Submission #1307079

#	Time	Username	Problem	Language	Result	Execution time	Memory
1307079		chithanhnguyen	Sure Bet (CEOI17_sure)	C++20	100 / 100	59 ms	3800 KiB

sure

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

#define int long long
#define ull unsigned long long
#define ld long double
#define pii pair<int, int>
#define fi first
#define se second
#define __builtin_popcount __builtin_popcountll
#define all(x) (x).begin(), (x).end()
#define BIT(x, i) (((x) >> (i)) & 1)
#define MASK(x) ((1ll << (x)))

#define debug(a, l, r) for (int _i = (l); _i <= (r); ++_i) cout << (a)[_i] << ' '; cout << '\n';

int n;

signed main() {
    #ifdef NCTHANH
    freopen("input.txt", "r", stdin);
    freopen("output.txt", "w", stdout);
    #endif
    ios_base::sync_with_stdio(0);
    cin.tie(nullptr); cout.tie(nullptr);

    cin >> n;
    vector<ld> a, b;
    for (int i = 1; i <= n; ++i) {
        ld x, y; cin >> x >> y;
        a.push_back(x);
        b.push_back(y);
    }

    sort(all(a));
    sort(all(b));
    ld suma = 0, sumb = 0, res = 0;
    int iter = 0;
    while (!a.empty() || !b.empty()) {
        if (a.empty()) {
            ld cur = b.back(); b.pop_back();
            // cout << cur << '\n';
            sumb += cur;
        }
        else if (b.empty()) {
            ld cur = a.back(); a.pop_back();
            // cout << cur << '\n';
            suma += cur;
        }
        else if (suma < sumb) {
            ld cur = a.back(); a.pop_back();
            // cout << cur << '\n';
            suma += cur;
        }
        else {
            ld cur = b.back(); b.pop_back();
            // cout << cur << '\n';
            sumb += cur;
        }

        ++iter;
        // if (iter == 10) break;
        res = max(res, min(suma, sumb) - (ld)iter);
    }

    cout << fixed << setprecision(4);
    cout << res;

    return 0;
}

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