Submission #1086660

#	Time	Username	Problem	Language	Result	Execution time	Memory
1086660		Bananabread	Council (JOI23_council)	C++17	16 / 100	104 ms	47988 KiB

council

#include<bits/stdc++.h>
#define ll long long
#define ntr "\n"
#define mod (ll)(1e9+7)
#define taskname "temp"
#define frep freopen("03-05.inp","r",stdin); freopen(taskname".out","w",stdout);
using namespace std;
ll pref[300001];
ll arr[300001][20];
ll ans[300001];
ll cnt[1<<17];
ll best[1<<17];
ll n,m;
ll one,two,zero;
ll super[1<<17];
void sub2(){
    for(int i=1;i<=n;i++){
        for(int j=i+1;j<=n;j++){
            ll cnt=0;
            for(int u=0;u<m;u++){
                ll c=pref[u]-arr[i][u]-arr[j][u];
                if(c>n/2-1) cnt++;
            }
            ans[i]=max(ans[i],cnt);
            ans[j]=max(ans[j],cnt);
        }
    }
    for(int i=1;i<=n;i++){
        cout<<ans[i]<<ntr;
    }
}
int main(){
    ios_base::sync_with_stdio(false); cin.tie(0); cout.tie(0);
    //frep;
    cin>>n>>m;
    for(int i=1;i<=n;i++){
        for(int j=0;j<m;j++){
            cin>>arr[i][j];
            pref[j]+=arr[i][j];
        }
    }
    if(n<=3000){
        sub2();
        return 0;
    }
    for(int i=1;i<=n;i++){
        ll mask=0;
        for(int j=0;j<m;j++){
            mask|(arr[i][j]<<j);
        }
        cnt[mask]++;
    }
    for(int i=0;i<m;i++){
        if(pref[i]>=n/2+2) two|=(1<<i);
        if(pref[i]==n/2+1) one|=(1<<i);
        if(pref[i]==n/2)  zero|=(1<<i);
    }
    for(int i=0;i<(1<<m);i++){
        if(!cnt[i]) continue;
        ll mask=(((1<<m)-1) & ~i);
        for (int nextmask = mask; nextmask ; nextmask=(nextmask-1)&mask){
            super[nextmask]+=cnt[i];
        }
    }
//    for(int i=0;i<(1<<m);i++){
//        cout<<super[i]<<' ';
//    }
//    cout<<ntr;
    for(int mask=0;mask<(1<<m);mask++){
        if(!cnt[mask]) continue;
        cnt[mask]--;
        ll ONE=(two | ( one & ~mask ));
        ll ZERO=( one | ( zero & ~mask ));
        //cout<<ONE<<' '<<ZERO<<ntr;
        for(int nextmask=ZERO ; nextmask ; nextmask=(nextmask-1)&ZERO){
            //cout<<nextmask<<' ';
            if(super[nextmask]>1){
                best[mask]=max(best[mask],(ll)__builtin_popcount(ONE|(ZERO&nextmask)));
            }
        }
        //cout<<ntr;
        best[mask]=max(best[mask],(ll)__builtin_popcount(ONE));
        cnt[mask]++;
    }
    for(int i=1;i<=n;i++){
        ll mask=0;
        for(int j=0;j<m;j++){
            mask+=(arr[i][j]<<j);
        }
        cout<<best[mask]<<ntr;
    }
}

Compilation message (stderr)

council.cpp: In function 'int main()':
council.cpp:49:17: warning: statement has no effect [-Wunused-value]
   49 |             mask|(arr[i][j]<<j);
      |             ~~~~^~~~~~~~~~~~~~~

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