Submission #1263838

#	Time	Username	Problem	Language	Result	Execution time	Memory
1263838		goulthen	Let's Win the Election (JOI22_ho_t3)	C++20	11 / 100	2595 ms	328 KiB

Main

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

#define int long long
#define rep(i,a,b) for (int i = a; i <= b; ++i)
#define pii pair<int,int>
#define fi first
#define se second
#define pb push_back
#define all(v) (v).begin(), (v).end()

const int MAXN = 510;
pii a[MAXN];
bool mk[MAXN];

int32_t main() {
	ios_base::sync_with_stdio(0); cin.tie(nullptr);

	int n,k; cin >> n >> k;
	rep(i,1,n) cin >> a[i].fi >> a[i].se;
	double ans = 1e9;
	sort(a+1,a+n+1);
	do {
		rep(j,0,k) {
			double cur = 0;
			int cnt = 1;
			bool ok = 1;
			rep(i,1,j) {
				if (a[i].se == -1) {
					ok = 0;
					break;
				}
				cur += (double)a[i].se/cnt;
				cnt++;
			}
			if (!ok) break;

			rep(i,j+1,k) {
				cur += (double)a[i].fi/cnt;
			}

			ans = min(cur,ans);
		}
	}while(next_permutation(a+1,a+n+1));

	cout << fixed << setprecision(15) << ans << '\n';
}

• Subtask 1: 0 / 5
• Subtask 2: 0 / 5
• Subtask 3: 11 / 11
• Subtask 4: 0 / 12
• Subtask 5: 0 / 33
• Subtask 6: 0 / 11
• Subtask 7: 0 / 23