Submission #920239

#	Time	Username	Problem	Language	Result	Execution time	Memory
920239		OAleksa	Council (JOI23_council)	C++14	78 / 100	4021 ms	56972 KiB

council

#include <bits/stdc++.h>
using namespace std;
#define int long long
#define f first
#define s second
const int N = 3e5 + 69;
const int M = 21;
int a[N], cnt[M], n, m;
int t[M], k, gas, pr, suf, bt, b, ans, c, s;
pair<pair<int, int>, pair<int, int>> bst[1030][1030];
int kurac[1030][1030];
signed main() {
  ios::sync_with_stdio(false);
  cin.tie(0);
  cout.tie(0);
  int tt = 1;
  //cin >> tt;
  while (tt--) {
  	cin >> n >> m;
  	for (int i = 1;i <= n;i++) {
  		for (int j = 0;j < m;j++) {
  			int x;
  			cin >> x;
  			if (x > 0) {
  				a[i] += (1 << j);
  				cnt[j]++;
  			}
  		}
  	}
  	int k = (m + 1) / 2;
  	for (int i = 0;i < (1 << k);i++) {
  		for (int j = 0;j < (1 << k);j++) {
  			kurac[i][j] = __builtin_popcount(i & j);
  			bst[i][j] = {{(1 << m) - 1, m + 1}, {(1 << m) - 1, m + 1}};
  		}
  	}
  	for (int j = 1;j <= n;j++) {
  		pr = (a[j] & ((1 << (m - k)) - 1));
  		gas = (a[j] >> (m - k));
  		for (int i = 0;i < (1 << k);i++) {
  			bt = kurac[gas][i];
  			if (bt < bst[pr][i].f.s) {
  				bst[pr][i].s = bst[pr][i].f;
  				bst[pr][i].f = {a[j], bt};
  			}
  			else if (bt < bst[pr][i].s.s)
  				bst[pr][i].s = {a[j], bt};
  		}
  	}
  	//sufix duzine k, prefix duzine m - k
  	for (int i = 1;i <= n;i++) {
  		b = ans = c = 0;
  		for (int j = 0;j < m;j++) {
  			gas = cnt[j] - ((a[i] & (1 << j)) > 0);
  			if (gas == n / 2) {
  				b += (1 << j);
  				c++;
  			}
  			else if (gas > n / 2)
  				ans++;
  		}
  		suf = (b >> (m - k)), s = c;
  		pr = (b & ((1 << (m - k)) - 1));
  		for (int j = 0;j < (1 << (m - k));j++) {
  			if (a[i] != bst[j][suf].f.f) 
  				s = min(s, bst[j][suf].f.s + kurac[pr][j]);
  			else 
  				s = min(s, bst[j][suf].s.s + kurac[pr][j]);
  		}
  		ans += c - s;
  		cout << ans << '\n';
  	}
  }
  return 0;
}

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