oj.uz

Submission #153443

# Submission time Handle Problem Language Result Execution time Memory
153443 2019-09-14T07:49:41 Z mhy908 Dango Maker (JOI18_dango_maker) C++14
33 / 100
 1020 ms 257716 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][3], ans;
short int re[3010][3010];
vector<int> link[3000010], id;
int par[3500010];
bool used[3000010];
int dist[3000010];
int A[3000010], B[3000010];
vector<vector<int> > vc;
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)
{
    queue<int> Q;
    for(int i=0; i<vc[p].size(); i++){
        if(!used[vc[p][i]]){
            dist[vc[p][i]]=0;
            Q.push(vc[p][i]);
        }
        else dist[vc[p][i]]=INF;
    }
    while(!Q.empty()){
        int a=Q.front();
        Q.pop();
        for(int b: link[a]){
            if(B[b]!=-1&&dist[B[b]]==INF){
                dist[B[b]]=dist[a]+1;
                Q.push(B[b]);
            }
        }
    }
}
bool dfs(int a){
    for(int b: link[a]){
        if(B[b]==-1||dist[B[b]]==dist[a]+1&&dfs(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[vc[p][i]] && dfs(vc[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].resize(0);
    if(x>=3500000){
        printf("FUCK Memory Limit\n");
        return 0;
    }
    for(int i=1; i<=x; i++)par[i]=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][2]);
                link[col[i][j][1]].pb(col[i][j][2]);
                link[col[i][j][2]].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.resize(0);
    vc.resize(maxpar);
    for(int i=1; i<=x; i++){
        vc[par[i]].pb(i);
    }
    fill(A+1, A+x+1, -1);
    fill(B+1, B+x+1, -1);
    for(int i=0; i<maxpar; i++){
        if(vc[i].size()==1)ans++;
        else ans+=vc[i].size()-hopcroft_carp(i);
    }
    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)':
dango_maker.cpp:50:43: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
         if(B[b]==-1||dist[B[b]]==dist[a]+1&&dfs(B[b])){
                      ~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~
dango_maker.cpp: In function 'int hopcroft_carp(int)':
dango_maker.cpp:65:23: 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:74:10: 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:79:18: 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 66 ms 70904 KB Output is correct
2 Correct 66 ms 70840 KB Output is correct
3 Correct 66 ms 70872 KB Output is correct
4 Correct 65 ms 70908 KB Output is correct
5 Correct 65 ms 70776 KB Output is correct
6 Correct 65 ms 70904 KB Output is correct
7 Correct 72 ms 70972 KB Output is correct
8 Correct 76 ms 71120 KB Output is correct
9 Correct 81 ms 70904 KB Output is correct
10 Correct 76 ms 70880 KB Output is correct
11 Correct 67 ms 71032 KB Output is correct
12 Correct 65 ms 70880 KB Output is correct
13 Correct 66 ms 71032 KB Output is correct
14 Correct 66 ms 70904 KB Output is correct
15 Correct 66 ms 71032 KB Output is correct
16 Correct 66 ms 70860 KB Output is correct

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 66 ms 70904 KB Output is correct
2 Correct 66 ms 70840 KB Output is correct
3 Correct 66 ms 70872 KB Output is correct
4 Correct 65 ms 70908 KB Output is correct
5 Correct 65 ms 70776 KB Output is correct
6 Correct 65 ms 70904 KB Output is correct
7 Correct 72 ms 70972 KB Output is correct
8 Correct 76 ms 71120 KB Output is correct
9 Correct 81 ms 70904 KB Output is correct
10 Correct 76 ms 70880 KB Output is correct
11 Correct 67 ms 71032 KB Output is correct
12 Correct 65 ms 70880 KB Output is correct
13 Correct 66 ms 71032 KB Output is correct
14 Correct 66 ms 70904 KB Output is correct
15 Correct 66 ms 71032 KB Output is correct
16 Correct 66 ms 70860 KB Output is correct
17 Correct 66 ms 70860 KB Output is correct
18 Correct 66 ms 70904 KB Output is correct
19 Correct 66 ms 70904 KB Output is correct
20 Correct 65 ms 71032 KB Output is correct
21 Correct 67 ms 70952 KB Output is correct
22 Correct 65 ms 70996 KB Output is correct
23 Correct 66 ms 70984 KB Output is correct
24 Correct 66 ms 70904 KB Output is correct
25 Correct 66 ms 70852 KB Output is correct
26 Correct 66 ms 70876 KB Output is correct
27 Correct 66 ms 71004 KB Output is correct
28 Correct 66 ms 71156 KB Output is correct
29 Correct 66 ms 70904 KB Output is correct
30 Correct 66 ms 71032 KB Output is correct
31 Correct 66 ms 70904 KB Output is correct
32 Correct 66 ms 70936 KB Output is correct
33 Correct 65 ms 70904 KB Output is correct
34 Correct 65 ms 70984 KB Output is correct
35 Correct 65 ms 70904 KB Output is correct
36 Correct 67 ms 71012 KB Output is correct
37 Correct 66 ms 71004 KB Output is correct
38 Correct 67 ms 71032 KB Output is correct
39 Correct 66 ms 70904 KB Output is correct
40 Correct 65 ms 70904 KB Output is correct
41 Correct 68 ms 71032 KB Output is correct
42 Correct 72 ms 70972 KB Output is correct
43 Correct 79 ms 70904 KB Output is correct
44 Correct 67 ms 71016 KB Output is correct
45 Correct 66 ms 71032 KB Output is correct
46 Correct 66 ms 71032 KB Output is correct
47 Correct 66 ms 71032 KB Output is correct
48 Correct 66 ms 71032 KB Output is correct
49 Correct 65 ms 70904 KB Output is correct
50 Correct 78 ms 70908 KB Output is correct
51 Correct 66 ms 70952 KB Output is correct
52 Correct 66 ms 71032 KB Output is correct
53 Correct 66 ms 71032 KB Output is correct

Subtask #3
0 / 67.0

# Verdict Execution time Memory Grader output
1 Correct 66 ms 70904 KB Output is correct
2 Correct 66 ms 70840 KB Output is correct
3 Correct 66 ms 70872 KB Output is correct
4 Correct 65 ms 70908 KB Output is correct
5 Correct 65 ms 70776 KB Output is correct
6 Correct 65 ms 70904 KB Output is correct
7 Correct 72 ms 70972 KB Output is correct
8 Correct 76 ms 71120 KB Output is correct
9 Correct 81 ms 70904 KB Output is correct
10 Correct 76 ms 70880 KB Output is correct
11 Correct 67 ms 71032 KB Output is correct
12 Correct 65 ms 70880 KB Output is correct
13 Correct 66 ms 71032 KB Output is correct
14 Correct 66 ms 70904 KB Output is correct
15 Correct 66 ms 71032 KB Output is correct
16 Correct 66 ms 70860 KB Output is correct
17 Correct 66 ms 70860 KB Output is correct
18 Correct 66 ms 70904 KB Output is correct
19 Correct 66 ms 70904 KB Output is correct
20 Correct 65 ms 71032 KB Output is correct
21 Correct 67 ms 70952 KB Output is correct
22 Correct 65 ms 70996 KB Output is correct
23 Correct 66 ms 70984 KB Output is correct
24 Correct 66 ms 70904 KB Output is correct
25 Correct 66 ms 70852 KB Output is correct
26 Correct 66 ms 70876 KB Output is correct
27 Correct 66 ms 71004 KB Output is correct
28 Correct 66 ms 71156 KB Output is correct
29 Correct 66 ms 70904 KB Output is correct
30 Correct 66 ms 71032 KB Output is correct
31 Correct 66 ms 70904 KB Output is correct
32 Correct 66 ms 70936 KB Output is correct
33 Correct 65 ms 70904 KB Output is correct
34 Correct 65 ms 70984 KB Output is correct
35 Correct 65 ms 70904 KB Output is correct
36 Correct 67 ms 71012 KB Output is correct
37 Correct 66 ms 71004 KB Output is correct
38 Correct 67 ms 71032 KB Output is correct
39 Correct 66 ms 70904 KB Output is correct
40 Correct 65 ms 70904 KB Output is correct
41 Correct 68 ms 71032 KB Output is correct
42 Correct 72 ms 70972 KB Output is correct
43 Correct 79 ms 70904 KB Output is correct
44 Correct 67 ms 71016 KB Output is correct
45 Correct 66 ms 71032 KB Output is correct
46 Correct 66 ms 71032 KB Output is correct
47 Correct 66 ms 71032 KB Output is correct
48 Correct 66 ms 71032 KB Output is correct
49 Correct 65 ms 70904 KB Output is correct
50 Correct 78 ms 70908 KB Output is correct
51 Correct 66 ms 70952 KB Output is correct
52 Correct 66 ms 71032 KB Output is correct
53 Correct 66 ms 71032 KB Output is correct
54 Correct 65 ms 70904 KB Output is correct
55 Correct 73 ms 73668 KB Output is correct
56 Correct 77 ms 71416 KB Output is correct
57 Correct 84 ms 87416 KB Output is correct
58 Correct 181 ms 99676 KB Output is correct
59 Correct 1020 ms 257632 KB Output is correct
60 Correct 1018 ms 257716 KB Output is correct
61 Correct 1014 ms 257624 KB Output is correct
62 Correct 66 ms 70904 KB Output is correct
63 Correct 980 ms 256156 KB Output is correct
64 Incorrect 739 ms 206736 KB Output isn't correct
65 Halted 0 ms 0 KB -