oj.uz

Submission #1026217

# Submission time Handle Problem Language Result Execution time Memory
1026217 2024-07-17T17:45:38 Z 0pt1mus23 Zoo (COCI19_zoo) C++14
110 / 110
 277 ms 61780 KB 
#pragma GCC optimize("O3", "inline")
#define skillissue <bits/stdc++.h>
#define ultra_mal std

#include skillissue
using namespace ultra_mal;
mt19937_64 rng(chrono::steady_clock::now().time_since_epoch().count());


#define ins insert
#define pb push_back
#define int long long int
#define pii pair<int, int>
#define endl '\n'
#define drop(x) cout<<(x)<<endl; return;
#define all(x) x.begin(),x.end()
#define hash FhashF
const int mod = 1e9 +7, sze = 1E3 +100, inf = LLONG_MAX, P = 1453;
// const int L = 30;

int comp[1100][1100];
const int dx[4] = {-1,1,0,0};
const int dy[4] = {0,0,-1,1};
void cave(){
    int n,m;
    cin>>n>>m;

    vector<vector<char>> arr(n,vector<char>(m));
    for(int i=0;i<n;i++){
        for(int j=0;j<m;j++){
            comp[i][j]=-1;
            cin>>arr[i][j];
        }
    }

    int ct = 0;
    for(int i=0;i<n;i++){
        for(int j=0;j<m;j++){
            if(arr[i][j]!='*' && comp[i][j]==-1){
                queue<pair<int,int>> q;
                q.push({i,j});
                comp[i][j]=ct;
                while(!q.empty()){

                    pii node = q.front();q.pop();
                    // cout<<node.first<<" "<<node.second<<endl;

                    for(int x=0;x<4;x++){
                        int a = node.first + dx[x];
                        int b =  node.second + dy[x];
                        if(a>=0 && a<n && b>=0 && b<m && comp[a][b]==-1 && arr[a][b]==arr[i][j]){
                            comp[a][b]=ct;
                            q.push({a,b});
                            // cout<<node.first<<" "<<node.second <<" _>"<<a<<" "<<b<<endl;
                        }
                    }

                }
                ct++;
            }

        }
    }

    set<pair<int,int>> edge;

    vector<int> graph[ct];
    for(int i =0;i<n;i++){
        for(int j=0;j<m;j++){
            if(comp[i][j]!=-1){

                for(int x= 0; x<4;x++){
                    int a = i + dx[x];
                    int b = j + dy[x];
                    if(a>=0 && a<n && b>=0 && b<m && comp[a][b] !=-1 && comp[a][b]!=comp[i][j]){
                        if(edge.find({comp[i][j],comp[a][b]})==edge.end()){
                            edge.insert({comp[i][j],comp[a][b]});
                            graph[comp[i][j]].pb(comp[a][b]);
                        }
                    }
                }

            }
        }
    }
    int ans=0;
    queue<pii> q;
    vector<int> used(ct,0);
    q.push({0,1});
    used[0]=1;
    while(!q.empty()){
        auto node = q.front();
        ans=max(ans,node.second);
        q.pop();
        for(auto v:graph[node.first]){
        if(!used[v]){
                used[v]=1;
                q.push({v,node.second+1});
            }
        }
    }
    drop(ans);
}

signed main() {
    cin.tie(0)->sync_with_stdio(0);
    int tt = 1;
    // cin>>tt;
    
    while(tt--){
        cave();
    }

    return 0;
}

Subtask #1
45.0 / 45.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 2396 KB Output is correct
4 Correct 1 ms 2396 KB Output is correct
5 Correct 1 ms 2652 KB Output is correct
6 Correct 1 ms 2652 KB Output is correct
7 Correct 1 ms 2652 KB Output is correct
8 Correct 2 ms 2908 KB Output is correct
9 Correct 2 ms 2908 KB Output is correct
10 Correct 2 ms 2908 KB Output is correct
11 Correct 2 ms 2908 KB Output is correct
12 Correct 2 ms 2908 KB Output is correct
13 Correct 2 ms 2908 KB Output is correct
14 Correct 2 ms 2852 KB Output is correct
15 Correct 2 ms 2908 KB Output is correct

Subtask #2
65.0 / 65.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 2396 KB Output is correct
4 Correct 1 ms 2396 KB Output is correct
5 Correct 1 ms 2652 KB Output is correct
6 Correct 1 ms 2652 KB Output is correct
7 Correct 1 ms 2652 KB Output is correct
8 Correct 2 ms 2908 KB Output is correct
9 Correct 2 ms 2908 KB Output is correct
10 Correct 2 ms 2908 KB Output is correct
11 Correct 2 ms 2908 KB Output is correct
12 Correct 2 ms 2908 KB Output is correct
13 Correct 2 ms 2908 KB Output is correct
14 Correct 2 ms 2852 KB Output is correct
15 Correct 2 ms 2908 KB Output is correct
16 Correct 16 ms 11100 KB Output is correct
17 Correct 17 ms 11100 KB Output is correct
18 Correct 17 ms 11268 KB Output is correct
19 Correct 20 ms 11312 KB Output is correct
20 Correct 18 ms 11016 KB Output is correct
21 Correct 268 ms 59220 KB Output is correct
22 Correct 252 ms 58824 KB Output is correct
23 Correct 273 ms 59220 KB Output is correct
24 Correct 277 ms 61780 KB Output is correct
25 Correct 267 ms 60676 KB Output is correct
26 Correct 262 ms 59988 KB Output is correct
27 Correct 244 ms 58816 KB Output is correct
28 Correct 260 ms 58452 KB Output is correct
29 Correct 272 ms 61368 KB Output is correct
30 Correct 265 ms 60756 KB Output is correct