Submission #842764

#	Time	Username	Problem	Language	Result	Execution time	Memory
842764		vjudge1	Sure Bet (CEOI17_sure)	C++17	100 / 100	60 ms	6980 KiB

sure

#include<bits/stdc++.h>
using namespace std;
#pragma GCC optimize("O3")
#pragma GCC optimize("unroll-loops")
#define fi first
#define se second
#define int long long
#define pii pair<int,int>
#define piii pair<int, pair<int, int>>
#define v(int) vector<int>
#define si size()
#define foe(i,a,b) for(int i=a;i<=b;++i)
#define fol(i,a,b) for(int i=a;i<b;++i)
#define pb push_back
#define Bit(mask,i) (1<<i)&mask
#define offBit(mask,i) (1<<i)^mask
#define onBit(mask,i) (1<<i)mask
#define CNT(x) __builtin_popcountll(x)
const int mod = 1e9+7;
const int base = 2309;
const int inf = 1e18;
const int N = 1e6+10;
const int LG = 20;
// ▄  ▄ ▄  ▄ ▄  ▄ ▄  ▄ ▄  ▄ ▄▄ ▄ ▄▄▄▄
// █▄▄█ █  █ █  █ █▄▄█ █  █ ██ █ █ ▄▄
// █  █ █▄▄█ █▄▄█ █  █ █▄▄█ █ ██ █▄▄█

int n;
double a[N], b[N];
double ans, A, B;
signed main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    cout.tie(0);
    cin >> n;
    foe(i,1,n)
    {
        cin >> a[i] >> b[i];
    }
    sort(a + 1, a + n + 1, greater<double>());
    sort(b + 1, b + n + 1, greater<double>());
    int l = 1, r = 1;
    while(l < n + 1 || r < n + 1)
    {
        if((A < B && l < n + 1) || r == n + 1)
            A += a[l++];
        else
            B += b[r++];
        A --;
        B --;
        ans = max(ans, min(A, B));
    }
    cout << fixed << setprecision(4) << ans << "\n";
    cerr << "\n" << (double)clock() / CLOCKS_PER_SEC * 1000 << " ms";
    return 0;
}

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