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Submission #800982

# Submission time Handle Problem Language Result Execution time Memory
800982 2023-08-02T03:26:04 Z vjudge1 Sure Bet (CEOI17_sure) C++11
100 / 100
 73 ms 3456 KB 
#include <iostream>
#include <algorithm>
#include <string>
#include <sstream>
#include <deque>
#include <queue>
#include <vector>
#include <unordered_map>
#include <set>
#include <iomanip>
using namespace std;
using lli = long long;
using ldb = long double;
const int maxN = 1e5;
ldb a[maxN + 1];
ldb b[maxN + 1];
ldb ps[maxN + 1];
int n;

ldb Calc(ldb resa, ldb resb, int pb)
{
    if (resb >= resa)
        return resb;
    int low = pb;
    int high = n;
    while (low <= high)
    {
        int mid = (low + high) / 2;
        if (resa - (mid - pb + 1) >= resb + ps[mid] - ps[pb - 1] - (mid - pb + 1))
            low = mid + 1;
        else
            high = mid - 1;
    }
    --low;
    resa -= (low - pb + 1);
    resb += ps[low] - ps[pb - 1] - (low - pb + 1);
    ldb res = resb;
    if (low < n)
        res = max(res, resa - 1);
    return res;
}

int main()
{
#ifdef LeMinhDuc
    freopen("inp.txt", "r", stdin);
#endif
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
    cin >> n;
    for (int i = 1; i <= n; ++i)
        cin >> a[i] >> b[i];
    sort(a + 1, a + n + 1);
    sort(b + 1, b + n + 1);

    ldb ans = 0;
    int cnt = 0;
    ldb resa = 0;
    ldb resb = 0;
    int c1 = n;
    int c2 = n;

    while(true)
    {
        if (c1 == 0 && c2 == 0) break;
        if(c1 == 0)
        {
            resb += b[c2];
            c2--;
            cnt++;
        }
        else if(c2 == 0)
        {
            resa += a[c1];
            c1--;
            cnt++;
        }
        else if (resa < resb)
        {
            resa += a[c1];
            c1--;
            cnt++;
        }
        else if (resa > resb)
        {
            resb += b[c2];
            c2--;
            cnt++;
        }
        else if (resa == resb)
        {
            if (c2 == 0 || a[c1] > b[c2])
            {
                resa += a[c1];
                c1--;
                cnt++;
            }
            else if(c1 == 0 || a[c1] <= b[c2])
            {
                resb += b[c2];
                c2--;
                cnt++;
            }
        }
        long double res = min(resa - cnt , resb - cnt);
        ans = max(ans , res);
    }
    cout<<fixed << setprecision(4) <<ans;
}

Subtask #1
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 0 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 0 ms 340 KB Output is correct
6 Correct 0 ms 340 KB Output is correct

Subtask #2
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 0 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 0 ms 340 KB Output is correct
6 Correct 0 ms 340 KB Output is correct
7 Correct 0 ms 340 KB Output is correct
8 Correct 0 ms 340 KB Output is correct
9 Correct 0 ms 340 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 1 ms 340 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 1 ms 340 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 1 ms 340 KB Output is correct
16 Correct 1 ms 340 KB Output is correct

Subtask #3
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 0 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 0 ms 340 KB Output is correct
6 Correct 0 ms 340 KB Output is correct
7 Correct 0 ms 340 KB Output is correct
8 Correct 0 ms 340 KB Output is correct
9 Correct 0 ms 340 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 1 ms 340 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 1 ms 340 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 1 ms 340 KB Output is correct
16 Correct 1 ms 340 KB Output is correct
17 Correct 67 ms 3456 KB Output is correct
18 Correct 65 ms 3424 KB Output is correct
19 Correct 66 ms 3424 KB Output is correct
20 Correct 67 ms 3448 KB Output is correct
21 Correct 70 ms 3404 KB Output is correct
22 Correct 65 ms 3424 KB Output is correct
23 Correct 73 ms 3448 KB Output is correct
24 Correct 65 ms 3332 KB Output is correct
25 Correct 67 ms 3448 KB Output is correct
26 Correct 72 ms 3436 KB Output is correct