Submission #638817

#	Time	Username	Problem	Language	Result	Execution time	Memory
638817		penguin133	Let's Win the Election (JOI22_ho_t3)	C++14	61 / 100	2615 ms	414304 KiB

Main

#include <bits/stdc++.h>
using namespace std;
#define int long long
#define pi pair<int, int>
#define pii pair<int, pair<int, int> > 
#define fi first
#define se second
int n,k;
pair<long double, long double> A[300005];
bool cmp(pair<long double, long double> a, pair<long double, long double> b){
	if(a.se == -1)return 0;
	if(b.se == -1)return 1;
	return a.se < b.se;
}
long double dp[505][505][105];
void solve(){
	cin >> n >> k;
	int cnt = 0;
	for(int i=1;i<=n;i++)cin >> A[i].fi >> A[i].se, cnt += (A[i].se != -1);
	sort(A+1, A+n+1, cmp);
	long double ans = 1e18;
	for(int y=0;y<=cnt;y++){
		for(int i=1;i<=k;i++){
			for(int j=0;j<=n;j++){
				dp[0][i][j] = 1e18;
				if(j)dp[0][0][j] = 1e18;
			}
		}
		dp[0][0][0] = 0.0;
		for(int i=1;i<=n;i++){
			for(int j=0;j<=k;j++){
				for(int x=0;x<=y;x++){
					dp[i][j][x] = dp[i-1][j][x];
					if(j && x && A[i].se > 0)dp[i][j][x] = min(dp[i][j][x], dp[i-1][j-1][x-1] + A[i].se/x);
					if(j)dp[i][j][x] = min(dp[i][j][x], dp[i-1][j-1][x] + A[i].fi/(y+1));
				}
			}
		}
		ans = min(ans, dp[n][k][y]);
	}
	
	
	
	cout << fixed << setprecision(12) << ans;
}
 
main(){
	ios::sync_with_stdio(0);cin.tie(0);
	int t = 1;
	//cin >> t;
	while(t--){
		solve();
	}
}

Compilation message (stderr)

Main.cpp:47:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   47 | main(){
      | ^~~~

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