QOJ.ac

QOJ

ID题目提交者结果用时内存语言文件大小提交时间测评时间
#429618#8507. Clever Cell ChoicessnpmrnhlolAC ✓5594ms48724kbC++144.7kb2024-06-02 18:19:112024-06-02 18:19:13

Judging History

你现在查看的是最新测评结果

  • [2024-06-02 18:19:13]
  • 评测
  • 测评结果:AC
  • 用时:5594ms
  • 内存:48724kb
  • [2024-06-02 18:19:11]
  • 提交

answer

#include<iostream>
#include<vector>
#include<queue>
using namespace std;
typedef long long ll;
const int inf = 1e9;
const int N = 50;
const int L = N*N + 2;
queue <int> q;
struct Dinic{
    int cap[L][L];
    int flow[L][L];
    vector <int> edges[L];
    int dist[L];
    int ptr[L];
    int n;
    int s,t;
    void init(int sz){
        for(int i = 0;i < n;i++){
            for(int j = 0;j < n;j++){
                cap[i][j] = flow[i][j] = 0;
            }
            edges[i].clear();
        }
        n = sz;
    }
    void addedge(int u,int w,int c){
        //cout<<u<<' '<<w<<' '<<c<<'\n';
        cap[u][w]+=c;
        edges[u].push_back(w);
        edges[w].push_back(u);
    }
    void bfs(){
        for(int i = 0;i < n;i++){
            dist[i] = -1;
        }
        q.push(s);
        dist[s] = 0;
        while(!q.empty()){
            int x = q.front();
            q.pop();
            for(auto i:edges[x]){
                if(flow[x][i] == cap[x][i] || dist[i] != -1)continue;
                q.push(i);
                dist[i] = dist[x] + 1;
            }
        }
    }
    int dfs(int node,int nr){
        if(node == t){
            return nr;
        }
        while(ptr[node] < (int)edges[node].size()){
            int id = edges[node][ptr[node]];
            ptr[node]++;
            if(dist[id] == dist[node] + 1 && flow[node][id] != cap[node][id]){
                ///can push into here
                int x = dfs(id,min(cap[node][id] - flow[node][id],nr));
                if(x == 0)continue;
                flow[node][id]+=x;
                flow[id][node]-=x;
                return x;
            }
        }
        return 0;
    }
    int maxflow(int st,int en){
        s = st;
        t = en;
        int r = 0;
        while(1){
            bfs();
            if(dist[t] == -1)break;
            for(int i = 0;i < n;i++)ptr[i] = 0;
            while(1){
                int x = dfs(s,inf);
                r+=x;
                if(x == 0)break;
            }
        }
        for(int i = 0;i < n;i++){
            for(auto j:edges[i]){
                flow[i][j] = 0;
            }
        }
        return r;
    }
};
Dinic flow;
int d[4][2] = {{1,0},{-1,0},{0,1},{0,-1}};
int n,m;
char v[N][N];
int vis[N][N];
int id[N][N];
vector <pair<int,int>> e;
vector <int> source;
vector <int> sink;
int sz = 0;
bool inbound(int x,int y){
    return 0 <= x && x < n && 0 <= y && y < m;
}
void dfs(int x,int y){
    vis[x][y] = 1;
    id[x][y] = sz++;
    if((x + y)%2 == 0){
        source.push_back(id[x][y]);
    }else{
        sink.push_back(id[x][y]);
    }
    for(int i = 0;i < 4;i++){
        int nx = x + d[i][0];
        int ny = y + d[i][1];
        if(inbound(nx,ny) && v[nx][ny] == '.'){
            if(!vis[nx][ny]){
                dfs(nx,ny);
            }
            if(id[x][y] < id[nx][ny]){
                if((x + y)%2 == 0){
                    e.push_back({id[x][y],id[nx][ny]});
                }else{
                    e.push_back({id[nx][ny],id[x][y]});
                }
            }
        }
    }
}
int gb = -1;
int ans = 0;
void dfs2(int x,int y){
    int nr = id[x][y];
    if((x + y)%2 == 0){
        flow.cap[0][nr + 1]--;
    }else{
        flow.cap[nr + 1][sz + 1]--;
    }
    if(flow.maxflow(0,sz + 1) == gb){
        ans++;
    }
    if((x + y)%2 == 0){
        flow.cap[0][nr + 1]++;
    }else{
        flow.cap[nr + 1][sz + 1]++;
    }
    vis[x][y] = 2;
    for(int i = 0;i < 4;i++){
        int nx = x + d[i][0];
        int ny = y + d[i][1];
        if(inbound(nx,ny) && v[nx][ny] == '.'){
            if(vis[nx][ny] == 1){
                dfs2(nx,ny);
            }
        }
    }
}
int main(){
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cin>>n>>m;
    int cnt = 0;
    for(int i = 0;i < n;i++){
        for(int j = 0;j < m;j++){
            cin>>v[i][j];
            if(v[i][j] == '#')cnt++;
        }
    }
    for(int i = 0;i < n;i++){
        for(int j = 0;j < m;j++){
            if(v[i][j] == '.' && vis[i][j] == 0){
                sz = 0;
                e.clear();
                source.clear();
                sink.clear();
                dfs(i, j);
                flow.init(sz + 2);
                for(auto i:source){
                    flow.addedge(0,i + 1,1);
                }
                for(auto i:sink){
                    flow.addedge(i + 1,sz + 1,1);
                }
                for(auto i:e){
                    flow.addedge(i.first + 1,i.second + 1,1);
                }
                gb = flow.maxflow(0,sz + 1);
                dfs2(i, j);
            }
        }
    }
    cout<<ans;
    return 0;
}

详细

Test #1:

score: 100
Accepted
time: 1ms
memory: 3904kb

input:

3 3
#.#
...
#.#

output:

4

result:

ok 1 number(s): "4"

Test #2:

score: 0
Accepted
time: 0ms
memory: 5944kb

input:

3 3
..#
...
...

output:

0

result:

ok 1 number(s): "0"

Test #3:

score: 0
Accepted
time: 0ms
memory: 3608kb

input:

1 4
...#

output:

2

result:

ok 1 number(s): "2"

Test #4:

score: 0
Accepted
time: 0ms
memory: 3952kb

input:

1 5
####.

output:

1

result:

ok 1 number(s): "1"

Test #5:

score: 0
Accepted
time: 0ms
memory: 3716kb

input:

1 6
#..###

output:

0

result:

ok 1 number(s): "0"

Test #6:

score: 0
Accepted
time: 0ms
memory: 3728kb

input:

2 5
....#
###.#

output:

3

result:

ok 1 number(s): "3"

Test #7:

score: 0
Accepted
time: 0ms
memory: 3696kb

input:

2 6
...##.
.#.###

output:

4

result:

ok 1 number(s): "4"

Test #8:

score: 0
Accepted
time: 1ms
memory: 3764kb

input:

5 5
##...
##.#.
##.##
##.#.
.##..

output:

7

result:

ok 1 number(s): "7"

Test #9:

score: 0
Accepted
time: 1ms
memory: 3904kb

input:

6 6
...##.
#..#..
......
..#...
#...##
.#....

output:

1

result:

ok 1 number(s): "1"

Test #10:

score: 0
Accepted
time: 1ms
memory: 4096kb

input:

10 10
####.#...#
.#.###....
#....#..#.
.....#.#..
##.#..#.#.
..#..##...
.##.#####.
#######.##
.#.#.##..#
.#.###.##.

output:

26

result:

ok 1 number(s): "26"

Test #11:

score: 0
Accepted
time: 1ms
memory: 3940kb

input:

10 10
..#..#.###
.#######.#
.#.####.#.
......####
#..#..#.#.
...#.###.#
#.#...#.#.
.#...#....
...#.#.#.#
...###....

output:

21

result:

ok 1 number(s): "21"

Test #12:

score: 0
Accepted
time: 0ms
memory: 5912kb

input:

15 15
#......#.#.###.
#.##...####..#.
##.....##.##.#.
#.###.#..#...##
....###.##.#.#.
.#..#.###.##.#.
######.#.####.#
.#....#..####..
.....#.###.##..
#..##.###.#####
#.##.#####..###
.#######..##.#.
##....#.##...#.
....#####.##.##
...#.#........#

output:

51

result:

ok 1 number(s): "51"

Test #13:

score: 0
Accepted
time: 1ms
memory: 6380kb

input:

15 15
###.#......#...
#.....#.#.###.#
#..#.#.###..#..
.#####.##.#..#.
...#.##.#..#.#.
#.#.###.....###
......#..##....
..##..#.#.#...#
..#..#..#......
....####...#..#
.####..#.#.##.#
###.#..#.#.#...
.#.##.##....##.
.#.#####.#..#.#
#.#.#.##.#.....

output:

61

result:

ok 1 number(s): "61"

Test #14:

score: 0
Accepted
time: 1ms
memory: 5944kb

input:

20 20
####....##.#####.##.
...####.##..#.####..
#.#.....#....##..###
###..###.#.#..#..###
##.##..#.##.####....
#...###.##.###.##...
.###...#####.##....#
#...###...##........
##.#.#.#.###.......#
#...##.##.#..##.##..
..##.##.######....##
#.#....#.##.##.##..#
##.....#..#.########
##....##.###...#....
...

output:

95

result:

ok 1 number(s): "95"

Test #15:

score: 0
Accepted
time: 1ms
memory: 6076kb

input:

20 20
.##.#.#.#..##..##.#.
..#.##.##.....##..##
.#....##...####..#..
##..###..#.#..##....
....#.##.##.###...##
.#.#.##.#..###....#.
######.#..#....#.#..
.##.###..##..##.###.
#.....#.#..#.##.#.#.
###.#####.##..#.##.#
...###.####.##...#.#
.#.....#.#.#.#..###.
#.#...#####..##.####
..####.##..##.#.#.##
...

output:

109

result:

ok 1 number(s): "109"

Test #16:

score: 0
Accepted
time: 0ms
memory: 6156kb

input:

30 30
###...###....#..#.#.#######...
.##..#.###.#.####.#...#..#.#..
.##..#######..##...#....##...#
..###..#..###...#.##.....#..##
#.#.#.#.#...###.######..#....#
###..##..###.#.###.#.####..#..
.....#...####..####..##.#.##.#
..#...######.##....#..###..###
..#####......#.#...##...#..##.
##..#.#.#.##......

output:

196

result:

ok 1 number(s): "196"

Test #17:

score: 0
Accepted
time: 2ms
memory: 6324kb

input:

30 30
######....###.#..#..###.#.##.#
.#..#...#.##..#.##...#...#####
##.#.##..##.#..###.#.#...####.
.####.###..##..#..#.#####..#.#
....##.##...#...##.####..####.
..###.##.##...##.##.###.####.#
#####......#.#...#..........#.
..#.....###..##.##..##.#.#####
..##...#.##.#.#.#..#.#.#.##...
...#.#.##..###....

output:

196

result:

ok 1 number(s): "196"

Test #18:

score: 0
Accepted
time: 3ms
memory: 4576kb

input:

40 40
......##...#.##..###.##.#.....#.#.#..#.#
#..###...####.####..###.#.#.#..#.##..##.
############.#.#...##..#...#........#.##
##.###.##########...###...####.##..#####
.###.#.##.##....##...#.##.#..#..##.#..#.
##...####.##.###.#.#.##...##..####.#####
#####..##.###.##.#.#.....####..##...##..
.#..###...

output:

290

result:

ok 1 number(s): "290"

Test #19:

score: 0
Accepted
time: 4ms
memory: 6932kb

input:

40 40
.####.####.....##.......#....########..#
.#.#....#####..#.##.###..#..#.#...##.#.#
.##.####..#.#...#.######..#.....##.#.##.
.##..##...#...#.#.#..#.###.....#..##.##.
..###.#.#....#######...#.##.##...##...#.
.##..#......##.##########.##.###..#..#.#
###.##.#.##...#.#####...###..##.#.#..###
#.###.....

output:

307

result:

ok 1 number(s): "307"

Test #20:

score: 0
Accepted
time: 4ms
memory: 4588kb

input:

50 50
#..#..###.###.####..#..#.##.#.##...#.#...########.
..#.##.##..##..##.##.##.##...#.#.####.#.##...##..#
....##.#.#..#.#.#.###...##.###.#...#.##..#..#..###
#.###.#.##.#......##...#..#..#..##..#####.##.#....
.##.####..##.#..#...##...#..#...##..##.##..#.##...
.###.#..#..####....##...#......##..#.##...

output:

488

result:

ok 1 number(s): "488"

Test #21:

score: 0
Accepted
time: 9ms
memory: 6920kb

input:

50 50
...##..#.#.##...#..##........##..###..##..#......#
.......#.#..#####.##.##.##.###.#.##.#.#..##......#
...##.##.########.##...#...#...#####...###.####.#.
#....###..###.###......##.#####..##.#...#.#...###.
#.##.##...#.#....##..##.##..##.#..####..#####.##..
.##.##.#.##...#.##.#.#....##..#..#.##.#...

output:

494

result:

ok 1 number(s): "494"

Test #22:

score: 0
Accepted
time: 0ms
memory: 6060kb

input:

1 10
.#........

output:

1

result:

ok 1 number(s): "1"

Test #23:

score: 0
Accepted
time: 1ms
memory: 5820kb

input:

1 11
#..........

output:

0

result:

ok 1 number(s): "0"

Test #24:

score: 0
Accepted
time: 0ms
memory: 3740kb

input:

1 21
#.......#............

output:

4

result:

ok 1 number(s): "4"

Test #25:

score: 0
Accepted
time: 1ms
memory: 3824kb

input:

2 12
..#.........
......#.....

output:

0

result:

ok 1 number(s): "0"

Test #26:

score: 0
Accepted
time: 1ms
memory: 5976kb

input:

2 22
....#.................
..........#......#..#.

output:

0

result:

ok 1 number(s): "0"

Test #27:

score: 0
Accepted
time: 1ms
memory: 4424kb

input:

33 3
#..
...
...
...
.#.
...
...
...
...
.#.
...
...
...
...
..#
...
...
...
...
...
...
..#
..#
...
...
...
...
...
...
...
.#.
...
.#.

output:

3

result:

ok 1 number(s): "3"

Test #28:

score: 0
Accepted
time: 1ms
memory: 4080kb

input:

42 1
.
.
.
.
.
.
#
.
.
.
.
.
.
.
.
#
.
.
.
.
.
#
.
.
.
.
#
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.

output:

11

result:

ok 1 number(s): "11"

Test #29:

score: 0
Accepted
time: 44ms
memory: 10720kb

input:

13 37
##........#..........................
....................#................
..........#.............#............
..............#.....#.....#..........
....#....#.....................##....
....#........#.........#.............
........#.......#....................
....#............##............

output:

221

result:

ok 1 number(s): "221"

Test #30:

score: 0
Accepted
time: 14ms
memory: 9688kb

input:

31 13
.....#......#
........#....
....#.#......
....#........
.............
.#.........#.
......#......
............#
..#.#......#.
.............
.......#.....
.....#.......
..#..........
.##.#........
.#..#........
..........##.
.............
...........##
............#
.............
.......#.#...
...

output:

184

result:

ok 1 number(s): "184"

Test #31:

score: 0
Accepted
time: 1934ms
memory: 35016kb

input:

44 44
...................#...........#............
.#............#.#..#.#......................
...#....#.........##....#...##..............
.......#....................................
.....##...#...##..........#.................
..##.#...........#.........##........#......
.....#.....................

output:

833

result:

ok 1 number(s): "833"

Test #32:

score: 0
Accepted
time: 2326ms
memory: 38700kb

input:

49 46
......##.................#....................
...#.................#.....#..#..........#.#..
#.....#...............#......##....#.....#....
..........#............##...................##
...#......#.#..............###..#..........#..
..................................#...........
...........#...

output:

956

result:

ok 1 number(s): "956"

Test #33:

score: 0
Accepted
time: 4351ms
memory: 41512kb

input:

50 50
..#..#................#.#.......#.................
#...........................#..#..................
...#..............#....#...............#..........
.........#..........#........................#....
...#....#..........#..#.#................##..#....
...#.........#.#.#..................#.....

output:

1020

result:

ok 1 number(s): "1020"

Test #34:

score: 0
Accepted
time: 0ms
memory: 3700kb

input:

1 7
.......

output:

4

result:

ok 1 number(s): "4"

Test #35:

score: 0
Accepted
time: 1ms
memory: 5808kb

input:

1 10
..........

output:

0

result:

ok 1 number(s): "0"

Test #36:

score: 0
Accepted
time: 53ms
memory: 21952kb

input:

31 35
...................................
...................................
...................................
...................................
...................................
...................................
...................................
...................................
.........

output:

543

result:

ok 1 number(s): "543"

Test #37:

score: 0
Accepted
time: 49ms
memory: 21568kb

input:

33 33
.................................
.................................
.................................
.................................
.................................
.................................
.................................
.................................
.........................

output:

545

result:

ok 1 number(s): "545"

Test #38:

score: 0
Accepted
time: 131ms
memory: 32392kb

input:

42 42
..........................................
..........................................
..........................................
..........................................
..........................................
..........................................
.......................................

output:

0

result:

ok 1 number(s): "0"

Test #39:

score: 0
Accepted
time: 229ms
memory: 40288kb

input:

47 48
................................................
................................................
................................................
................................................
................................................
................................................
...

output:

0

result:

ok 1 number(s): "0"

Test #40:

score: 0
Accepted
time: 5594ms
memory: 48724kb

input:

50 50
...##.#......#....#............#...........#......
...#........#.............#.....##...#.....#.....#
.......#..#..#.#...........#...............#......
.......#........#......#.................#......#.
#....................................#...#........
........#.................#.........#.....

output:

909

result:

ok 1 number(s): "909"

Test #41:

score: 0
Accepted
time: 1261ms
memory: 39068kb

input:

50 50
.##...###......#......#.......###.....#.#..#.#....
.#...#.####........#.##......#...##..#..#.........
..###..#....#.......#..##.......#...#.....#...#..#
##.#....#...#...#...##.#..##.#.#..#.......#...##..
##.#..#........#.#..#.##.....#..##.....##..#...#..
.............#..#....##.....#..##.....#...

output:

688

result:

ok 1 number(s): "688"

Test #42:

score: 0
Accepted
time: 5ms
memory: 6564kb

input:

50 50
#....#.####.###........##.#...#......#..##.##.##..
#####.#.#.######..##.###.....#.#.#...#.###.#.#....
.#.#####.#..##.#...#....#.##...#.##..####.#.#...##
#.#...##..##....#....######.##.####...#.##.##.####
#..###.....#.##..###...###.##...#..####....##.##.#
#....#.#...#.##...###..###....#.###..#....

output:

536

result:

ok 1 number(s): "536"

Test #43:

score: 0
Accepted
time: 0ms
memory: 4092kb

input:

50 50
#####.#####.###..###..#######.##.#.####.#.#.###.##
###.#.####.##...##.#.##.##..####.######.#..###.#..
###...####.########..###.###.###..###.#####..#####
###########..##.###..#..#####..#....##..######.#.#
#######.####.#.#####.#...######..#.#####.#.#######
####.#.##.#######..######.##.###.##.###...

output:

371

result:

ok 1 number(s): "371"

Test #44:

score: 0
Accepted
time: 1ms
memory: 3776kb

input:

50 50
..##.####.#..#.##..#.#.#####..####.########.###.##
###.###..#.##.##..########...#########..##########
#########.#######.###..####################..#####
#######.##.###.###.###.#..####.#####...###..###.#.
##.#.##############.###########.####...##########.
.....#.#.#####.#...#.##################...

output:

299

result:

ok 1 number(s): "299"

Test #45:

score: 0
Accepted
time: 1ms
memory: 3924kb

input:

50 50
############.########################.###########.
####.##########.#############.#############.######
#####.#######.###############.#############.#.##.#
..#.##.#####..###.###########.########.####.######
###############.#.########.##############.######..
######.#################.#..##.########...

output:

189

result:

ok 1 number(s): "189"

Test #46:

score: 0
Accepted
time: 2171ms
memory: 33092kb

input:

43 44
.................#....#..#...............##.
....#..#.............................#......
.............#.....................#.#......
.#.....#......#...............#.............
#...............#...#...............#.......
.#.....#..#...........#.......#.............
..#........................

output:

776

result:

ok 1 number(s): "776"

Test #47:

score: 0
Accepted
time: 93ms
memory: 14348kb

input:

15 49
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..#..#.....##...#......#....#.....#........#..#..
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output:

218

result:

ok 1 number(s): "218"

Test #48:

score: 0
Accepted
time: 0ms
memory: 5992kb

input:

5 10
#..#......
.#....##..
..###...##
..#...#..#
#....#....

output:

3

result:

ok 1 number(s): "3"

Test #49:

score: 0
Accepted
time: 355ms
memory: 28280kb

input:

49 49
#.#.##...#.....#..##..##..##....##..###....##.##.
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#####..#...#....#.######......#..#....###..#.###.
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output:

530

result:

ok 1 number(s): "530"

Test #50:

score: 0
Accepted
time: 0ms
memory: 5968kb

input:

22 22
###.#.#######.###.##.#
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output:

105

result:

ok 1 number(s): "105"

Test #51:

score: 0
Accepted
time: 1ms
memory: 4036kb

input:

13 31
.###..##.#..##.#..#.#..#.###..#
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output:

56

result:

ok 1 number(s): "56"

Test #52:

score: 0
Accepted
time: 1ms
memory: 5836kb

input:

33 33
#.###.##..####.##.##..#.##..#####
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output:

160

result:

ok 1 number(s): "160"

Test #53:

score: 0
Accepted
time: 63ms
memory: 20764kb

input:

50 50
......#.....................................######
......#.....................................#.....
......#.....................................#.....
......#.....................................#.....
......#.....................................#.....
......#...................................

output:

267

result:

ok 1 number(s): "267"

Test #54:

score: 0
Accepted
time: 1622ms
memory: 37368kb

input:

50 50
......#..#....###.....#.#......#..................
..#....#......#...................................
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output:

862

result:

ok 1 number(s): "862"

Test #55:

score: 0
Accepted
time: 457ms
memory: 19232kb

input:

50 50
...#..............#.........#.......#........#....
.........#.#.#..#...............#.#..............#
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.#.#....#..#.......#.#....#.#...........#.........
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output:

926

result:

ok 1 number(s): "926"

Test #56:

score: 0
Accepted
time: 38ms
memory: 17436kb

input:

50 50
............................................#.....
............................................#.....
............................................#.....
............................................#.....
............................................#.....
..........................................

output:

406

result:

ok 1 number(s): "406"

Test #57:

score: 0
Accepted
time: 76ms
memory: 27572kb

input:

50 50
.........#########################################
..................................................
..................................................
..................................................
###################################...............
..................................#.......

output:

664

result:

ok 1 number(s): "664"

Test #58:

score: 0
Accepted
time: 77ms
memory: 13036kb

input:

50 50
.#........................................#.#.##..
.#........#...............................#...##..
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output:

650

result:

ok 1 number(s): "650"

Test #59:

score: 0
Accepted
time: 156ms
memory: 18488kb

input:

50 50
..#...#.....#.........#...#.#....#..#...#.........
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............#....#.##........#....#.....#....#....
...##...#...###########################...

output:

939

result:

ok 1 number(s): "939"

Test #60:

score: 0
Accepted
time: 2ms
memory: 4092kb

input:

50 50
.#######..####.....##..#....#.#.##.####...#..#...#
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.#.###.##.###...##.##..#.##.#...#..#.###.######..#
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output:

429

result:

ok 1 number(s): "429"

Test #61:

score: 0
Accepted
time: 68ms
memory: 26988kb

input:

50 50
..##................................#..#.....#....
..##................................#..#.....#....
..##................................#..#.....#....
..#####.............................#..#.....#....
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output:

0

result:

ok 1 number(s): "0"

Test #62:

score: 0
Accepted
time: 31ms
memory: 14568kb

input:

50 50
.............................#......#...#...#.....
.............................#......#...#...#.....
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output:

264

result:

ok 1 number(s): "264"

Test #63:

score: 0
Accepted
time: 35ms
memory: 10576kb

input:

50 50
.........#..#....................##..#......#.....
.........#..#....................##..#......#.....
.........#..#....................##..#......#.....
.........#..#....................##..#...#..#.....
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output:

763

result:

ok 1 number(s): "763"

Test #64:

score: 0
Accepted
time: 11ms
memory: 7816kb

input:

50 50
.....#....#.###.#.....#...........................
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.....#....#.###.#.....############################
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output:

365

result:

ok 1 number(s): "365"

Test #65:

score: 0
Accepted
time: 7ms
memory: 9852kb

input:

50 50
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output:

301

result:

ok 1 number(s): "301"

Extra Test:

score: 0
Extra Test Passed