oj.uz

Submission #153471

# Submission time Handle Problem Language Result Execution time Memory
153471 2019-09-14T08:46:24 Z mhy908 Dango Maker (JOI18_dango_maker) C++14
33 / 100
 909 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> link[6000001], id;
vector<int> par;
vector<bool> used;
vector<int> dist, A, B;
vector<vector<int> > vc;
map<int, int> mp;
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[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].resize(0);
    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.resize(0);
    vc.resize(maxpar);
    for(int i=1; i<=x; i++){
        vc[par[i]].pb(i);
    }
    par.resize(0);
    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, false);
            dist.resize(vc[i].size()+2, 0);
            A.resize(vc[i].size()+2, -1);
            B.resize(vc[i].size()+2, -1);
            ans+=vc[i].size()-hopcroft_carp(i);
            mp.clear();
            dist.resize(0);
            A.resize(0);
            B.resize(0);
            used.resize(0);
        }
    }
    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:133:27: 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: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 127 ms 141352 KB Output is correct
2 Correct 127 ms 141348 KB Output is correct
3 Correct 129 ms 141272 KB Output is correct
4 Correct 128 ms 141304 KB Output is correct
5 Correct 129 ms 141220 KB Output is correct
6 Correct 152 ms 141304 KB Output is correct
7 Correct 149 ms 141288 KB Output is correct
8 Correct 143 ms 141432 KB Output is correct
9 Correct 141 ms 141432 KB Output is correct
10 Correct 128 ms 141396 KB Output is correct
11 Correct 128 ms 141304 KB Output is correct
12 Correct 129 ms 141308 KB Output is correct
13 Correct 130 ms 141384 KB Output is correct
14 Correct 127 ms 141276 KB Output is correct
15 Correct 128 ms 141392 KB Output is correct
16 Correct 127 ms 141292 KB Output is correct

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 127 ms 141352 KB Output is correct
2 Correct 127 ms 141348 KB Output is correct
3 Correct 129 ms 141272 KB Output is correct
4 Correct 128 ms 141304 KB Output is correct
5 Correct 129 ms 141220 KB Output is correct
6 Correct 152 ms 141304 KB Output is correct
7 Correct 149 ms 141288 KB Output is correct
8 Correct 143 ms 141432 KB Output is correct
9 Correct 141 ms 141432 KB Output is correct
10 Correct 128 ms 141396 KB Output is correct
11 Correct 128 ms 141304 KB Output is correct
12 Correct 129 ms 141308 KB Output is correct
13 Correct 130 ms 141384 KB Output is correct
14 Correct 127 ms 141276 KB Output is correct
15 Correct 128 ms 141392 KB Output is correct
16 Correct 127 ms 141292 KB Output is correct
17 Correct 126 ms 141384 KB Output is correct
18 Correct 128 ms 141432 KB Output is correct
19 Correct 127 ms 141360 KB Output is correct
20 Correct 128 ms 141552 KB Output is correct
21 Correct 128 ms 141404 KB Output is correct
22 Correct 129 ms 141492 KB Output is correct
23 Correct 135 ms 141356 KB Output is correct
24 Correct 147 ms 141404 KB Output is correct
25 Correct 129 ms 141276 KB Output is correct
26 Correct 128 ms 141304 KB Output is correct
27 Correct 128 ms 141304 KB Output is correct
28 Correct 129 ms 141432 KB Output is correct
29 Correct 130 ms 141432 KB Output is correct
30 Correct 127 ms 141304 KB Output is correct
31 Correct 129 ms 141432 KB Output is correct
32 Correct 128 ms 141432 KB Output is correct
33 Correct 127 ms 141360 KB Output is correct
34 Correct 129 ms 141432 KB Output is correct
35 Correct 128 ms 141388 KB Output is correct
36 Correct 128 ms 141432 KB Output is correct
37 Correct 131 ms 141516 KB Output is correct
38 Correct 150 ms 141448 KB Output is correct
39 Correct 130 ms 141464 KB Output is correct
40 Correct 152 ms 141404 KB Output is correct
41 Correct 130 ms 141432 KB Output is correct
42 Correct 128 ms 141432 KB Output is correct
43 Correct 127 ms 141432 KB Output is correct
44 Correct 128 ms 141308 KB Output is correct
45 Correct 139 ms 141352 KB Output is correct
46 Correct 128 ms 141432 KB Output is correct
47 Correct 129 ms 141436 KB Output is correct
48 Correct 130 ms 141432 KB Output is correct
49 Correct 151 ms 141432 KB Output is correct
50 Correct 130 ms 141432 KB Output is correct
51 Correct 129 ms 141416 KB Output is correct
52 Correct 129 ms 141308 KB Output is correct
53 Correct 130 ms 141524 KB Output is correct

Subtask #3
0 / 67.0

# Verdict Execution time Memory Grader output
1 Correct 127 ms 141352 KB Output is correct
2 Correct 127 ms 141348 KB Output is correct
3 Correct 129 ms 141272 KB Output is correct
4 Correct 128 ms 141304 KB Output is correct
5 Correct 129 ms 141220 KB Output is correct
6 Correct 152 ms 141304 KB Output is correct
7 Correct 149 ms 141288 KB Output is correct
8 Correct 143 ms 141432 KB Output is correct
9 Correct 141 ms 141432 KB Output is correct
10 Correct 128 ms 141396 KB Output is correct
11 Correct 128 ms 141304 KB Output is correct
12 Correct 129 ms 141308 KB Output is correct
13 Correct 130 ms 141384 KB Output is correct
14 Correct 127 ms 141276 KB Output is correct
15 Correct 128 ms 141392 KB Output is correct
16 Correct 127 ms 141292 KB Output is correct
17 Correct 126 ms 141384 KB Output is correct
18 Correct 128 ms 141432 KB Output is correct
19 Correct 127 ms 141360 KB Output is correct
20 Correct 128 ms 141552 KB Output is correct
21 Correct 128 ms 141404 KB Output is correct
22 Correct 129 ms 141492 KB Output is correct
23 Correct 135 ms 141356 KB Output is correct
24 Correct 147 ms 141404 KB Output is correct
25 Correct 129 ms 141276 KB Output is correct
26 Correct 128 ms 141304 KB Output is correct
27 Correct 128 ms 141304 KB Output is correct
28 Correct 129 ms 141432 KB Output is correct
29 Correct 130 ms 141432 KB Output is correct
30 Correct 127 ms 141304 KB Output is correct
31 Correct 129 ms 141432 KB Output is correct
32 Correct 128 ms 141432 KB Output is correct
33 Correct 127 ms 141360 KB Output is correct
34 Correct 129 ms 141432 KB Output is correct
35 Correct 128 ms 141388 KB Output is correct
36 Correct 128 ms 141432 KB Output is correct
37 Correct 131 ms 141516 KB Output is correct
38 Correct 150 ms 141448 KB Output is correct
39 Correct 130 ms 141464 KB Output is correct
40 Correct 152 ms 141404 KB Output is correct
41 Correct 130 ms 141432 KB Output is correct
42 Correct 128 ms 141432 KB Output is correct
43 Correct 127 ms 141432 KB Output is correct
44 Correct 128 ms 141308 KB Output is correct
45 Correct 139 ms 141352 KB Output is correct
46 Correct 128 ms 141432 KB Output is correct
47 Correct 129 ms 141436 KB Output is correct
48 Correct 130 ms 141432 KB Output is correct
49 Correct 151 ms 141432 KB Output is correct
50 Correct 130 ms 141432 KB Output is correct
51 Correct 129 ms 141416 KB Output is correct
52 Correct 129 ms 141308 KB Output is correct
53 Correct 130 ms 141524 KB Output is correct
54 Correct 128 ms 141304 KB Output is correct
55 Correct 134 ms 144080 KB Output is correct
56 Correct 131 ms 141764 KB Output is correct
57 Correct 147 ms 157688 KB Output is correct
58 Correct 241 ms 165168 KB Output is correct
59 Runtime error 909 ms 262148 KB Execution killed with signal 9 (could be triggered by violating memory limits)
60 Halted 0 ms 0 KB -