Submission #837687

#	Time	Username	Problem	Language	Result	Execution time	Memory
837687		Xiaoyang	Balloons (CEOI11_bal)	C++17	10 / 100	2060 ms	10792 KiB

bal

#include<bits/stdc++.h>
using namespace std;
 
typedef long long ll;
 
#define fi first
#define se second
#define pii pair<int,int>
#define pll pair<long long,long long>
#define pb push_back
#define debug(x) cerr<<#x<<"="<<x<<endl
#define pq priority_queue
#define inf 1ll<<60
#define rep(i,a,b) for (int i=a;i<(b);i++)
#define MP make_pair
#define SZ(x) (int(x.size()))
#define mod 1000000007
#define ALL(x) x.begin(),x.end()
#define endl "\n"
void inc(ll &a,ll b) {a=(a+b)%mod;}
void dec(ll &a,ll b) {a=(a-b+mod)%mod;}
int lowbit(ll x) {return x&(-x);}
 
 
vector<pair<ll,long double>>alist;
long double calc(ll a,ll b){
	long double d=alist[a].fi-alist[b].fi;
	long double r=d*d/(4*alist[a].se);
	return min(r,alist[b].se);
}
int main() {
	ios::sync_with_stdio(0);
	cin.tie(0);
	ll n;cin>>n;
	cout<<fixed<<" "<<setprecision(3);
	rep(i,0,n){
		ll x;cin>>x;
		long double r;cin>>r;
		if(i==0){
			cout<<r<<endl;
		}
		alist.pb(MP(x,r));
	}
	sort(ALL(alist));
	rep(i,1,n){
		long double r=inf;
		for(ll j=i-1;j>=0;j--){
			r=min(r,calc(j,i));
		}
		cout<<r<<endl;
	}
	return 0;
}

• Subtask 1: 0 / 10
• Subtask 2: 10 / 10
• Subtask 3: 0 / 10
• Subtask 4: 0 / 10
• Subtask 5: 0 / 10
• Subtask 6: 0 / 10
• Subtask 7: 0 / 10
• Subtask 8: 0 / 10
• Subtask 9: 0 / 10
• Subtask 10: 0 / 10