Submission #529022

#	Time	Username	Problem	Language	Result	Execution time	Memory
529022		hmm789	Let's Win the Election (JOI22_ho_t3)	C++14	10 / 100	724 ms	984696 KiB

Main

#include <bits/stdc++.h>
using namespace std;
 
int main() {
	ios_base::sync_with_stdio(0);
	cin.tie(0); cout.tie(0);
	int n, k;
	cin >> n >> k;
	pair<int, int> a[n];
	for(int i = 0; i < n; i++) {
		cin >> a[i].second >> a[i].first;
		if(a[i].first == -1) a[i].first = 1e9;
	}
	sort(a, a+n);
	double dp[n+1][k+1][k+1]; 
	for(int i = 0; i <= n; i++) {
		for(int j = 0; j <= k; j++) {
			for(int m = 0; m <= k; m++) {
				if(m == 0 && i == 0 && j == 0) dp[i][j][m] = 0;
				else if(i == 0 || i < m || i < j || m < j) dp[i][j][m] = 1e9;
				else if(j == 0) dp[i][j][m] = min(dp[i-1][j][m-1] + a[i-1].second*1.0/(j+1), dp[i-1][j][m]);
				else dp[i][j][m] = min(dp[i-1][j][m-1] + a[i-1].second*1.0/(j+1), min(dp[i-1][j-1][m-1] + a[i-1].first*1.0/j, dp[i-1][j][m]));
			}
		}
	}
	double res = 1e9;
	for(int i = 0; i <= k; i++) res = min(res, dp[n][i][k]);
	cout << fixed << setprecision(5) << res;
}

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