oj.uz

Submission #545717

# Submission time Handle Problem Language Result Execution time Memory
545717 2022-04-05T09:15:19 Z Sohsoh84 Sure Bet (CEOI17_sure) C++17
0 / 100
 13 ms 15956 KB 
#include <bits/stdc++.h>

using namespace std;

typedef long long ll;
typedef pair<ll, ll> pll;

#define all(x)			(x).begin(),(x).end()
#define X			first
#define Y			second
#define sep			' '
#define endl			'\n'
#define debug(x)		cerr << #x << ": " <<  x << endl;

const ll MAXN = 1e6 + 10;
const ll HMM = 1e4;

int n;
ll A[MAXN], B[MAXN], ans, ps[MAXN];

inline void f() {
	for (int i = 1; i <= n; i++)
		ps[i] = ps[i - 1] + B[i];

	ll s = 0;
	for (int i = 1; i <= n; i++) {
		s += A[i];
		if (s > ps[n]) break;

		int ind = lower_bound(ps, ps + n + 1, s) - ps;
		ans = max(ans, s - HMM * (ind + i));
		assert(ps[ind] >= s);
	}
}

int main() {
	ios_base::sync_with_stdio(false); cin.tie(0); cout.tie(0);
	cin >> n;
	for (int i = 1; i <= n; i++) {
		double a, b;
		cin >> a >> b;
		A[i] = a * HMM;
		B[i] = b * HMM;
	}

	sort(A + 1, A + n + 1, greater<ll>());
	sort(B + 1, B + n + 1, greater<ll>());

	f();
	swap(A, B);
	f();

	cout << setprecision(4) << fixed << double(ans) / HMM << endl;
	return 0;
}

Subtask #1
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 10 ms 15920 KB Output is correct
2 Correct 10 ms 15940 KB Output is correct
3 Correct 11 ms 15920 KB Output is correct
4 Correct 11 ms 15956 KB Output is correct
5 Correct 10 ms 15952 KB Output is correct
6 Incorrect 13 ms 15956 KB Output isn't correct
7 Halted 0 ms 0 KB -

Subtask #2
0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 10 ms 15920 KB Output is correct
2 Correct 10 ms 15940 KB Output is correct
3 Correct 11 ms 15920 KB Output is correct
4 Correct 11 ms 15956 KB Output is correct
5 Correct 10 ms 15952 KB Output is correct
6 Incorrect 13 ms 15956 KB Output isn't correct
7 Halted 0 ms 0 KB -

Subtask #3
0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 10 ms 15920 KB Output is correct
2 Correct 10 ms 15940 KB Output is correct
3 Correct 11 ms 15920 KB Output is correct
4 Correct 11 ms 15956 KB Output is correct
5 Correct 10 ms 15952 KB Output is correct
6 Incorrect 13 ms 15956 KB Output isn't correct
7 Halted 0 ms 0 KB -