Submission #889781

#	Time	Username	Problem	Language	Result	Execution time	Memory
889781		vjudge1	Council (JOI23_council)	C++17	41 / 100	4089 ms	37620 KiB

council

#include <bits/stdc++.h>
#define int long long
#define all(x) x.begin(),x.end()
#define ff first
#define ss second
#define pb push_back
using namespace std;
signed main(){
    ios_base::sync_with_stdio();
    cin.tie(0);
    int n,m;
    cin>>n>>m;
    int a[n][m];
    vector <int> mp((1<<m));
    vector <int> v;
    for(int i=0;i<n;i++){
        int x=0;
        for(int j=0;j<m;j++){
            cin>>a[i][j];
            if(a[i][j]==1)x+=(1<<j);
        }
        v.pb(x);
        mp[x]++;
    }
    vector <int> cnt,cnt2((1<<m));
    for(int i=0;i<m;i++){
        int kol=0;
        for(int j=0;j<n;j++){
            if(a[j][i]==1)kol++;
        }
        cnt.pb(kol);
    }
    for(int i=0;i<(1<<m);i++){
        for(int j=0;j<m;j++){
            if((i & (1<<j))!=0)cnt2[i]++;
        }
    }
    if(n<=3000){
        for(int i=0;i<n;i++){
            for(int k=0;k<m;k++){
                if(a[i][k]==1)cnt[k]--;
            }
            int mx=0;
            for(int j=0;j<n;j++){
                if(i!=j){
                    int kol=0;
                    for(int k=0;k<m;k++){
                        if(a[j][k]==1)cnt[k]--;
                    }
                    for(int k=0;k<m;k++){
                        if(cnt[k]>=n/2)kol++;
                    }
                    for(int k=0;k<m;k++){
                        if(a[j][k]==1)cnt[k]++;
                    }
                    mx=max(mx,kol);
                }
            }
            cout<<mx<<"\n";
            for(int k=0;k<m;k++){
                if(a[i][k]==1)cnt[k]++;
            }
        }
        return 0;
    }
    for(int i=0;i<n;i++){
        int mx=0,kol=0,min=0;
        mp[v[i]]--;
        for(int j=0;j<m;j++){
            if(a[i][j]==1)cnt[j]--;
            if(cnt[j]>=n/2)kol++;
            if(cnt[j]==n/2)min+=(1<<j);
            
        }
        for(int j=0;j<(1<<m);j++){
            int x=j&min;
            if(mp[j]!=0)mx=max(mx,kol-cnt2[x]);
        }
        mp[v[i]]++;
        for(int j=0;j<m;j++){
            if(a[i][j]==1)cnt[j]++;
        }
        cout<<mx<<"\n";
    }
    
}

• Subtask 1: 8 / 8
• Subtask 2: 8 / 8
• Subtask 3: 6 / 6
• Subtask 4: 19 / 19
• Subtask 5: 0 / 15
• Subtask 6: 0 / 22
• Subtask 7: 0 / 22