Submission #678576

#	Time	Username	Problem	Language	Result	Execution time	Memory
678576		flappybird	Sure Bet (CEOI17_sure)	C++17	100 / 100	78 ms	3620 KiB

sure

#include <bits/stdc++.h>
#include <cassert>
#pragma GCC optimize("O3")
#pragma GCC optimize("Ofast")
#pragma GCC optimize("unroll-loops")
#pragma GCC target("avx,avx2,fma")
using namespace std;
typedef long long ll;
typedef pair<ll, ll> pll;
typedef pair<int, int> pii;
#define MAX 101010
#define MAXS 20
#define INF 1000000000000000001
#define bb ' '
#define ln '\n'
#define Ln '\n'
double A[MAX];
double B[MAX];
signed main() {
	ios::sync_with_stdio(false), cin.tie(0);
	int N;
	cin >> N;
	int i;
	double a, b;
	for (i = 1; i <= N; i++) {
		cin >> A[i] >> B[i];
	}
	sort(A + 1, A + N + 1);
	sort(B + 1, B + N + 1);
	double sa, sb;
	int pa, pb;
	pa = pb = N;
	double ans = 0;
	sa = sb = 0;
	for (i = 1; i <= 2 * N; i++) {
		if ((sa < sb && pa) || !pb) {
			sa += A[pa];
			pa--;
		}
		else {
			sb += B[pb];
			pb--;
		}
		ans = max(ans, min(sa, sb) - i);
	}
	cout << fixed;
	cout.precision(4);
	cout << ans << ln;
}

Compilation message (stderr)

sure.cpp: In function 'int main()':
sure.cpp:24:9: warning: unused variable 'a' [-Wunused-variable]
   24 |  double a, b;
      |         ^
sure.cpp:24:12: warning: unused variable 'b' [-Wunused-variable]
   24 |  double a, b;
      |            ^

• Subtask 1: 20 / 20
• Subtask 2: 40 / 40
• Subtask 3: 40 / 40