Submission #638805

#	Time	Username	Problem	Language	Result	Execution time	Memory
638805		penguin133	Let's Win the Election (JOI22_ho_t3)	C++14	0 / 100	646 ms	56260 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){
	return a.se < b.se;
}
vector<long double> v;
vector<pair<long double, long double> > v2;
long double dp[105][105][105];
void solve(){
	cin >> n >> k;
	for(int i=1;i<=n;i++){
		long double x, y; cin >> x >> y;
		if(y == -1)v.push_back(x);
		else v2.push_back({x, y});
	}
	sort(v2.begin(), v2.end(), cmp);
	for(int i=1;i<=v2.size();i++)A[i] = v2[i-1];
	for(int i=0;i<v.size();i++)A[i+v2.size()+1] = {v[i], -1};
	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++){
			long double bruh = 1e18;
			for(int x=0;x<=n;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/(x+1));
				bruh = min(bruh, dp[i][j][x]);
			}
		}
	}
	long double ans = 1e18;
	for(int i=0;i<=n;i++)ans=  min(ans, dp[n][k][i]);
	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: In function 'void solve()':
Main.cpp:24:15: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<std::pair<long double, long double> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   24 |  for(int i=1;i<=v2.size();i++)A[i] = v2[i-1];
      |              ~^~~~~~~~~~~
Main.cpp:25:15: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long double>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   25 |  for(int i=0;i<v.size();i++)A[i+v2.size()+1] = {v[i], -1};
      |              ~^~~~~~~~~
Main.cpp: At global scope:
Main.cpp:49:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   49 | main(){
      | ^~~~

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