Submission #966065

#	Time	Username	Problem	Language	Result	Execution time	Memory
966065		Trisanu_Das	Council (JOI23_council)	C++17	Compilation error	0 ms	0 KiB

council

#include <bits/stdc++.h>
using namespace std;
 
int main(){
  ios_base::sync_with_stdio(false); cin.tie(nullptr);
  int n, m; cin >> n >> m;
  int arr[n + 1][m + 1]; 
  vector<int> vis(m + 1), mp(1 << m), mask(1 << m), idx(n + 1);
  for(int i = 1; i <= n; i++){
    int sum = 0;
    for(int j = 1; j <= m; j++){
      cin >> a[i][j];
      if(arr[i][j]){
        vis[j]++;
        sum += (1 << (j - 1));
      }
    }
    idx[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++;
				mx = max(mx, cnt);
			}
			cout << mx << '\n';
		}
	}
	else{
		int mn = ((n - 2) / 2);
		for(int i = 1; i <= n; i++){
			int val = idx[i];
			vector<int> vis1(m + 1);
			for(int j = 1; j <= m;j++) if(arr[i][j]) vis1[j]++;
			mp[val]--;
			int mx = 0;
			for(int msk = 0; msk < (1 << m); msk++){
				if(mp[msk] <= 0 || mx == m) continue;
				vector<int> vis2(m + 1);
				int cnt = 0;
				for(int j = 0; j < m; j++) if(((msk >> 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(msk == 0)break;
			}
			cout << mx << '\n';
			mp[val]++;
		}
	}
}

Compilation message (stderr)

council.cpp: In function 'int main()':
council.cpp:12:14: error: 'a' was not declared in this scope
   12 |       cin >> a[i][j];
      |              ^