Submission #431942

#	Time	Username	Problem	Language	Result	Execution time	Memory
431942		Dakto	Game (eJOI20_game)	C++17	20 / 100	1 ms	292 KiB

game

#include <bits/stdc++.h>

using namespace std;

int main(){
    int n,m;
    cin>>n>>m;

    vector<vector<int>> g(n*m);
    vector<int> cnt(n*m);

    for(int i=0; i<=n; i++){
        string s;
        cin>>s;
        if(i==0 || i==n){
            for(int j=0; j<m; j++){
                if(s[j]=='0') cnt[(i==0?0:n-1)*m+j]++;
            }
        }
        else{
            for(int j=0; j<m; j++){
                if(s[j]=='0'){
                    g[(i-1)*m+j].push_back(i*m+j);
                    g[i*m+j].push_back((i-1)*m+j);
                } 
            }
        }
    }

    for(int i=0; i<n; i++){
        string s;
        cin>>s;
        for(int j=1; j<n; j++){
            if(s[j]=='0'){
                g[i*m+j].push_back(i*m+j-1);
                g[i*m+j-1].push_back(i*m+j);
            }
        }
    }

    vector<bool> seen(n*m,0);

    vector<int> comp;

    for(int i=0; i<n*m; i++){
        if(!seen[i] && (g[i].size() || cnt[i])){
            int sz=0;

            queue<int> q;
            q.push(i);

            while(!q.empty()){
                auto t=q.front();
                q.pop();
                if(seen[t]) continue;
                sz++;
                seen[t]=1;
                for(int j:g[t]) if(!seen[j]) q.push(j);
            }


            comp.push_back(sz);
        }
    }

    sort(comp.begin(),comp.end());

    int res=0;

    int p=-1;

    for(int i:comp){
        res+=p*i;
        p*=-1;
    }
    cout<<res<<endl;
}

• Subtask 1: 20 / 20
• Subtask 2: 0 / 20
• Subtask 3: 0 / 20
• Subtask 4: 0 / 20
• Subtask 5: 0 / 20