oj.uz

답안 #570864

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
570864 2022-05-31T12:51:41 Z duytuandao21 Sure Bet (CEOI17_sure) C++17
0 / 100
 1 ms 212 KB 
#include<bits/stdc++.h>
#define fi first
#define se second
using namespace std;
const int N = 2e6+7;
int n;
double a[N], b[N], prefixSumA[N], prefixSumB[N], res = 0;
int main()
{
	cin>>n;
	for(int i=1;i<=n;i++) cin>>a[i]>>b[i];
	sort(a+1,a+1+n,greater<double>());
	sort(b+1,b+1+n,greater<double>());
	for(int i=1;i<=n;i++) {
		prefixSumA[i] = prefixSumA[i-1] + a[i];
		prefixSumB[i] = prefixSumB[i-1] + b[i];
 
	}
	//for(int i=1;i<=n;i++) cout<<prefixSumA[i]<<" "<<prefixSumB[i]<<'\n';
	for(int i=2;i<=2*n;i++) {
		int l = 0;
		int r = min(i,n);
		double ans = 0;
		while(l <= r) {
			int mid = (l+r)/2;
			double va1 = prefixSumA[mid];
			double va2 = prefixSumB[i-mid];
			res = max(res, min(va1 - i, va2 - i));
			ans = max(ans, min(va1 - i, va2 - i));
			if(va1 - i < va2 - i) l = mid + 1; else r = mid - 1;
		}
		//cout<<ans<<" ";
	}
	printf("%.4lf",(double)res);
	return 0;
}

Subtask #1
0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 212 KB Output is correct
2 Incorrect 1 ms 212 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #2
0 / 40.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 212 KB Output is correct
2 Incorrect 1 ms 212 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #3
0 / 40.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 212 KB Output is correct
2 Incorrect 1 ms 212 KB Output isn't correct
3 Halted 0 ms 0 KB -