Submission #889799

#	Time	Username	Problem	Language	Result	Execution time	Memory
889799		vjudge1	Council (JOI23_council)	C++17	41 / 100	4045 ms	19880 KiB

council

#include <bits/stdc++.h>
using namespace std;
#define pb push_back

int main(){
	ios_base::sync_with_stdio(0);cin.tie(NULL);cout.tie(NULL);
	int n,m;
	
	cin>>n>>m;
	int arr[n+1][m+1];
	vector<int>vis(m+1),mp((1<<m)),msk((1<<m)),ind(n+1);
	for(int i = 1;i<=n;i++){
		int sum = 0;
		for(int j = 1;j<=m;j++){
			cin>>arr[i][j];
			if(arr[i][j]){
				vis[j]+=1;
				sum += (1<<(j-1));
			}
		}
		ind[i] = sum;
		mp[sum]++;
	}
	if(n<=3000){
		for(int i = 1;i<=n;i++){
			int mx = 0;
			vector<int>vis1(m+1);
			for(int j = 1;j<=m;j++){
				if(arr[i][j])
					vis1[j]++;
			}
			for(int j = 1;j<=n;j++){
				if(j==i)continue;
				vector<int>vis2(m+1);
				int cnt = 0 ;
				for(int k = 1;k<=m;k++){
					if(arr[j][k])vis2[k]++;
				}
				for(int k = 1;k<=m;k++){
					if((vis[k]-vis1[k]-vis2[k])>((n-2)/2))cnt++;
					//cout<<vis[k]-vis1[k]-vis2[k]<<" ";
				}
				//cout<<"\n";
				mx = max(mx,cnt);
			}
			cout<<mx<<"\n";
		}
	}
	else{
		
		int mn = ((n-2)/2);
		for(int i = 1;i<=n;i++){
			int val = ind[i];
			vector<int>gh;
			vector<int>vis1(m+1);

			for(int j = 1;j<=m;j++)
				if(arr[i][j]){
					vis1[j]++;
					if(vis[j] - 1<= mn){
						gh.pb(j - 1);
					}
				}
			int k = gh.size();
			vector<int>use((1<<k));
							
			mp[val]--;
			int mx = 0;
			
			for(int mask = 0;mask<(1<<m);mask++){
				if(mp[mask]<=0||mx==m)continue;
				int sum = 0;
				for(int lr = 0;lr<gh.size();lr++){
					if(((mask>>gh[lr])&1)==1)sum += (1<<lr);
				}
				if(use[sum])continue;
				else use[sum] = 1;
				//------------------
				vector<int>vis2(m+1);
				int cnt = 0;
				for(int j = 0;j<m;j++)
					if(((mask>>j)&1)==1)vis2[j+1]++;
				
				for(int j = 1;j<=m;j++)
					if(vis[j]-vis1[j]-vis2[j]>mn)cnt++;
				mx = max(mx,cnt);
				if(mask==0)break;
			}
			cout<<mx<<"\n";
			
			mp[val]++;
			
		}
		
		
	}








}

Compilation message (stderr)

council.cpp: In function 'int main()':
council.cpp:73:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   73 |     for(int lr = 0;lr<gh.size();lr++){
      |                    ~~^~~~~~~~~~

• 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