-
Notifications
You must be signed in to change notification settings - Fork 14
/
10711.cpp
59 lines (57 loc) · 1.2 KB
/
10711.cpp
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
#include <bits/stdc++.h>
using namespace std;
#define pb push_back
#define X first
#define Y second
typedef pair<int,int> pii;
char board[1005][1005];
int n,m;
int dx[8] = {1,1,1,0,0,-1,-1,-1};
int dy[8] = {1,0,-1,1,-1,1,0,-1};
bool vis[1005][1005];
int chk(int x, int y){
int cnt = 0;
for(int dir = 0; dir < 8; dir++){
if(board[x+dx[dir]][y+dy[dir]] == '.') cnt++;
}
return cnt;
}
int main(){
ios::sync_with_stdio(0);
cin.tie(0);
cin >> n >> m;
int cnt = 0;
vector<pii> sand;
for(int i = 0; i < n; i++){
cin >> board[i];
}
for(int i = 0; i < n; i++){
for(int j = 0; j < m; j++){
if(board[i][j] != '.' and chk(i,j) >= board[i][j]-'0'){
sand.pb({i,j});
vis[i][j]=1;
}
}
}
int ans = 0;
while(!sand.empty()){
ans++;
vector<pii> sand2;
for(auto s : sand){
board[s.X][s.Y] = '.';
}
for(auto s : sand){
int x = s.X, y = s.Y;
for(int dir = 0; dir < 8; dir++){
int nx = x+dx[dir];
int ny = y+dy[dir];
if(!vis[nx][ny] and board[nx][ny] != '.' and chk(nx,ny) >= board[nx][ny]-'0'){
sand2.pb({nx,ny});
vis[nx][ny] = 1;
}
}
}
sand = sand2;
}
cout << ans;
}