Submission #545719

# Submission time Handle Problem Language Result Execution time Memory
545719 2022-04-05T09:22:34 Z Sohsoh84 Sure Bet (CEOI17_sure) C++17
100 / 100
96 ms 18496 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] = round(a * HMM);
		B[i] = round(b * HMM);
	}

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

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

	debug(ans)
	cout << setprecision(4) << fixed << double(ans) / HMM << endl;
	return 0;
}
# Verdict Execution time Memory Grader output
1 Correct 10 ms 15956 KB Output is correct
2 Correct 10 ms 15956 KB Output is correct
3 Correct 10 ms 15984 KB Output is correct
4 Correct 9 ms 15956 KB Output is correct
5 Correct 9 ms 15956 KB Output is correct
6 Correct 10 ms 15960 KB Output is correct
# Verdict Execution time Memory Grader output
1 Correct 10 ms 15956 KB Output is correct
2 Correct 10 ms 15956 KB Output is correct
3 Correct 10 ms 15984 KB Output is correct
4 Correct 9 ms 15956 KB Output is correct
5 Correct 9 ms 15956 KB Output is correct
6 Correct 10 ms 15960 KB Output is correct
7 Correct 10 ms 15920 KB Output is correct
8 Correct 11 ms 15948 KB Output is correct
9 Correct 9 ms 15956 KB Output is correct
10 Correct 10 ms 15956 KB Output is correct
11 Correct 11 ms 15928 KB Output is correct
12 Correct 12 ms 15960 KB Output is correct
13 Correct 11 ms 15956 KB Output is correct
14 Correct 14 ms 15956 KB Output is correct
15 Correct 15 ms 15956 KB Output is correct
16 Correct 10 ms 15956 KB Output is correct
# Verdict Execution time Memory Grader output
1 Correct 10 ms 15956 KB Output is correct
2 Correct 10 ms 15956 KB Output is correct
3 Correct 10 ms 15984 KB Output is correct
4 Correct 9 ms 15956 KB Output is correct
5 Correct 9 ms 15956 KB Output is correct
6 Correct 10 ms 15960 KB Output is correct
7 Correct 10 ms 15920 KB Output is correct
8 Correct 11 ms 15948 KB Output is correct
9 Correct 9 ms 15956 KB Output is correct
10 Correct 10 ms 15956 KB Output is correct
11 Correct 11 ms 15928 KB Output is correct
12 Correct 12 ms 15960 KB Output is correct
13 Correct 11 ms 15956 KB Output is correct
14 Correct 14 ms 15956 KB Output is correct
15 Correct 15 ms 15956 KB Output is correct
16 Correct 10 ms 15956 KB Output is correct
17 Correct 88 ms 18096 KB Output is correct
18 Correct 87 ms 18092 KB Output is correct
19 Correct 91 ms 18044 KB Output is correct
20 Correct 95 ms 18116 KB Output is correct
21 Correct 91 ms 18408 KB Output is correct
22 Correct 86 ms 18036 KB Output is correct
23 Correct 92 ms 18032 KB Output is correct
24 Correct 96 ms 18120 KB Output is correct
25 Correct 87 ms 18100 KB Output is correct
26 Correct 91 ms 18496 KB Output is correct