Submission #503394

#	Time	Username	Problem	Language	Result	Execution time	Memory
503394		Lobo	Sure Bet (CEOI17_sure)	C++17	100 / 100	98 ms	5388 KiB

sure

#include<bits/stdc++.h>
using namespace std;

const long long inf = (long long) 1e18 + 10;
const int inf1 = (int) 1e9 + 10;
#define int long long
#define dbl long double
#define endl '\n'
#define sc second
#define fr first
#define mp make_pair
#define pb push_back
#define all(x) x.begin(), x.end()

#define maxn 


void solve() {
    int n;
    cin >> n;

    vector<dbl> a,b;

    for(int i = 1; i <= n; i++) {
        dbl a1, b1;
        cin >> a1 >> b1;
        a.pb(a1);
        b.pb(b1);
    }

    sort(all(a),greater<dbl>());
    sort(all(b),greater<dbl>());

    int pa = 0;
    dbl sa = 0;
    int pb = 0;
    dbl sb = 0;

    dbl ans = 0;
    while(pa != n || pb != n) {
        if(pa == n) {
            sb+= b[pb];
            pb++;
        }
        else if(pb == n) {
            sa+= a[pa];
            pa++;
        }
        else if(sa < sb) {
            sa+= a[pa];
            pa++;
        }
        else {
            sb+= b[pb];
            pb++;
        }

        ans = max(ans, min(sa - (pa+pb), sb - (pa+pb)));
    }

    cout.setf(ios::fixed);
    cout.precision(4);
    cout << ans << endl;
}

int32_t main() {
    ios::sync_with_stdio(false); cin.tie(0);

    // freopen("in.in", "r", stdin);
    //freopen("out.out", "w", stdout);

    int tt = 1;
    // cin >> tt;
    while(tt--) solve();

}

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