Submission #1152855

#	Time	Username	Problem	Language	Result	Execution time	Memory
1152855		arsen23	Sure Bet (CEOI17_sure)	C++20	100 / 100	102 ms	11416 KiB

sure

#include <bits/stdc++.h>
#define all(v) v.begin(), v.end()
#define pb push_back
#define F first
#define S second
#define in insert

using namespace std;
typedef long long ll;

typedef unsigned long long ull;

const int N = 1e6 + 123;

const int P = 320;

const int mod = 1e9 + 7;

ll n, m, k;

double a[N], b[N];

ll sum[N];

double pref[N];

multiset <double> st1;

multiset <double> st2;

void salemkhan() {
	cin >> n;
	
	for(int i = 1; i <= n; i++) {
		cin >> a[i] >> b[i];
	
		st1.insert(a[i]);
		
		st2.insert(b[i]);
	}	
		
	double ans = 0;
	
	double sum1 = 0;
	
	double sum2 = 0;
	
	ll l = 1;
	
	while(l <= n * 2) {
		if(sum2 > sum1) {
			if(st1.size() == 0) break;
			
			auto it1 = *st1.rbegin();

			
			sum1 += it1;
				
			st1.erase(st1.find(it1));
		}
		
		else {
			if(st2.size() == 0) break;
			
			
			auto it2 = *st2.rbegin();
			
			sum2 += it2;
			
			st2.erase(st2.find(it2));
		}
		
		double p1 = sum1;
		
		double p2 = sum2;
		
		if(p1 > p2) swap(p1, p2);
		
		if(ans < p1 - l) {
			ans = p1 - l;
		}
		
		l++;
	}
	
	cout << fixed;
	
	cout.precision(4);
	
	cout << ans << '\n';
}

// 28 37 48 49 55 56 57 58 67 9

// 9 + 1 +

int main() {

    //freopen("knight.in",   "r", stdin);

    //freopen("knight.out", "w", stdout);

    ios_base::sync_with_stdio(0);

    cin.tie(0);

    cout.tie(0);

    ll tt = 1;

    //cin >> tt;

    while(tt--) {
        salemkhan();
    }
}

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