oj.uz

Submission #871683

# Submission time Handle Problem Language Result Execution time Memory
871683 2023-11-11T09:48:34 Z vjudge1 Zoo (COCI19_zoo) C++17
110 / 110
 1154 ms 87368 KB 
//author: Ahmet Alp Orakci
#include <bits/stdc++.h>
using namespace std;
using i64 = long long;

char matrix[1005][1005];
int vis[1005 * 1005];
bool viss[1005][1005];
set <int> adj[1005 * 1005];
int comp[1005][1005];

int dx[4] = {0, 1, 0, -1};
int dy[4] = {-1, 0, 1, 0};

#define ONLINE_JUDGE
void solve() {
    memset(vis, -1, sizeof(vis));

    int r, c;
    cin >> r >> c;

    for(int i = 1; i <= r; i++) {
        for(int j = 1; j <= c; j++) {
            cin >> matrix[i][j];
        }
    }

    auto in = [&](int x, int y) -> bool {
        return 1 <= x && x <= r && 1 <= y && y <= c;
    };

    function <void(int, int, int)> dfs = [&](int x, int y, int c) -> void {
        if(viss[x][y]) {
            return;
        }
        viss[x][y] = true;
        comp[x][y] = c;

        for(int i = 0; i < 4; i++) {
            int _x = x + dx[i], _y = y + dy[i];
            if(in(_x, _y) && matrix[_x][_y] == matrix[x][y]) {
                dfs(_x, _y, c);
            }
        }
    };

    int cnt = 0;
    for(int i = 1; i <= r; i++) {
        for(int j = 1; j <= c; j++) {
            if(!viss[i][j] && matrix[i][j] != '*') {
                dfs(i, j, cnt);
                cnt++;
            }
        }
    }

    for(int i = 1; i <= r; i++) {
        for(int j = 1; j <= c; j++) {
            if(i +1 <= r && matrix[i][j] != matrix[i +1][j] && matrix[i][j] != '*' && matrix[i +1][j] != '*') {
                adj[comp[i][j]].emplace(comp[i +1][j]);
            }
            if(j +1 <= c && matrix[i][j] != matrix[i][j +1] && matrix[i][j] != '*' && matrix[i][j +1] != '*') {
                adj[comp[i][j]].emplace(comp[i][j +1]);
            }
            if(i -1 >= 1 && matrix[i][j] != matrix[i -1][j] && matrix[i][j] != '*' && matrix[i -1][j] != '*') {
                adj[comp[i][j]].emplace(comp[i -1][j]);
            }
            if(j -1 >= 1 && matrix[i][j] != matrix[i][j -1] && matrix[i][j] != '*' && matrix[i][j -1] != '*') {
                adj[comp[i][j]].emplace(comp[i][j -1]);
            }
        }
    }

    priority_queue <pair <int, int>, vector <pair <int, int>>, greater <>> q;
    q.emplace(1, 0);
    while(!q.empty()) {
        auto [d, x] = q.top();
        q.pop();
        if(vis[x] != -1) {
            continue;
        }
        cerr << x << " " << d << "\n";
        vis[x] = d;

        for(const int child : adj[x]) {
            if(vis[child] == -1) {
                q.emplace(d +1, child);
            }
        }
    }

    cout << *max_element(vis, vis + 1005 * 1005);
    
    return;
}

signed main() {
    #ifndef ONLINE_JUDGE
        freopen(".in", "r", stdin);
        freopen(".out", "w", stdout);
    #endif

    ios_base::sync_with_stdio(false);
    cin.tie(NULL); cout.tie(NULL);

    int t = 1; //cin >> t;
    for(int i = 1; i <= t; i++) {
        solve();
    }

    return 0;
}

Subtask #1
45.0 / 45.0

# Verdict Execution time Memory Grader output
1 Correct 12 ms 54616 KB Output is correct
2 Correct 12 ms 54620 KB Output is correct
3 Correct 12 ms 54492 KB Output is correct
4 Correct 12 ms 56668 KB Output is correct
5 Correct 13 ms 56924 KB Output is correct
6 Correct 13 ms 56808 KB Output is correct
7 Correct 15 ms 56920 KB Output is correct
8 Correct 20 ms 56924 KB Output is correct
9 Correct 20 ms 57088 KB Output is correct
10 Correct 22 ms 57160 KB Output is correct
11 Correct 20 ms 57032 KB Output is correct
12 Correct 23 ms 56924 KB Output is correct
13 Correct 21 ms 56924 KB Output is correct
14 Correct 21 ms 56920 KB Output is correct
15 Correct 20 ms 56924 KB Output is correct

Subtask #2
65.0 / 65.0

# Verdict Execution time Memory Grader output
1 Correct 12 ms 54616 KB Output is correct
2 Correct 12 ms 54620 KB Output is correct
3 Correct 12 ms 54492 KB Output is correct
4 Correct 12 ms 56668 KB Output is correct
5 Correct 13 ms 56924 KB Output is correct
6 Correct 13 ms 56808 KB Output is correct
7 Correct 15 ms 56920 KB Output is correct
8 Correct 20 ms 56924 KB Output is correct
9 Correct 20 ms 57088 KB Output is correct
10 Correct 22 ms 57160 KB Output is correct
11 Correct 20 ms 57032 KB Output is correct
12 Correct 23 ms 56924 KB Output is correct
13 Correct 21 ms 56924 KB Output is correct
14 Correct 21 ms 56920 KB Output is correct
15 Correct 20 ms 56924 KB Output is correct
16 Correct 38 ms 59484 KB Output is correct
17 Correct 47 ms 59560 KB Output is correct
18 Correct 38 ms 59476 KB Output is correct
19 Correct 46 ms 59740 KB Output is correct
20 Correct 43 ms 59720 KB Output is correct
21 Correct 1102 ms 85800 KB Output is correct
22 Correct 1110 ms 85740 KB Output is correct
23 Correct 1124 ms 86152 KB Output is correct
24 Correct 1139 ms 87368 KB Output is correct
25 Correct 1110 ms 86544 KB Output is correct
26 Correct 1110 ms 86528 KB Output is correct
27 Correct 1092 ms 85744 KB Output is correct
28 Correct 1132 ms 85448 KB Output is correct
29 Correct 1116 ms 87140 KB Output is correct
30 Correct 1154 ms 86608 KB Output is correct