Submission #13971

#	Time	Username	Problem	Language	Result	Execution time	Memory
13971		kriii	Be Two Bees (OJUZ10_b2b)	C++14	11 / 100	1000 ms	4212 KiB

b2b

#include <stdio.h>
#include <algorithm>
using namespace std;

int N,H[100100],T[100100],S;

struct p{
	p(){
		a = b = i = 0;
	}
	p(double a_, long long b_, int i_){
		a = a_; b = b_; i = i_;
	}
	double a; long long b; int i;

	bool operator <(const p t) const{
		return a * t.b > b * t.a;
	}
}P[100100];

bool go(double m)
{
	for (int i=0;i<N;i++){
		P[i] = p(m+T[i]*H[i],T[i],i+1);
	}
	sort(P,P+N);
	return p(P[0].a*P[1].b+P[1].a*P[0].b,P[0].b*P[1].b,0) < p(S,1,0);
}

int main()
{
	scanf ("%d",&N);
	for (int i=0;i<N;i++){
		scanf ("%d",&H[i]); S += H[i];
	}
	for (int j=0;j<N;j++) scanf ("%d",&T[j]);

	double l = 0, r = 1e9, m;
	for (int i=0;i<70;i++){
		m = (l + r) / 2;
		if (go(m)) r = m;
		else l = m;
	}
	go(l);

	int a = P[0].i, b = P[1].i;
	if (a > b) swap(a,b);
	printf ("%d %d\n",a,b);

	return 0;
}

• Subtask 1: 11 / 11
• Subtask 2: 0 / 22
• Subtask 3: 0 / 28
• Subtask 4: 0 / 39