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Submission #889344

# Submission time Handle Problem Language Result Execution time Memory
889344 2023-12-19T11:32:42 Z alexander707070 Dango Maker (JOI18_dango_maker) C++14
33 / 100
 51 ms 262144 KB 
#include<bits/stdc++.h>
#define MAXN 9000007
using namespace std;

struct edge{
    int to,flow,cap,rev;
};

int n,m;
char t[3007][3007];

vector<edge> v[MAXN];
int s[MAXN],cnt1,cnt2,ans;
int num[3007][3007],num2[3007][3007],total;

int flow,maxflow,source,sink;
int li[MAXN],tim,dist[MAXN],ind[MAXN];
queue<int> q;

void add_edge(int from,int to){
    v[from].push_back({to,0,1,int(v[to].size())});
    v[to].push_back({from,0,0,int(v[from].size())-1});
}

void bfs(int x){
    for(int i=0;i<v[x].size();i++){
        if(li[v[x][i].to]==tim or v[x][i].cap-v[x][i].flow<=0)continue;

        q.push(v[x][i].to);
        li[v[x][i].to]=tim;
        dist[v[x][i].to]=dist[x]+1;
    }
}

void do_bfs(){
    tim++; li[source]=tim;
    q.push(source);

    while(!q.empty()){
        bfs(q.front());
        q.pop();
    }
}

int dfs(int x,int mins){
    if(x==sink)return mins;

    if(li[x]!=tim)ind[x]=0;
    li[x]=tim;

    for(int i=ind[x];i<v[x].size();i++){
        if(dist[v[x][i].to]!=dist[x]+1 or v[x][i].cap-v[x][i].flow<=0)continue;
        int curr=dfs(v[x][i].to,1);

        if(curr>0){
            v[x][i].flow+=curr;
            v[v[x][i].to][v[x][i].rev].flow-=curr;
            return curr;
        }

        ind[x]++;
        i=max(i,ind[x]-1);
    }

    return 0;
}

int main(){

    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);

    cin>>n>>m;

    for(int i=0;i<=n+1;i++){
        for(int f=0;f<=m+1;f++){
            t[i][f]='#';
        }
    }

    for(int i=1;i<=n;i++){
        for(int f=1;f<=m;f++){
            cin>>t[i][f];
        }
    }

    source=0; sink=n*m;
    
    total=0;
    for(int i=1;i<=n;i++){
        for(int f=1;f<=m;f++){

            if(t[i][f]=='R' and t[i][f+1]=='G' and t[i][f+2]=='W'){
                total++; num[i][f]=total;
                add_edge(source,total);
            }
            if(t[i][f]=='R' and t[i+1][f]=='G' and t[i+2][f]=='W'){
                total++; num2[i][f]=total;
                add_edge(total,sink);
            }

            if(t[i][f]=='R' and t[i][f+1]=='G' and t[i][f+2]=='W' and t[i+1][f]=='G' and t[i+2][f]=='W'){
                add_edge(num[i][f],num2[i][f]);
            }
        }
    }
    
    if(total>=sink)return 0;

    for(int i=1;i<=n;i++){
        for(int f=1;f<=m;f++){
            if(t[i][f]=='G' and t[i][f-1]=='R' and t[i][f+1]=='W' and t[i-1][f]=='R' and t[i+1][f]=='W'){
                add_edge(num[i][f-1],num2[i-1][f]);
            }
        }
    }

    for(int i=2;i<=n;i++){
        for(int f=2;f<=m;f++){
            if(t[i][f]=='W' and t[i][f-2]=='R' and t[i][f-1]=='G' and t[i-2][f]=='R' and t[i-1][f]=='G'){
                add_edge(num[i][f-2],num2[i-2][f]);
            }
        }
    }

    while(true){
        do_bfs();
        if(li[sink]!=tim)break;
        tim++;
        while(true){
            flow=dfs(source,1);
            if(flow==0)break;
            maxflow+=flow;
        }
    }

    cout<<total-maxflow<<"\n";

    return 0;
}

Compilation message

dango_maker.cpp: In function 'void bfs(int)':
dango_maker.cpp:26:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<edge>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   26 |     for(int i=0;i<v[x].size();i++){
      |                 ~^~~~~~~~~~~~
dango_maker.cpp: In function 'int dfs(int, int)':
dango_maker.cpp:51:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<edge>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   51 |     for(int i=ind[x];i<v[x].size();i++){
      |                      ~^~~~~~~~~~~~

Subtask #1
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 48 ms 215900 KB Output is correct
2 Correct 45 ms 215784 KB Output is correct
3 Correct 47 ms 215888 KB Output is correct
4 Correct 45 ms 215900 KB Output is correct
5 Correct 47 ms 215892 KB Output is correct
6 Correct 46 ms 217944 KB Output is correct
7 Correct 46 ms 217936 KB Output is correct
8 Correct 45 ms 217964 KB Output is correct
9 Correct 47 ms 217824 KB Output is correct
10 Correct 45 ms 215896 KB Output is correct
11 Correct 45 ms 217936 KB Output is correct
12 Correct 50 ms 217828 KB Output is correct
13 Correct 46 ms 217944 KB Output is correct
14 Correct 48 ms 215860 KB Output is correct
15 Correct 45 ms 215888 KB Output is correct
16 Correct 45 ms 215844 KB Output is correct

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 48 ms 215900 KB Output is correct
2 Correct 45 ms 215784 KB Output is correct
3 Correct 47 ms 215888 KB Output is correct
4 Correct 45 ms 215900 KB Output is correct
5 Correct 47 ms 215892 KB Output is correct
6 Correct 46 ms 217944 KB Output is correct
7 Correct 46 ms 217936 KB Output is correct
8 Correct 45 ms 217964 KB Output is correct
9 Correct 47 ms 217824 KB Output is correct
10 Correct 45 ms 215896 KB Output is correct
11 Correct 45 ms 217936 KB Output is correct
12 Correct 50 ms 217828 KB Output is correct
13 Correct 46 ms 217944 KB Output is correct
14 Correct 48 ms 215860 KB Output is correct
15 Correct 45 ms 215888 KB Output is correct
16 Correct 45 ms 215844 KB Output is correct
17 Correct 45 ms 217948 KB Output is correct
18 Correct 45 ms 217964 KB Output is correct
19 Correct 45 ms 217940 KB Output is correct
20 Correct 48 ms 217988 KB Output is correct
21 Correct 45 ms 217936 KB Output is correct
22 Correct 46 ms 217968 KB Output is correct
23 Correct 45 ms 217988 KB Output is correct
24 Correct 45 ms 217800 KB Output is correct
25 Correct 45 ms 215728 KB Output is correct
26 Correct 45 ms 215888 KB Output is correct
27 Correct 45 ms 217936 KB Output is correct
28 Correct 46 ms 217880 KB Output is correct
29 Correct 46 ms 217936 KB Output is correct
30 Correct 51 ms 215892 KB Output is correct
31 Correct 49 ms 215892 KB Output is correct
32 Correct 45 ms 215892 KB Output is correct
33 Correct 45 ms 217980 KB Output is correct
34 Correct 45 ms 217936 KB Output is correct
35 Correct 45 ms 217936 KB Output is correct
36 Correct 46 ms 217940 KB Output is correct
37 Correct 46 ms 217940 KB Output is correct
38 Correct 45 ms 217948 KB Output is correct
39 Correct 46 ms 217948 KB Output is correct
40 Correct 45 ms 217940 KB Output is correct
41 Correct 45 ms 217948 KB Output is correct
42 Correct 45 ms 217940 KB Output is correct
43 Correct 47 ms 217940 KB Output is correct
44 Correct 50 ms 217972 KB Output is correct
45 Correct 46 ms 217936 KB Output is correct
46 Correct 46 ms 217940 KB Output is correct
47 Correct 45 ms 217948 KB Output is correct
48 Correct 46 ms 217976 KB Output is correct
49 Correct 45 ms 217972 KB Output is correct
50 Correct 45 ms 217936 KB Output is correct
51 Correct 45 ms 217948 KB Output is correct
52 Correct 47 ms 217936 KB Output is correct
53 Correct 45 ms 217936 KB Output is correct

Subtask #3
0 / 67.0

# Verdict Execution time Memory Grader output
1 Correct 48 ms 215900 KB Output is correct
2 Correct 45 ms 215784 KB Output is correct
3 Correct 47 ms 215888 KB Output is correct
4 Correct 45 ms 215900 KB Output is correct
5 Correct 47 ms 215892 KB Output is correct
6 Correct 46 ms 217944 KB Output is correct
7 Correct 46 ms 217936 KB Output is correct
8 Correct 45 ms 217964 KB Output is correct
9 Correct 47 ms 217824 KB Output is correct
10 Correct 45 ms 215896 KB Output is correct
11 Correct 45 ms 217936 KB Output is correct
12 Correct 50 ms 217828 KB Output is correct
13 Correct 46 ms 217944 KB Output is correct
14 Correct 48 ms 215860 KB Output is correct
15 Correct 45 ms 215888 KB Output is correct
16 Correct 45 ms 215844 KB Output is correct
17 Correct 45 ms 217948 KB Output is correct
18 Correct 45 ms 217964 KB Output is correct
19 Correct 45 ms 217940 KB Output is correct
20 Correct 48 ms 217988 KB Output is correct
21 Correct 45 ms 217936 KB Output is correct
22 Correct 46 ms 217968 KB Output is correct
23 Correct 45 ms 217988 KB Output is correct
24 Correct 45 ms 217800 KB Output is correct
25 Correct 45 ms 215728 KB Output is correct
26 Correct 45 ms 215888 KB Output is correct
27 Correct 45 ms 217936 KB Output is correct
28 Correct 46 ms 217880 KB Output is correct
29 Correct 46 ms 217936 KB Output is correct
30 Correct 51 ms 215892 KB Output is correct
31 Correct 49 ms 215892 KB Output is correct
32 Correct 45 ms 215892 KB Output is correct
33 Correct 45 ms 217980 KB Output is correct
34 Correct 45 ms 217936 KB Output is correct
35 Correct 45 ms 217936 KB Output is correct
36 Correct 46 ms 217940 KB Output is correct
37 Correct 46 ms 217940 KB Output is correct
38 Correct 45 ms 217948 KB Output is correct
39 Correct 46 ms 217948 KB Output is correct
40 Correct 45 ms 217940 KB Output is correct
41 Correct 45 ms 217948 KB Output is correct
42 Correct 45 ms 217940 KB Output is correct
43 Correct 47 ms 217940 KB Output is correct
44 Correct 50 ms 217972 KB Output is correct
45 Correct 46 ms 217936 KB Output is correct
46 Correct 46 ms 217940 KB Output is correct
47 Correct 45 ms 217948 KB Output is correct
48 Correct 46 ms 217976 KB Output is correct
49 Correct 45 ms 217972 KB Output is correct
50 Correct 45 ms 217936 KB Output is correct
51 Correct 45 ms 217948 KB Output is correct
52 Correct 47 ms 217936 KB Output is correct
53 Correct 45 ms 217936 KB Output is correct
54 Correct 45 ms 217948 KB Output is correct
55 Correct 50 ms 257620 KB Output is correct
56 Correct 47 ms 218196 KB Output is correct
57 Runtime error 39 ms 262144 KB Execution killed with signal 9
58 Halted 0 ms 0 KB -