oj.uz

답안 #153436

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
153436 2019-09-14T07:40:43 Z mhy908 Dango Maker (JOI18_dango_maker) C++14
33 / 100
 465 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;
char str[3010][3010];
int col[3010][3010][3], ans;
short int re[3010][3010];
vector<int> link[3500010], id;
int par[3300010];
bool used[3300010];
int dist[3300010];
int A[3300010], B[3300010];
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++){
        scanf("%s", str[i]+1);
    }
    for(int i=1; i<=n; i++){
        for(int j=1; j<=m; j++){
            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(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;
            }
        }
    }
    if(x>=3300000){
        while(1){
            x++;
        }
    }
    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:76:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%s", str[i]+1);
         ~~~~~^~~~~~~~~~~~~~~~

Subtask #1
13.0 / 13.0

# 결과 실행 시간 메모리 Grader output
1 Correct 75 ms 82552 KB Output is correct
2 Correct 76 ms 82552 KB Output is correct
3 Correct 76 ms 82552 KB Output is correct
4 Correct 76 ms 82552 KB Output is correct
5 Correct 76 ms 82552 KB Output is correct
6 Correct 76 ms 82740 KB Output is correct
7 Correct 81 ms 82804 KB Output is correct
8 Correct 76 ms 82680 KB Output is correct
9 Correct 76 ms 82680 KB Output is correct
10 Correct 76 ms 82680 KB Output is correct
11 Correct 77 ms 82680 KB Output is correct
12 Correct 77 ms 82684 KB Output is correct
13 Correct 76 ms 82564 KB Output is correct
14 Correct 76 ms 82556 KB Output is correct
15 Correct 75 ms 82568 KB Output is correct
16 Correct 76 ms 82552 KB Output is correct

Subtask #2
20.0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 75 ms 82552 KB Output is correct
2 Correct 76 ms 82552 KB Output is correct
3 Correct 76 ms 82552 KB Output is correct
4 Correct 76 ms 82552 KB Output is correct
5 Correct 76 ms 82552 KB Output is correct
6 Correct 76 ms 82740 KB Output is correct
7 Correct 81 ms 82804 KB Output is correct
8 Correct 76 ms 82680 KB Output is correct
9 Correct 76 ms 82680 KB Output is correct
10 Correct 76 ms 82680 KB Output is correct
11 Correct 77 ms 82680 KB Output is correct
12 Correct 77 ms 82684 KB Output is correct
13 Correct 76 ms 82564 KB Output is correct
14 Correct 76 ms 82556 KB Output is correct
15 Correct 75 ms 82568 KB Output is correct
16 Correct 76 ms 82552 KB Output is correct
17 Correct 76 ms 82640 KB Output is correct
18 Correct 76 ms 82680 KB Output is correct
19 Correct 76 ms 82628 KB Output is correct
20 Correct 76 ms 82680 KB Output is correct
21 Correct 76 ms 82680 KB Output is correct
22 Correct 75 ms 82716 KB Output is correct
23 Correct 76 ms 82680 KB Output is correct
24 Correct 76 ms 82604 KB Output is correct
25 Correct 77 ms 82552 KB Output is correct
26 Correct 76 ms 82552 KB Output is correct
27 Correct 76 ms 82680 KB Output is correct
28 Correct 76 ms 82680 KB Output is correct
29 Correct 77 ms 82680 KB Output is correct
30 Correct 76 ms 82680 KB Output is correct
31 Correct 157 ms 82652 KB Output is correct
32 Correct 74 ms 82680 KB Output is correct
33 Correct 76 ms 82652 KB Output is correct
34 Correct 76 ms 82724 KB Output is correct
35 Correct 75 ms 82652 KB Output is correct
36 Correct 76 ms 82680 KB Output is correct
37 Correct 82 ms 82712 KB Output is correct
38 Correct 83 ms 82680 KB Output is correct
39 Correct 76 ms 82680 KB Output is correct
40 Correct 75 ms 82724 KB Output is correct
41 Correct 76 ms 82680 KB Output is correct
42 Correct 76 ms 82644 KB Output is correct
43 Correct 78 ms 82808 KB Output is correct
44 Correct 76 ms 82680 KB Output is correct
45 Correct 76 ms 82680 KB Output is correct
46 Correct 91 ms 82680 KB Output is correct
47 Correct 80 ms 82796 KB Output is correct
48 Correct 76 ms 82680 KB Output is correct
49 Correct 77 ms 82652 KB Output is correct
50 Correct 89 ms 82680 KB Output is correct
51 Correct 77 ms 82680 KB Output is correct
52 Correct 76 ms 82680 KB Output is correct
53 Correct 76 ms 82680 KB Output is correct

Subtask #3
0 / 67.0

# 결과 실행 시간 메모리 Grader output
1 Correct 75 ms 82552 KB Output is correct
2 Correct 76 ms 82552 KB Output is correct
3 Correct 76 ms 82552 KB Output is correct
4 Correct 76 ms 82552 KB Output is correct
5 Correct 76 ms 82552 KB Output is correct
6 Correct 76 ms 82740 KB Output is correct
7 Correct 81 ms 82804 KB Output is correct
8 Correct 76 ms 82680 KB Output is correct
9 Correct 76 ms 82680 KB Output is correct
10 Correct 76 ms 82680 KB Output is correct
11 Correct 77 ms 82680 KB Output is correct
12 Correct 77 ms 82684 KB Output is correct
13 Correct 76 ms 82564 KB Output is correct
14 Correct 76 ms 82556 KB Output is correct
15 Correct 75 ms 82568 KB Output is correct
16 Correct 76 ms 82552 KB Output is correct
17 Correct 76 ms 82640 KB Output is correct
18 Correct 76 ms 82680 KB Output is correct
19 Correct 76 ms 82628 KB Output is correct
20 Correct 76 ms 82680 KB Output is correct
21 Correct 76 ms 82680 KB Output is correct
22 Correct 75 ms 82716 KB Output is correct
23 Correct 76 ms 82680 KB Output is correct
24 Correct 76 ms 82604 KB Output is correct
25 Correct 77 ms 82552 KB Output is correct
26 Correct 76 ms 82552 KB Output is correct
27 Correct 76 ms 82680 KB Output is correct
28 Correct 76 ms 82680 KB Output is correct
29 Correct 77 ms 82680 KB Output is correct
30 Correct 76 ms 82680 KB Output is correct
31 Correct 157 ms 82652 KB Output is correct
32 Correct 74 ms 82680 KB Output is correct
33 Correct 76 ms 82652 KB Output is correct
34 Correct 76 ms 82724 KB Output is correct
35 Correct 75 ms 82652 KB Output is correct
36 Correct 76 ms 82680 KB Output is correct
37 Correct 82 ms 82712 KB Output is correct
38 Correct 83 ms 82680 KB Output is correct
39 Correct 76 ms 82680 KB Output is correct
40 Correct 75 ms 82724 KB Output is correct
41 Correct 76 ms 82680 KB Output is correct
42 Correct 76 ms 82644 KB Output is correct
43 Correct 78 ms 82808 KB Output is correct
44 Correct 76 ms 82680 KB Output is correct
45 Correct 76 ms 82680 KB Output is correct
46 Correct 91 ms 82680 KB Output is correct
47 Correct 80 ms 82796 KB Output is correct
48 Correct 76 ms 82680 KB Output is correct
49 Correct 77 ms 82652 KB Output is correct
50 Correct 89 ms 82680 KB Output is correct
51 Correct 77 ms 82680 KB Output is correct
52 Correct 76 ms 82680 KB Output is correct
53 Correct 76 ms 82680 KB Output is correct
54 Correct 80 ms 82608 KB Output is correct
55 Correct 104 ms 94072 KB Output is correct
56 Correct 88 ms 83036 KB Output is correct
57 Correct 97 ms 104992 KB Output is correct
58 Correct 137 ms 113436 KB Output is correct
59 Runtime error 465 ms 262148 KB Execution killed with signal 9 (could be triggered by violating memory limits)
60 Halted 0 ms 0 KB -