms |
6380 KB |
Output is correct |
| 47 |
Correct |
155 ms |
6380 KB |
Output is correct |
| 48 |
Correct |
25 ms |
6380 KB |
Output is correct |
| 49 |
Correct |
28 ms |
6380 KB |
Output is correct |
| 50 |
Correct |
214 ms |
6380 KB |
Output is correct |
| 51 |
Correct |
30 ms |
6380 KB |
Output is correct |
| 52 |
Correct |
23 ms |
6380 KB |
Output is correct |
| 53 |
Correct |
286 ms |
6380 KB |
Output is correct |
| 54 |
Correct |
33 ms |
6380 KB |
Output is correct |
| 55 |
Correct |
29 ms |
6380 KB |
Output is correct |
| 56 |
Correct |
326 ms |
6380 KB |
Output is correct |
| 57 |
Correct |
30 ms |
6380 KB |
Output is correct |
| 58 |
Correct |
37 ms |
6380 KB |
Output is correct |
| 59 |
Correct |
381 ms |
6380 KB |
Output is correct |
| 60 |
Correct |
35 ms |
6380 KB |
Output is correct |
| 61 |
Correct |
38 ms |
6380 KB |
Output is correct |
| 62 |
Correct |
476 ms |
6380 KB |
Output is correct |
| 63 |
Correct |
176 ms |
6380 KB |
Output is correct |
| 64 |
Correct |
409 ms |
6380 KB |
Output is correct |
| 65 |
Correct |
344 ms |
6380 KB |
Output is correct |
| 66 |
Correct |
276 ms |
6380 KB |
Output is correct |
| 67 |
Correct |
72 ms |
6424 KB |
Output is correct |
| 68 |
Correct |
129 ms |
6424 KB |
Output is correct |
| 69 |
Correct |
105 ms |
6424 KB |
Output is correct |
| 70 |
Correct |
65 ms |
6424 KB |
Output is correct |
| 71 |
Correct |
76 ms |
6424 KB |
Output is correct |
| 72 |
Incorrect |
48 ms |
6424 KB |
Output isn't correct |
| 73 |
Incorrect |
139 ms |
6524 KB |
Output isn't correct |
| 74 |
Correct |
173 ms |
6524 KB |
Output is correct |
| 75 |
Correct |
133 ms |
6524 KB |
Output is correct |
| 76 |
Correct |
150 ms |
6524 KB |
Output is correct |
| 77 |
Correct |
169 ms |
6524 KB |
Output is correct |
| 78 |
Correct |
49 ms |
6524 KB |
Output is correct |
| 79 |
Correct |
189 ms |
6524 KB |
Output is correct |
| 80 |
Correct |
159 ms |
6524 KB |
Output is correct |
| 81 |
Correct |
169 ms |
6528 KB |
Output is correct |
| 82 |
Correct |
170 ms |
6652 KB |
Output is correct |
| 83 |
Correct |
192 ms |
6652 KB |
Output is correct |
| 84 |
Correct |
204 ms |
6652 KB |
Output is correct |
| 85 |
Correct |
185 ms |
6652 KB |
Output is correct |
| 86 |
Correct |
165 ms |
6652 KB |
Output is correct |
| 87 |
Correct |
221 ms |
6652 KB |
Output is correct |
| 88 |
Correct |
224 ms |
6652 KB |
Output is correct |
| 89 |
Correct |
232 ms |
6652 KB |
Output is correct |
| 90 |
Correct |
187 ms |
6652 KB |
Output is correct |
| 91 |
Correct |
252 ms |
6652 KB |
Output is correct |
| 92 |
Correct |
175 ms |
6652 KB |
Output is correct |
