oj.uz

Submission #521981

# Submission time Handle Problem Language Result Execution time Memory
521981 2022-02-03T14:42:08 Z Monarchuwu Dango Maker (JOI18_dango_maker) C++17
33 / 100
 159 ms 262148 KB 
#include<iostream>
#include<algorithm>
#include<vector>
#include<queue>
#include<cassert>
using namespace std;
typedef long long ll;

const int N = 3000 + 3, N2 = N * N, inf = 1e9 + 7;
int m, n;
char c[N][N];
vector<int> vertexX;

int cnt, num[2][N][N];
vector<int> g[N2];
void init_graph() {
    for (int i = 0; i < m; ++i)
        for (int j = 0; j < n; ++j) if (c[i][j] == 'G') {

            // check ngang
            if (j > 0 && j + 1 < n && c[i][j - 1] == 'R' && c[i][j + 1] == 'W') {
                num[0][i][j] = ++cnt;
                assert(cnt < N2);
                vertexX.push_back(num[0][i][j]);

                if (num[1][i - 1][j + 1])
                    g[num[0][i][j]].push_back(num[1][i - 1][j + 1]);
            }

            // check dọc
            if (i > 0 && i + 1 < m && c[i - 1][j] == 'R' && c[i + 1][j] == 'W') {
                num[1][i][j] = ++cnt;
                assert(cnt < N2);

                if (num[0][i - 1][j + 1])
                    g[num[0][i - 1][j + 1]].push_back(num[1][i][j]);
            }

            if (num[0][i][j] && num[1][i][j])
                g[num[0][i][j]].push_back(num[1][i][j]);
        }
}

int mat[N2];
int dist[N2];
bool bfs() {
    queue<int> q;
    dist[0] = inf;
    for (int i : vertexX)
        if (mat[i]) dist[i] = inf;
        else {
            dist[i] = 0;
            q.push(i);
        }

    while (!q.empty()) {
        int u = q.front(); q.pop();
        for (int v : g[u]) {
            if (dist[mat[v]] == inf) {
                dist[mat[v]] = dist[u] + 1;
                q.push(mat[v]);
            }
        }
    }
    return dist[0] != inf;
}

bool dfs(int u) {
    for (int v : g[u]) {
        if (!mat[v] || (dist[mat[v]] == dist[u] + 1 && dfs(mat[v]))) {
            mat[v] = u, mat[u] = v;
            dist[u] = inf;
            return true;
        }
    }
    dist[u] = inf;
    return false;
}

int hopcroft_karp() {
    int ans(0);
    while (bfs()) {
        for (int i : vertexX)
            if (!mat[i] && dfs(i)) ++ans;
    }
    return ans;
}

int main() {
    cin.tie(NULL)->sync_with_stdio(false);
    cin >> m >> n;
    for (int i = 0; i < m; ++i) cin >> c[i];
    init_graph();

    cout << cnt - hopcroft_karp() << '\n';
}
/**  /\_/\
 *  (= ._.)
 *  / >0  \>1
**/

Subtask #1
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 98 ms 212024 KB Output is correct
2 Correct 124 ms 211996 KB Output is correct
3 Correct 95 ms 212072 KB Output is correct
4 Correct 96 ms 212068 KB Output is correct
5 Correct 94 ms 212008 KB Output is correct
6 Correct 95 ms 212072 KB Output is correct
7 Correct 113 ms 212124 KB Output is correct
8 Correct 100 ms 212080 KB Output is correct
9 Correct 105 ms 212028 KB Output is correct
10 Correct 101 ms 212036 KB Output is correct
11 Correct 96 ms 212108 KB Output is correct
12 Correct 97 ms 212092 KB Output is correct
13 Correct 101 ms 212104 KB Output is correct
14 Correct 108 ms 211996 KB Output is correct
15 Correct 103 ms 212020 KB Output is correct
16 Correct 95 ms 212056 KB Output is correct

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 98 ms 212024 KB Output is correct
2 Correct 124 ms 211996 KB Output is correct
3 Correct 95 ms 212072 KB Output is correct
4 Correct 96 ms 212068 KB Output is correct
5 Correct 94 ms 212008 KB Output is correct
6 Correct 95 ms 212072 KB Output is correct
7 Correct 113 ms 212124 KB Output is correct
8 Correct 100 ms 212080 KB Output is correct
9 Correct 105 ms 212028 KB Output is correct
10 Correct 101 ms 212036 KB Output is correct
11 Correct 96 ms 212108 KB Output is correct
12 Correct 97 ms 212092 KB Output is correct
13 Correct 101 ms 212104 KB Output is correct
14 Correct 108 ms 211996 KB Output is correct
15 Correct 103 ms 212020 KB Output is correct
16 Correct 95 ms 212056 KB Output is correct
17 Correct 99 ms 212056 KB Output is correct
18 Correct 100 ms 212072 KB Output is correct
19 Correct 103 ms 212124 KB Output is correct
20 Correct 106 ms 212152 KB Output is correct
21 Correct 108 ms 212164 KB Output is correct
22 Correct 97 ms 212164 KB Output is correct
23 Correct 108 ms 212076 KB Output is correct
24 Correct 106 ms 212116 KB Output is correct
25 Correct 109 ms 212032 KB Output is correct
26 Correct 102 ms 212152 KB Output is correct
27 Correct 96 ms 212084 KB Output is correct
28 Correct 96 ms 212128 KB Output is correct
29 Correct 95 ms 212188 KB Output is correct
30 Correct 101 ms 212036 KB Output is correct
31 Correct 113 ms 212164 KB Output is correct
32 Correct 95 ms 212064 KB Output is correct
33 Correct 94 ms 212108 KB Output is correct
34 Correct 98 ms 212172 KB Output is correct
35 Correct 109 ms 212192 KB Output is correct
36 Correct 101 ms 212140 KB Output is correct
37 Correct 95 ms 212164 KB Output is correct
38 Correct 94 ms 212180 KB Output is correct
39 Correct 95 ms 212080 KB Output is correct
40 Correct 115 ms 212164 KB Output is correct
41 Correct 106 ms 212084 KB Output is correct
42 Correct 93 ms 212180 KB Output is correct
43 Correct 94 ms 212164 KB Output is correct
44 Correct 100 ms 212116 KB Output is correct
45 Correct 113 ms 212084 KB Output is correct
46 Correct 100 ms 212168 KB Output is correct
47 Correct 98 ms 212160 KB Output is correct
48 Correct 96 ms 212132 KB Output is correct
49 Correct 95 ms 212160 KB Output is correct
50 Correct 98 ms 212124 KB Output is correct
51 Correct 103 ms 212192 KB Output is correct
52 Correct 96 ms 212148 KB Output is correct
53 Correct 99 ms 212116 KB Output is correct

Subtask #3
0 / 67.0

# Verdict Execution time Memory Grader output
1 Correct 98 ms 212024 KB Output is correct
2 Correct 124 ms 211996 KB Output is correct
3 Correct 95 ms 212072 KB Output is correct
4 Correct 96 ms 212068 KB Output is correct
5 Correct 94 ms 212008 KB Output is correct
6 Correct 95 ms 212072 KB Output is correct
7 Correct 113 ms 212124 KB Output is correct
8 Correct 100 ms 212080 KB Output is correct
9 Correct 105 ms 212028 KB Output is correct
10 Correct 101 ms 212036 KB Output is correct
11 Correct 96 ms 212108 KB Output is correct
12 Correct 97 ms 212092 KB Output is correct
13 Correct 101 ms 212104 KB Output is correct
14 Correct 108 ms 211996 KB Output is correct
15 Correct 103 ms 212020 KB Output is correct
16 Correct 95 ms 212056 KB Output is correct
17 Correct 99 ms 212056 KB Output is correct
18 Correct 100 ms 212072 KB Output is correct
19 Correct 103 ms 212124 KB Output is correct
20 Correct 106 ms 212152 KB Output is correct
21 Correct 108 ms 212164 KB Output is correct
22 Correct 97 ms 212164 KB Output is correct
23 Correct 108 ms 212076 KB Output is correct
24 Correct 106 ms 212116 KB Output is correct
25 Correct 109 ms 212032 KB Output is correct
26 Correct 102 ms 212152 KB Output is correct
27 Correct 96 ms 212084 KB Output is correct
28 Correct 96 ms 212128 KB Output is correct
29 Correct 95 ms 212188 KB Output is correct
30 Correct 101 ms 212036 KB Output is correct
31 Correct 113 ms 212164 KB Output is correct
32 Correct 95 ms 212064 KB Output is correct
33 Correct 94 ms 212108 KB Output is correct
34 Correct 98 ms 212172 KB Output is correct
35 Correct 109 ms 212192 KB Output is correct
36 Correct 101 ms 212140 KB Output is correct
37 Correct 95 ms 212164 KB Output is correct
38 Correct 94 ms 212180 KB Output is correct
39 Correct 95 ms 212080 KB Output is correct
40 Correct 115 ms 212164 KB Output is correct
41 Correct 106 ms 212084 KB Output is correct
42 Correct 93 ms 212180 KB Output is correct
43 Correct 94 ms 212164 KB Output is correct
44 Correct 100 ms 212116 KB Output is correct
45 Correct 113 ms 212084 KB Output is correct
46 Correct 100 ms 212168 KB Output is correct
47 Correct 98 ms 212160 KB Output is correct
48 Correct 96 ms 212132 KB Output is correct
49 Correct 95 ms 212160 KB Output is correct
50 Correct 98 ms 212124 KB Output is correct
51 Correct 103 ms 212192 KB Output is correct
52 Correct 96 ms 212148 KB Output is correct
53 Correct 99 ms 212116 KB Output is correct
54 Correct 115 ms 212128 KB Output is correct
55 Correct 103 ms 221436 KB Output is correct
56 Correct 98 ms 212264 KB Output is correct
57 Correct 106 ms 227928 KB Output is correct
58 Correct 116 ms 231876 KB Output is correct
59 Runtime error 159 ms 262148 KB Execution killed with signal 9
60 Halted 0 ms 0 KB -