oj.uz

Submission #1107976

# Submission time Handle Problem Language Result Execution time Memory
1107976 2024-11-02T13:46:11 Z 0pt1mus23 Tracks in the Snow (BOI13_tracks) C++14
14.2708 / 100
 2000 ms 929608 KB 
#include <bits/stdc++.h>
using namespace std;
#define int long long int
#define ins insert      
#define pb push_back
#define endl '\n'
#define putr(x) cout<<x<<endl;return; 
#define all(x) x.begin(),x.end()
const int mod = 1e9 +7, sze = 4005, inf = INT_MAX, LL = 30;
 

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

int comp[sze][sze];
map<pair<int,int>,int> var;
vector<int> graph[sze*sze];
int used[sze*sze];
void rush(){
    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]=0;
            cin>>arr[i][j];
        }
    }
    int x,y;
    int c=1,a,b;
    for(int i=0;i<n;i++){
        for(int j=0;j<m;j++){
            if(arr[i][j]!='.'){
                if(!comp[i][j]){
                    comp[i][j]= (c++);
                }
                for(int k=0;k<4;k++){
                    x= i + dx[k];
                    y = j + dy[k];
                    if( x>=0 && y>=0 && x<n && y<m){
                        if(arr[i][j] == arr[x][y]){
                            comp[x][y]=comp[i][j];
                        }
                        else{
                            if(arr[x][y]!='.' && comp[x][y]){
                                a = comp[x][y];
                                b = comp[i][j];
                                if(!var[make_pair(min(a,b),max(a,b))]){
                                    var[make_pair(min(a,b),max(a,b))]=1;
                                    graph[a].pb(b);
                                    graph[b].pb(a);
                                }
                            }
                        }
                    }
                }
            }
        }
    }



    int ans=1;
    queue< pair<int,int>> q;
    q.push({1,1});
    while(!q.empty()){
        pair<int,int> node =q.front();
        q.pop();
        if(!used[node.first]){
            ans=max(ans,node.second);
            used[node.first]=1;
            for(auto v:graph[node.first]){
                if(!used[v]){
                    q.push({v,node.second+1});
                }
            }
        }
    }
    putr(ans);
}
 
signed main(){
    ios::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
 
    int tt = 1; 
    // cin>>tt;
 
    while(tt--){
        rush();
    }
 
    return 0;
}

Subtask #1
3.33333333333 / 30.0

# Verdict Execution time Memory Grader output
1 Incorrect 159 ms 392692 KB Output isn't correct
2 Correct 86 ms 378012 KB Output is correct
3 Incorrect 97 ms 378184 KB Output isn't correct
4 Incorrect 116 ms 382160 KB Output isn't correct
5 Incorrect 109 ms 380756 KB Output isn't correct
6 Correct 115 ms 377808 KB Output is correct
7 Incorrect 121 ms 378184 KB Output isn't correct
8 Incorrect 119 ms 378076 KB Output isn't correct
9 Incorrect 114 ms 378440 KB Output isn't correct
10 Incorrect 134 ms 380488 KB Output isn't correct
11 Incorrect 141 ms 379208 KB Output isn't correct
12 Incorrect 147 ms 383560 KB Output isn't correct
13 Incorrect 130 ms 380728 KB Output isn't correct
14 Incorrect 127 ms 380648 KB Output isn't correct
15 Incorrect 164 ms 390472 KB Output isn't correct
16 Incorrect 188 ms 392776 KB Output isn't correct
17 Incorrect 136 ms 387220 KB Output isn't correct
18 Incorrect 113 ms 382280 KB Output isn't correct

Subtask #2
10.9375 / 70.0

# Verdict Execution time Memory Grader output
1 Incorrect 120 ms 394312 KB Output isn't correct
2 Incorrect 277 ms 426800 KB Output isn't correct
3 Incorrect 1060 ms 695968 KB Output isn't correct
4 Incorrect 326 ms 448072 KB Output isn't correct
5 Correct 1708 ms 929608 KB Output is correct
6 Incorrect 1634 ms 668212 KB Output isn't correct
7 Incorrect 157 ms 395080 KB Output isn't correct
8 Incorrect 157 ms 394316 KB Output isn't correct
9 Incorrect 157 ms 379220 KB Output isn't correct
10 Correct 151 ms 378184 KB Output is correct
11 Incorrect 159 ms 394580 KB Output isn't correct
12 Correct 156 ms 379720 KB Output is correct
13 Incorrect 313 ms 426808 KB Output isn't correct
14 Incorrect 232 ms 406880 KB Output isn't correct
15 Incorrect 213 ms 405064 KB Output isn't correct
16 Incorrect 267 ms 401480 KB Output isn't correct
17 Incorrect 581 ms 497480 KB Output isn't correct
18 Incorrect 426 ms 477000 KB Output isn't correct
19 Incorrect 390 ms 448172 KB Output isn't correct
20 Incorrect 393 ms 456264 KB Output isn't correct
21 Incorrect 759 ms 578868 KB Output isn't correct
22 Correct 1686 ms 926640 KB Output is correct
23 Incorrect 966 ms 605176 KB Output isn't correct
24 Incorrect 727 ms 610548 KB Output isn't correct
25 Incorrect 1272 ms 732500 KB Output isn't correct
26 Correct 449 ms 498964 KB Output is correct
27 Incorrect 549 ms 520776 KB Output isn't correct
28 Incorrect 1542 ms 668168 KB Output isn't correct
29 Incorrect 1378 ms 616756 KB Output isn't correct
30 Incorrect 1077 ms 583364 KB Output isn't correct
31 Execution timed out 2082 ms 821872 KB Time limit exceeded
32 Incorrect 596 ms 538180 KB Output isn't correct