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Submission #151731

# Submission time Handle Problem Language Result Execution time Memory
151731 2019-09-04T11:44:53 Z forestryks Sure Bet (CEOI17_sure) C++14
100 / 100
 125 ms 5240 KB 
#include <bits/stdc++.h>
using namespace std;

using ll = long long;
using ld = long double;
using pii = pair<int, int>;
#define rep(i, n) for (int (i) = 0; (i) < (n); ++(i))
#define all(x) (x).begin(), (x).end()
#define FAST_IO ios_base::sync_with_stdio(false); cin.tie(0); cout.tie(0);

const int MAXN = 2e5 + 5;
int n;
ld a[MAXN];
ld b[MAXN];

int main() {
    FAST_IO;
    cout.precision(10);
    cout.setf(ios::fixed);

    cin >> n;
    rep(i, n) {
        cin >> a[i] >> b[i];
    }

    sort(a, a + n);
    sort(b, b + n);
    reverse(a, a + n);
    reverse(b, b + n);

    // ld res = 0;

    // ld s1 = 0;
    // rep(i, n) {
    //     s1 += a[i];
    //     ld s2 = 0;
    //     rep(j, n) {
    //         s2 += b[j];
    //         res = max(res, min(s1, s2) - i - j - 2);
    //     }
    // }

    // cout << res << endl;

    ld s1 = 0, s2 = 0;
    int p1 = 0, p2 = 0;
    ld res = 0;
    for (int c = 0; c < n * 2; ++c) {
        if (s1 < s2 && p1 < n) {
            s1 += a[p1++];
        } else {
            s2 += b[p2++];
        }
        res = max(res, min(s1, s2) - c - 1);
    }

    // cout << res << endl;
    printf("%.4lf",(double)res);
}

Subtask #1
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 380 KB Output is correct
2 Correct 2 ms 376 KB Output is correct
3 Correct 1 ms 376 KB Output is correct
4 Correct 2 ms 376 KB Output is correct
5 Correct 3 ms 376 KB Output is correct
6 Correct 2 ms 376 KB Output is correct

Subtask #2
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 380 KB Output is correct
2 Correct 2 ms 376 KB Output is correct
3 Correct 1 ms 376 KB Output is correct
4 Correct 2 ms 376 KB Output is correct
5 Correct 3 ms 376 KB Output is correct
6 Correct 2 ms 376 KB Output is correct
7 Correct 2 ms 376 KB Output is correct
8 Correct 2 ms 376 KB Output is correct
9 Correct 2 ms 376 KB Output is correct
10 Correct 2 ms 376 KB Output is correct
11 Correct 2 ms 376 KB Output is correct
12 Correct 3 ms 376 KB Output is correct
13 Correct 3 ms 376 KB Output is correct
14 Correct 4 ms 376 KB Output is correct
15 Correct 3 ms 376 KB Output is correct
16 Correct 4 ms 348 KB Output is correct

Subtask #3
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 380 KB Output is correct
2 Correct 2 ms 376 KB Output is correct
3 Correct 1 ms 376 KB Output is correct
4 Correct 2 ms 376 KB Output is correct
5 Correct 3 ms 376 KB Output is correct
6 Correct 2 ms 376 KB Output is correct
7 Correct 2 ms 376 KB Output is correct
8 Correct 2 ms 376 KB Output is correct
9 Correct 2 ms 376 KB Output is correct
10 Correct 2 ms 376 KB Output is correct
11 Correct 2 ms 376 KB Output is correct
12 Correct 3 ms 376 KB Output is correct
13 Correct 3 ms 376 KB Output is correct
14 Correct 4 ms 376 KB Output is correct
15 Correct 3 ms 376 KB Output is correct
16 Correct 4 ms 348 KB Output is correct
17 Correct 113 ms 3548 KB Output is correct
18 Correct 112 ms 3628 KB Output is correct
19 Correct 113 ms 3704 KB Output is correct
20 Correct 113 ms 3656 KB Output is correct
21 Correct 125 ms 3664 KB Output is correct
22 Correct 112 ms 4856 KB Output is correct
23 Correct 113 ms 4864 KB Output is correct
24 Correct 113 ms 4856 KB Output is correct
25 Correct 113 ms 4788 KB Output is correct
26 Correct 121 ms 5240 KB Output is correct