oj.uz

Submission #153541

# Submission time Handle Problem Language Result Execution time Memory
153541 2019-09-14T15:12:52 Z mhy908 Dango Maker (JOI18_dango_maker) C++14
33 / 100
 961 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 col[3010][3010][2], ans;
short re[3010][3010];
vector<int> id;
vector<int> par;
vector<bool> used;
vector<int> dist, A, B;
vector<vector<int> > vc, link;
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);
        }
    }
    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][re[i][j]++]=x;
                    col[i][j+1][re[i][j+1]++]=x;
                    col[i][j+2][re[i][j+2]++]=x;
                }
            if(i+2<=n)
                if(str[i][j]=='R'&&str[i+1][j]=='G'&&str[i+2][j]=='W'){
                    ++x;
                    col[i][j][re[i][j]++]=x;
                    col[i+1][j][re[i+1][j]++]=x;
                    col[i+2][j][re[i+2][j]++]=x;
                }
        }
    }
    for(int i=1; i<=n; i++){
        str[i].clear();
        vector<char>().swap(str[i]);
    }
    link.resize(x+1);
    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(re[i][j]==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]);
            }
        }
    }
    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:30:19: 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:52:43: 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:67:23: 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:139:27: 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:144:27: 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:76:10: 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:81:18: 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 2 ms 380 KB Output is correct
2 Correct 2 ms 376 KB Output is correct
3 Correct 2 ms 380 KB Output is correct
4 Correct 2 ms 376 KB Output is correct
5 Correct 2 ms 424 KB Output is correct
6 Correct 2 ms 504 KB Output is correct
7 Correct 2 ms 376 KB Output is correct
8 Correct 2 ms 376 KB Output is correct
9 Correct 2 ms 504 KB Output is correct
10 Correct 2 ms 376 KB Output is correct
11 Correct 2 ms 376 KB Output is correct
12 Correct 2 ms 504 KB Output is correct
13 Correct 2 ms 376 KB Output is correct
14 Correct 2 ms 376 KB Output is correct
15 Correct 2 ms 380 KB Output is correct
16 Correct 2 ms 504 KB Output is correct

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 380 KB Output is correct
2 Correct 2 ms 376 KB Output is correct
3 Correct 2 ms 380 KB Output is correct
4 Correct 2 ms 376 KB Output is correct
5 Correct 2 ms 424 KB Output is correct
6 Correct 2 ms 504 KB Output is correct
7 Correct 2 ms 376 KB Output is correct
8 Correct 2 ms 376 KB Output is correct
9 Correct 2 ms 504 KB Output is correct
10 Correct 2 ms 376 KB Output is correct
11 Correct 2 ms 376 KB Output is correct
12 Correct 2 ms 504 KB Output is correct
13 Correct 2 ms 376 KB Output is correct
14 Correct 2 ms 376 KB Output is correct
15 Correct 2 ms 380 KB Output is correct
16 Correct 2 ms 504 KB Output is correct
17 Correct 2 ms 376 KB Output is correct
18 Correct 2 ms 376 KB Output is correct
19 Correct 2 ms 504 KB Output is correct
20 Correct 2 ms 504 KB Output is correct
21 Correct 2 ms 504 KB Output is correct
22 Correct 2 ms 504 KB Output is correct
23 Correct 2 ms 376 KB Output is correct
24 Correct 2 ms 376 KB Output is correct
25 Correct 2 ms 376 KB Output is correct
26 Correct 2 ms 376 KB Output is correct
27 Correct 2 ms 504 KB Output is correct
28 Correct 2 ms 504 KB Output is correct
29 Correct 2 ms 504 KB Output is correct
30 Correct 2 ms 504 KB Output is correct
31 Correct 3 ms 504 KB Output is correct
32 Correct 2 ms 504 KB Output is correct
33 Correct 2 ms 504 KB Output is correct
34 Correct 2 ms 636 KB Output is correct
35 Correct 2 ms 504 KB Output is correct
36 Correct 2 ms 504 KB Output is correct
37 Correct 2 ms 504 KB Output is correct
38 Correct 2 ms 504 KB Output is correct
39 Correct 2 ms 504 KB Output is correct
40 Correct 3 ms 504 KB Output is correct
41 Correct 2 ms 424 KB Output is correct
42 Correct 2 ms 428 KB Output is correct
43 Correct 2 ms 504 KB Output is correct
44 Correct 2 ms 504 KB Output is correct
45 Correct 2 ms 504 KB Output is correct
46 Correct 2 ms 504 KB Output is correct
47 Correct 2 ms 504 KB Output is correct
48 Correct 2 ms 504 KB Output is correct
49 Correct 2 ms 504 KB Output is correct
50 Correct 2 ms 504 KB Output is correct
51 Correct 2 ms 504 KB Output is correct
52 Correct 2 ms 504 KB Output is correct
53 Correct 2 ms 504 KB Output is correct

Subtask #3
0 / 67.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 380 KB Output is correct
2 Correct 2 ms 376 KB Output is correct
3 Correct 2 ms 380 KB Output is correct
4 Correct 2 ms 376 KB Output is correct
5 Correct 2 ms 424 KB Output is correct
6 Correct 2 ms 504 KB Output is correct
7 Correct 2 ms 376 KB Output is correct
8 Correct 2 ms 376 KB Output is correct
9 Correct 2 ms 504 KB Output is correct
10 Correct 2 ms 376 KB Output is correct
11 Correct 2 ms 376 KB Output is correct
12 Correct 2 ms 504 KB Output is correct
13 Correct 2 ms 376 KB Output is correct
14 Correct 2 ms 376 KB Output is correct
15 Correct 2 ms 380 KB Output is correct
16 Correct 2 ms 504 KB Output is correct
17 Correct 2 ms 376 KB Output is correct
18 Correct 2 ms 376 KB Output is correct
19 Correct 2 ms 504 KB Output is correct
20 Correct 2 ms 504 KB Output is correct
21 Correct 2 ms 504 KB Output is correct
22 Correct 2 ms 504 KB Output is correct
23 Correct 2 ms 376 KB Output is correct
24 Correct 2 ms 376 KB Output is correct
25 Correct 2 ms 376 KB Output is correct
26 Correct 2 ms 376 KB Output is correct
27 Correct 2 ms 504 KB Output is correct
28 Correct 2 ms 504 KB Output is correct
29 Correct 2 ms 504 KB Output is correct
30 Correct 2 ms 504 KB Output is correct
31 Correct 3 ms 504 KB Output is correct
32 Correct 2 ms 504 KB Output is correct
33 Correct 2 ms 504 KB Output is correct
34 Correct 2 ms 636 KB Output is correct
35 Correct 2 ms 504 KB Output is correct
36 Correct 2 ms 504 KB Output is correct
37 Correct 2 ms 504 KB Output is correct
38 Correct 2 ms 504 KB Output is correct
39 Correct 2 ms 504 KB Output is correct
40 Correct 3 ms 504 KB Output is correct
41 Correct 2 ms 424 KB Output is correct
42 Correct 2 ms 428 KB Output is correct
43 Correct 2 ms 504 KB Output is correct
44 Correct 2 ms 504 KB Output is correct
45 Correct 2 ms 504 KB Output is correct
46 Correct 2 ms 504 KB Output is correct
47 Correct 2 ms 504 KB Output is correct
48 Correct 2 ms 504 KB Output is correct
49 Correct 2 ms 504 KB Output is correct
50 Correct 2 ms 504 KB Output is correct
51 Correct 2 ms 504 KB Output is correct
52 Correct 2 ms 504 KB Output is correct
53 Correct 2 ms 504 KB Output is correct
54 Correct 2 ms 376 KB Output is correct
55 Correct 9 ms 3064 KB Output is correct
56 Correct 4 ms 760 KB Output is correct
57 Correct 21 ms 16760 KB Output is correct
58 Correct 115 ms 24760 KB Output is correct
59 Correct 937 ms 145620 KB Output is correct
60 Correct 961 ms 145524 KB Output is correct
61 Correct 935 ms 145336 KB Output is correct
62 Correct 3 ms 504 KB Output is correct
63 Correct 960 ms 143440 KB Output is correct
64 Runtime error 868 ms 262148 KB Execution killed with signal 9 (could be triggered by violating memory limits)
65 Halted 0 ms 0 KB -