| # |
Submission time |
Handle |
Problem |
Language |
Result |
Execution time |
Memory |
| 138754 |
2019-07-30T09:49:45 Z |
Boxworld |
Mecho (IOI09_mecho) |
C++14 |
|
229 ms |
9340 KB |
#include <bits/stdc++.h>
using namespace std;
const int N=1010;
typedef pair<int,int> pii;
char G[N][N];
int dx[4]={1,-1,0,0},dy[4]={0,0,1,-1};
int T[N][N],d[N][N],vis[N][N];
int n,s,sx,sy;
int bfs(int time){
if (time*s>=T[sx][sy])return 0;
memset(vis,0,sizeof(vis));
queue<pii> Q;
vis[sx][sy]=1;
Q.push(make_pair(sx*N+sy,time*s));
while(!Q.empty()){
int dis=Q.front().second;
int x=Q.front().first/N;
int y=Q.front().first%N;
Q.pop();
if (G[x][y]=='D')return 1;
for (int k=0;k<4;k++){
int X=x+dx[k],Y=y+dy[k];
if (X<1||X>N||Y<1||Y>N)continue;
if (G[X][Y]=='T')continue;
if (dis+1>=T[X][Y]||vis[X][Y])continue;
vis[X][Y]=1;
Q.push(make_pair(X*N+Y,dis+1));
}
}
return 0;
}
int main(){
scanf("%d%d",&n,&s);
for (int i=1;i<=n;i++)scanf("%s",G[i]+1);
memset(T,-1,sizeof(T));
queue<int> bq;
for (int i=1;i<=n;i++)
for (int j=1;j<=n;j++){
if (G[i][j]=='M')sx=i,sy=j;
if (G[i][j]=='D')T[i][j]=n*n*s;
if (G[i][j]=='H'){
T[i][j]=0;
bq.push(i*N+j);
}
}
while(!bq.empty()){
int x=bq.front()/N,y=bq.front()%N;
bq.pop();
for (int i=0;i<4;i++){
int X=x+dx[i],Y=y+dy[i];
if (x<1||x>n||y<1||y>n||T[X][Y]!=-1)continue;
if (G[X][Y]=='T'||G[X][Y]=='D')continue;
T[X][Y]=T[x][y]+s;
bq.push(X*N+Y);
}
}
int l=-1,r=n*n*2;
while(l+1<r){
int m=(l+r)/2;
if (bfs(m))l=m;
else r=m;
}
printf("%d\n",l);
}
Compilation message
mecho.cpp: In function 'int main()':
mecho.cpp:34:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
scanf("%d%d",&n,&s);
~~~~~^~~~~~~~~~~~~~
mecho.cpp:35:29: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
for (int i=1;i<=n;i++)scanf("%s",G[i]+1);
~~~~~^~~~~~~~~~~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
9 ms |
8312 KB |
Output is correct |
| 2 |
Correct |
9 ms |
8312 KB |
Output is correct |
| 3 |
Correct |
9 ms |
8312 KB |
Output is correct |
| 4 |
Correct |
9 ms |
8312 KB |
Output is correct |
| 5 |
Correct |
9 ms |
8312 KB |
Output is correct |
| 6 |
Correct |
9 ms |
8312 KB |
Output is correct |
| 7 |
Correct |
115 ms |
9336 KB |
Output is correct |
| 8 |
Correct |
9 ms |
8312 KB |
Output is correct |
| 9 |
Correct |
9 ms |
8312 KB |
Output is correct |
| 10 |
Correct |
9 ms |
8312 KB |
Output is correct |
| 11 |
Incorrect |
9 ms |
8312 KB |
Output isn't correct |
| 12 |
Correct |
9 ms |
8312 KB |
Output is correct |
| 13 |
Correct |
10 ms |
8312 KB |
Output is correct |
| 14 |
Correct |
10 ms |
8312 KB |
Output is correct |
| 15 |
Correct |
10 ms |
8312 KB |
Output is correct |
| 16 |
Correct |
10 ms |
8416 KB |
Output is correct |
| 17 |
Correct |
12 ms |
8312 KB |
Output is correct |
| 18 |
Correct |
12 ms |
8312 KB |
Output is correct |
| 19 |
Correct |
12 ms |
8312 KB |
Output is correct |
| 20 |
Correct |
9 ms |
8312 KB |
Output is correct |
| 21 |
Correct |
11 ms |
8436 KB |
Output is correct |
| 22 |
Correct |
12 ms |
8312 KB |
Output is correct |
| 23 |
Correct |
10 ms |
8316 KB |
Output is correct |
| 24 |
Correct |
11 ms |
8440 KB |
Output is correct |
| 25 |
Correct |
11 ms |
8312 KB |
Output is correct |
| 26 |
Correct |
11 ms |
8440 KB |
Output is correct |
| 27 |
Correct |
10 ms |
8312 KB |
Output is correct |
| 28 |
Correct |
11 ms |
8440 KB |
Output is correct |
| 29 |
Correct |
11 ms |
8440 KB |
Output is correct |
| 30 |
Correct |
11 ms |
8440 KB |
Output is correct |
| 31 |
Correct |
12 ms |
8312 KB |
Output is correct |
| 32 |
Correct |
11 ms |
8440 KB |
Output is correct |
| 33 |
Correct |
13 ms |
8824 KB |
Output is correct |
| 34 |
Correct |
16 ms |
8824 KB |
Output is correct |
| 35 |
Correct |
31 ms |
8696 KB |
Output is correct |
| 36 |
Correct |
14 ms |
8824 KB |
Output is correct |
| 37 |
Correct |
15 ms |
8824 KB |
Output is correct |
| 38 |
Correct |
37 ms |
8824 KB |
Output is correct |
| 39 |
Correct |
15 ms |
8824 KB |
Output is correct |
| 40 |
Correct |
15 ms |
8952 KB |
Output is correct |
| 41 |
Correct |
46 ms |
8952 KB |
Output is correct |
| 42 |
Correct |
16 ms |
8952 KB |
Output is correct |
| 43 |
Correct |
16 ms |
8952 KB |
Output is correct |
| 44 |
Correct |
57 ms |
8952 KB |
Output is correct |
| 45 |
Correct |
17 ms |
9052 KB |
Output is correct |
| 46 |
Correct |
16 ms |
8824 KB |
Output is correct |
| 47 |
Correct |
64 ms |
8824 KB |
Output is correct |
| 48 |
Correct |
18 ms |
8952 KB |
Output is correct |
| 49 |
Correct |
18 ms |
8952 KB |
Output is correct |
| 50 |
Correct |
78 ms |
9080 KB |
Output is correct |
| 51 |
Correct |
19 ms |
8952 KB |
Output is correct |
| 52 |
Correct |
19 ms |
8956 KB |
Output is correct |
| 53 |
Correct |
107 ms |
9004 KB |
Output is correct |
| 54 |
Correct |
20 ms |
9080 KB |
Output is correct |
| 55 |
Correct |
20 ms |
8952 KB |
Output is correct |
| 56 |
Correct |
113 ms |
9080 KB |
Output is correct |
| 57 |
Correct |
22 ms |
8980 KB |
Output is correct |
| 58 |
Correct |
22 ms |
9080 KB |
Output is correct |
| 59 |
Correct |
136 ms |
9104 KB |
Output is correct |
| 60 |
Correct |
22 ms |
9052 KB |
Output is correct |
| 61 |
Correct |
23 ms |
9080 KB |
Output is correct |
| 62 |
Correct |
152 ms |
9180 KB |
Output is correct |
| 63 |
Correct |
115 ms |
9080 KB |
Output is correct |
| 64 |
Correct |
229 ms |
9080 KB |
Output is correct |
| 65 |
Correct |
182 ms |
9080 KB |
Output is correct |
| 66 |
Correct |
166 ms |
9080 KB |
Output is correct |
| 67 |
Correct |
139 ms |
9236 KB |
Output is correct |
| 68 |
Correct |
65 ms |
9208 KB |
Output is correct |
| 69 |
Correct |
63 ms |
9080 KB |
Output is correct |
| 70 |
Correct |
44 ms |
9080 KB |
Output is correct |
| 71 |
Correct |
55 ms |
9080 KB |
Output is correct |
| 72 |
Correct |
42 ms |
9080 KB |
Output is correct |
| 73 |
Correct |
39 ms |
9208 KB |
Output is correct |
| 74 |
Correct |
66 ms |
9208 KB |
Output is correct |
| 75 |
Correct |
85 ms |
9208 KB |
Output is correct |
| 76 |
Correct |
71 ms |
9336 KB |
Output is correct |
| 77 |
Correct |
73 ms |
9208 KB |
Output is correct |
| 78 |
Correct |
93 ms |
9336 KB |
Output is correct |
| 79 |
Correct |
56 ms |
9208 KB |
Output is correct |
| 80 |
Correct |
77 ms |
9208 KB |
Output is correct |
| 81 |
Correct |
81 ms |
9208 KB |
Output is correct |
| 82 |
Correct |
72 ms |
9208 KB |
Output is correct |
| 83 |
Correct |
104 ms |
9260 KB |
Output is correct |
| 84 |
Correct |
81 ms |
9208 KB |
Output is correct |
| 85 |
Correct |
93 ms |
9208 KB |
Output is correct |
| 86 |
Correct |
87 ms |
9292 KB |
Output is correct |
| 87 |
Correct |
88 ms |
9208 KB |
Output is correct |
| 88 |
Correct |
122 ms |
9212 KB |
Output is correct |
| 89 |
Correct |
104 ms |
9336 KB |
Output is correct |
| 90 |
Correct |
99 ms |
9208 KB |
Output is correct |
| 91 |
Correct |
126 ms |
9228 KB |
Output is correct |
| 92 |
Correct |
105 ms |
9340 KB |
Output is correct |
