oj.uz

Submission #570813

# Submission time Handle Problem Language Result Execution time Memory
570813 2022-05-31T10:21:56 Z duytuandao21 Sure Bet (CEOI17_sure) C++17
0 / 100
 1 ms 340 KB 
#include<bits/stdc++.h>
#define fi first
#define se second
using namespace std;
const int N = 2e6+7;
int n;
long 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<long double>());
	sort(b+1,b+1+n,greater<long 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<=2*n;i++) {
		/* for(int j=0;j<=i;j++) {
			double va1 = prefixSumA[j];
			double va2 = prefixSumB[i-j];
			res = max(res, min(va1 - i, va2 - i));
		} */
		int l = 0;
		int r = i;
		while(l <= r) {
			int mid = (l+r)/2;
			long double va1 = prefixSumA[mid], va11 = prefixSumB[mid];
			long double va2 = prefixSumB[i-mid], va22 = prefixSumA[i-mid];
			res = max(res, min(va1 - i, va2 - i));
			res = max(res, min(va11 - i, va22 - i));
			if(va1 - i > va2 - i) l = mid + 1; else r = mid - 1;
		}
	}
	printf("%.4lf",(double)res);
	return 0;
}

Subtask #1
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Incorrect 1 ms 340 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #2
0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Incorrect 1 ms 340 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #3
0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Incorrect 1 ms 340 KB Output isn't correct
5 Halted 0 ms 0 KB -