oj.uz

Submission #153547

# Submission time Handle Problem Language Result Execution time Memory
153547 2019-09-14T15:25:03 Z mhy908 Dango Maker (JOI18_dango_maker) C++14
33 / 100
 537 ms 262148 KB 
#include <bits/stdc++.h>
#define pb push_back
#define INF 987654321
using namespace std;
typedef long long LL;
int n, m, x;
vector<char> str[3010];
int ans;
short re[3010][3010];
vector<int> id;
vector<int> par;
vector<bool> used;
vector<int> dist, A, B;
vector<vector<int> > vc, link;
vector<vector<vector<int> > >col;
map<int, int> mp;
queue<int> Q;
int findpar(int num)
{
    if(num==par[num])return num;
    return par[num]=findpar(par[num]);
}
void mergepar(int a, int b)
{
    a=findpar(a);
    b=findpar(b);
    par[a]=par[b];
}
void bfs(int p)
{
    for(int i=0; i<vc[p].size(); i++){
        if(!used[i]){
            dist[i]=0;
            Q.push(i);
        }
        else dist[i]=INF;
    }
    while(!Q.empty()){
        int a=Q.front();
        Q.pop();
        for(int b: link[vc[p][a]]){
            b=mp[b];
            if(B[b]!=-1&&dist[B[b]]==INF){
                dist[B[b]]=dist[a]+1;
                Q.push(B[b]);
            }
        }
    }
}
bool dfs(int p, int a){
    for(int b: link[vc[p][a]]){
        b=mp[b];
        if(B[b]==-1||dist[B[b]]==dist[a]+1&&dfs(p, B[b])){
            used[a]=true;
            A[a]=b;
            B[b]=a;
            return true;
        }
    }
    return false;
}
int hopcroft_carp(int p)
{
    int match=0;
    while(1){
        bfs(p);
        int flow=0;
        for(int i=0; i<vc[p].size(); i++)
            if(!used[i]&&dfs(p, i))flow++;
        if(!flow)break;
        match+=flow;
    }
    return match/2;
}
int main()
{
    scanf("%d%d", &n, &m);
    for(int i=1; i<=n; i++){
        str[i].pb(0);
        for(int j=1; j<=m; j++){
            char y;
            scanf(" %c", &y);
            str[i].pb(y);
        }
    }
    col.resize(n+1);
    for(int i=1; i<=n; i++)col[i].resize(m+1);
    for(int i=1; i<=n; i++){
        for(int j=1; j<=m; j++){
            if(j+2<=m)
                if(str[i][j]=='R'&&str[i][j+1]=='G'&&str[i][j+2]=='W'){
                    ++x;
                    col[i][j].pb(x);
                    col[i][j+1].pb(x);
                    col[i][j+2].pb(x);
                }
            if(i+2<=n)
                if(str[i][j]=='R'&&str[i+1][j]=='G'&&str[i+2][j]=='W'){
                    ++x;
                    col[i][j].pb(x);
                    col[i+1][j].pb(x);
                    col[i+2][j].pb(x);
                }
        }
    }
    for(int i=1; i<=n; i++){
        str[i].clear();
        vector<char>().swap(str[i]);
    }
    link.resize(100000);
    for(int i=1; i<=x; i++)
    for(int i=0; i<=x; i++)par.pb(i);
    for(int i=1; i<=n; i++){
        for(int j=1; j<=m; j++){
            if(col[i][j].size()==2){
                mergepar(col[i][j][1], col[i][j][0]);
                link[col[i][j][1]].pb(col[i][j][0]);
                link[col[i][j][0]].pb(col[i][j][1]);
            }
        }
    }
    col.clear();
    vector<vector<vector<int> > >().swap(col);
    for(int i=1; i<=x; i++){
        id.pb(findpar(i));
    }
    sort(id.begin(), id.end());
    id.erase(unique(id.begin(), id.end()), id.end());
    int maxpar=1;
    for(int i=1; i<=x; i++){
        par[i]=lower_bound(id.begin(), id.end(), par[i])-id.begin();
        maxpar=max(maxpar, par[i]+1);
    }
    id.clear();
    vector<int>().swap(id);
    vc.resize(maxpar);
    for(int i=1; i<=x; i++){
        vc[par[i]].pb(i);
    }
    par.clear();
    vector<int>().swap(par);
    for(int i=0; i<maxpar; i++){
        if(vc[i].size()==1)ans++;
        else{
            for(int j=0; j<vc[i].size(); j++)mp[vc[i][j]]=j;
            used.resize(vc[i].size()+2);
            dist.resize(vc[i].size()+2);
            A.resize(vc[i].size()+2);
            B.resize(vc[i].size()+2);
            for(int j=0; j<A.size(); j++)A[j]=B[j]=-1;
            ans+=vc[i].size()-hopcroft_carp(i);
            mp.clear();
            dist.clear();
            A.clear();
            B.clear();
            used.clear();
            vector<int>().swap(dist);
            vector<int>().swap(A);
            vector<int>().swap(B);
            vector<bool>().swap(used);
        }
    }
    printf("%d", ans);
}

Compilation message

dango_maker.cpp: In function 'void bfs(int)':
dango_maker.cpp:31:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(int i=0; i<vc[p].size(); i++){
                  ~^~~~~~~~~~~~~
dango_maker.cpp: In function 'bool dfs(int, int)':
dango_maker.cpp:53:43: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
         if(B[b]==-1||dist[B[b]]==dist[a]+1&&dfs(p, B[b])){
dango_maker.cpp: In function 'int hopcroft_carp(int)':
dango_maker.cpp:68:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         for(int i=0; i<vc[p].size(); i++)
                      ~^~~~~~~~~~~~~
dango_maker.cpp: In function 'int main()':
dango_maker.cpp:145:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
             for(int j=0; j<vc[i].size(); j++)mp[vc[i][j]]=j;
                          ~^~~~~~~~~~~~~
dango_maker.cpp:150:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
             for(int j=0; j<A.size(); j++)A[j]=B[j]=-1;
                          ~^~~~~~~~~
dango_maker.cpp:77:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d%d", &n, &m);
     ~~~~~^~~~~~~~~~~~~~~~
dango_maker.cpp:82:18: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
             scanf(" %c", &y);
             ~~~~~^~~~~~~~~~~

Subtask #1
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 2680 KB Output is correct
2 Correct 4 ms 2808 KB Output is correct
3 Correct 4 ms 2808 KB Output is correct
4 Correct 4 ms 2680 KB Output is correct
5 Correct 6 ms 2680 KB Output is correct
6 Correct 5 ms 2808 KB Output is correct
7 Correct 4 ms 2680 KB Output is correct
8 Correct 4 ms 2808 KB Output is correct
9 Correct 4 ms 2680 KB Output is correct
10 Correct 5 ms 2808 KB Output is correct
11 Correct 4 ms 2680 KB Output is correct
12 Correct 5 ms 2808 KB Output is correct
13 Correct 4 ms 2680 KB Output is correct
14 Correct 4 ms 2680 KB Output is correct
15 Correct 4 ms 2808 KB Output is correct
16 Correct 4 ms 2680 KB Output is correct

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 2680 KB Output is correct
2 Correct 4 ms 2808 KB Output is correct
3 Correct 4 ms 2808 KB Output is correct
4 Correct 4 ms 2680 KB Output is correct
5 Correct 6 ms 2680 KB Output is correct
6 Correct 5 ms 2808 KB Output is correct
7 Correct 4 ms 2680 KB Output is correct
8 Correct 4 ms 2808 KB Output is correct
9 Correct 4 ms 2680 KB Output is correct
10 Correct 5 ms 2808 KB Output is correct
11 Correct 4 ms 2680 KB Output is correct
12 Correct 5 ms 2808 KB Output is correct
13 Correct 4 ms 2680 KB Output is correct
14 Correct 4 ms 2680 KB Output is correct
15 Correct 4 ms 2808 KB Output is correct
16 Correct 4 ms 2680 KB Output is correct
17 Correct 4 ms 2684 KB Output is correct
18 Correct 4 ms 2808 KB Output is correct
19 Correct 4 ms 2680 KB Output is correct
20 Correct 4 ms 2680 KB Output is correct
21 Correct 5 ms 2808 KB Output is correct
22 Correct 4 ms 2808 KB Output is correct
23 Correct 4 ms 2680 KB Output is correct
24 Correct 5 ms 2680 KB Output is correct
25 Correct 4 ms 2680 KB Output is correct
26 Correct 5 ms 2680 KB Output is correct
27 Correct 4 ms 2808 KB Output is correct
28 Correct 5 ms 2808 KB Output is correct
29 Correct 4 ms 2808 KB Output is correct
30 Correct 4 ms 2808 KB Output is correct
31 Correct 4 ms 2808 KB Output is correct
32 Correct 4 ms 2808 KB Output is correct
33 Correct 4 ms 2808 KB Output is correct
34 Correct 4 ms 2936 KB Output is correct
35 Correct 4 ms 2808 KB Output is correct
36 Correct 4 ms 2808 KB Output is correct
37 Correct 5 ms 2808 KB Output is correct
38 Correct 5 ms 2808 KB Output is correct
39 Correct 4 ms 2808 KB Output is correct
40 Correct 5 ms 2808 KB Output is correct
41 Correct 4 ms 2808 KB Output is correct
42 Correct 5 ms 2808 KB Output is correct
43 Correct 4 ms 2808 KB Output is correct
44 Correct 4 ms 2680 KB Output is correct
45 Correct 4 ms 2808 KB Output is correct
46 Correct 4 ms 2808 KB Output is correct
47 Correct 5 ms 2808 KB Output is correct
48 Correct 4 ms 2808 KB Output is correct
49 Correct 4 ms 2812 KB Output is correct
50 Correct 5 ms 2808 KB Output is correct
51 Correct 5 ms 2808 KB Output is correct
52 Correct 4 ms 2808 KB Output is correct
53 Correct 4 ms 2812 KB Output is correct

Subtask #3
0 / 67.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 2680 KB Output is correct
2 Correct 4 ms 2808 KB Output is correct
3 Correct 4 ms 2808 KB Output is correct
4 Correct 4 ms 2680 KB Output is correct
5 Correct 6 ms 2680 KB Output is correct
6 Correct 5 ms 2808 KB Output is correct
7 Correct 4 ms 2680 KB Output is correct
8 Correct 4 ms 2808 KB Output is correct
9 Correct 4 ms 2680 KB Output is correct
10 Correct 5 ms 2808 KB Output is correct
11 Correct 4 ms 2680 KB Output is correct
12 Correct 5 ms 2808 KB Output is correct
13 Correct 4 ms 2680 KB Output is correct
14 Correct 4 ms 2680 KB Output is correct
15 Correct 4 ms 2808 KB Output is correct
16 Correct 4 ms 2680 KB Output is correct
17 Correct 4 ms 2684 KB Output is correct
18 Correct 4 ms 2808 KB Output is correct
19 Correct 4 ms 2680 KB Output is correct
20 Correct 4 ms 2680 KB Output is correct
21 Correct 5 ms 2808 KB Output is correct
22 Correct 4 ms 2808 KB Output is correct
23 Correct 4 ms 2680 KB Output is correct
24 Correct 5 ms 2680 KB Output is correct
25 Correct 4 ms 2680 KB Output is correct
26 Correct 5 ms 2680 KB Output is correct
27 Correct 4 ms 2808 KB Output is correct
28 Correct 5 ms 2808 KB Output is correct
29 Correct 4 ms 2808 KB Output is correct
30 Correct 4 ms 2808 KB Output is correct
31 Correct 4 ms 2808 KB Output is correct
32 Correct 4 ms 2808 KB Output is correct
33 Correct 4 ms 2808 KB Output is correct
34 Correct 4 ms 2936 KB Output is correct
35 Correct 4 ms 2808 KB Output is correct
36 Correct 4 ms 2808 KB Output is correct
37 Correct 5 ms 2808 KB Output is correct
38 Correct 5 ms 2808 KB Output is correct
39 Correct 4 ms 2808 KB Output is correct
40 Correct 5 ms 2808 KB Output is correct
41 Correct 4 ms 2808 KB Output is correct
42 Correct 5 ms 2808 KB Output is correct
43 Correct 4 ms 2808 KB Output is correct
44 Correct 4 ms 2680 KB Output is correct
45 Correct 4 ms 2808 KB Output is correct
46 Correct 4 ms 2808 KB Output is correct
47 Correct 5 ms 2808 KB Output is correct
48 Correct 4 ms 2808 KB Output is correct
49 Correct 4 ms 2812 KB Output is correct
50 Correct 5 ms 2808 KB Output is correct
51 Correct 5 ms 2808 KB Output is correct
52 Correct 4 ms 2808 KB Output is correct
53 Correct 4 ms 2812 KB Output is correct
54 Correct 5 ms 2936 KB Output is correct
55 Correct 5 ms 3192 KB Output is correct
56 Correct 122 ms 69196 KB Output is correct
57 Correct 132 ms 69404 KB Output is correct
58 Runtime error 537 ms 262148 KB Execution killed with signal 9 (could be triggered by violating memory limits)
59 Halted 0 ms 0 KB -