답안 #222189

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
222189	2020-04-12T09:58:25 Z	kartel	Akvizna (COCI19_akvizna)	C++14	130 / 130	608 ms	7544 KB

akvizna

#include <bits/stdc++.h>
#define in(x) freopen(x,"r",stdin)
#define out(x) freopen(x,"w",stdout)
#define F first
#define S second
#define pb push_back
#define M ll(998244353)
#define inf ll(2e9+7)
#define N ll(200500)
#define sz(x) x.size()
//#pragma GCC optimize("unroll-loops")
//#pragma GCC optimize("O3")
//#pragma GCC optimize("Ofast")
#define el '\n'
using namespace std;
typedef unsigned long long ull;
typedef long long ll;
typedef long double ld;

//#include <ext/pb_ds/assoc_container.hpp>
//#include <ext/pb_ds/tree_policy.hpp>
//using namespace __gnu_pbds;
//typedef tree <ll, null_type, less_equal <ll>, rb_tree_tag, tree_order_statistics_node_update> os;

ld f[N], b[N];
ll n, m, i, j, kol, sz, num[N], pr, K;
ld cht[N], k[N];

void AddInCHT(int i)
{
    ld x;
    while (1)
    {
        pr = num[sz];

        x = (b[pr] - b[i]) / (k[i] - k[pr]);
//        cerr << x << el;

        if (x - cht[sz] > 1e-18) break;

        sz--;
    }

    sz++;

    cht[sz] = x;
    num[sz] = i;
}

int ch(ld X)
{
    sz = 1;

    cht[sz] = -1e18;

    num[sz] = n;

    b[n] = 0;
    f[n] = 0;
    k[n] = 1.0 / ld(n);

    for (i = n - 1; i >= 0; i--)
        {
            int l = 1;
            int r = sz;

            while (l < r)
            {
                int md = (l + r + 1) >> 1;
                ld x = cht[md];

                if (x + ld(i) < 1e-18) l = md;
                                  else r = md - 1;
            }

            K = num[l];

            f[i] = f[K] + 1;

            b[i] = b[K] + 1 - ld(i) * k[K] + X;

            k[i] = ld(1) / ld(i);

            AddInCHT(i);
        }

    return f[0];
}

int main()
{
//    in("input.txt");
//    out("output.txt");

    ios_base::sync_with_stdio(false);
    iostream::sync_with_stdio(false);
    cin.tie(NULL);

    cin >> n >> m;

    ld l = 0;
    ld r = 1e12;

    while (r - l > 1e-18)
    {
        ld md = (l + r) * 0.5;

        if (ch(-md) > m) l = md + 1e-18;
                   else r = md;

    }

    ch(-l);

    cout << setprecision(9) << fixed << b[0] + l * ld(m);
}

Subtask #1
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	5 ms	384 KB	Output is correct
2	Correct	5 ms	384 KB	Output is correct
3	Correct	5 ms	384 KB	Output is correct

Subtask #2
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	5 ms	384 KB	Output is correct
2	Correct	5 ms	384 KB	Output is correct
3	Correct	5 ms	384 KB	Output is correct

Subtask #3
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	5 ms	384 KB	Output is correct
2	Correct	5 ms	384 KB	Output is correct
3	Correct	5 ms	384 KB	Output is correct

Subtask #4
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	5 ms	384 KB	Output is correct
2	Correct	5 ms	384 KB	Output is correct
3	Correct	5 ms	384 KB	Output is correct

Subtask #5
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	18 ms	640 KB	Output is correct
2	Correct	20 ms	640 KB	Output is correct
3	Correct	18 ms	512 KB	Output is correct

Subtask #6
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	17 ms	640 KB	Output is correct
2	Correct	19 ms	512 KB	Output is correct
3	Correct	18 ms	512 KB	Output is correct

Subtask #7
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	18 ms	640 KB	Output is correct
2	Correct	17 ms	512 KB	Output is correct
3	Correct	16 ms	512 KB	Output is correct

Subtask #8
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	18 ms	640 KB	Output is correct
2	Correct	19 ms	512 KB	Output is correct
3	Correct	17 ms	640 KB	Output is correct

Subtask #9
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	18 ms	640 KB	Output is correct
2	Correct	17 ms	640 KB	Output is correct
3	Correct	17 ms	512 KB	Output is correct

Subtask #10
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	17 ms	512 KB	Output is correct
2	Correct	19 ms	512 KB	Output is correct
3	Correct	19 ms	656 KB	Output is correct

Subtask #11
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	18 ms	640 KB	Output is correct
2	Correct	20 ms	640 KB	Output is correct
3	Correct	17 ms	640 KB	Output is correct

Subtask #12
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	21 ms	640 KB	Output is correct
2	Correct	19 ms	660 KB	Output is correct
3	Correct	18 ms	512 KB	Output is correct

Subtask #13
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	18 ms	512 KB	Output is correct
2	Correct	27 ms	560 KB	Output is correct
3	Correct	18 ms	512 KB	Output is correct

Subtask #14
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	500 ms	6840 KB	Output is correct
2	Correct	529 ms	7160 KB	Output is correct
3	Correct	481 ms	6776 KB	Output is correct

Subtask #15
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	497 ms	7032 KB	Output is correct
2	Correct	516 ms	7416 KB	Output is correct
3	Correct	484 ms	7160 KB	Output is correct

Subtask #16
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	482 ms	6904 KB	Output is correct
2	Correct	543 ms	7440 KB	Output is correct
3	Correct	550 ms	7292 KB	Output is correct

Subtask #17
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	506 ms	7288 KB	Output is correct
2	Correct	517 ms	7164 KB	Output is correct
3	Correct	480 ms	7032 KB	Output is correct

Subtask #18
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	503 ms	7032 KB	Output is correct
2	Correct	551 ms	7416 KB	Output is correct
3	Correct	525 ms	6908 KB	Output is correct

Subtask #19
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	521 ms	7544 KB	Output is correct
2	Correct	527 ms	7032 KB	Output is correct
3	Correct	508 ms	7160 KB	Output is correct

Subtask #20
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	512 ms	7160 KB	Output is correct
2	Correct	504 ms	6908 KB	Output is correct
3	Correct	510 ms	7032 KB	Output is correct

Subtask #21
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	516 ms	6904 KB	Output is correct
2	Correct	572 ms	7388 KB	Output is correct
3	Correct	515 ms	6868 KB	Output is correct

Subtask #22
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	524 ms	7392 KB	Output is correct
2	Correct	550 ms	7256 KB	Output is correct
3	Correct	577 ms	7420 KB	Output is correct

Subtask #23
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	556 ms	7356 KB	Output is correct
2	Correct	547 ms	7068 KB	Output is correct
3	Correct	565 ms	7352 KB	Output is correct

Subtask #24
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	583 ms	7424 KB	Output is correct
2	Correct	588 ms	7460 KB	Output is correct
3	Correct	608 ms	7456 KB	Output is correct

Subtask #25
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	535 ms	7388 KB	Output is correct
2	Correct	574 ms	7544 KB	Output is correct
3	Correct	584 ms	7452 KB	Output is correct

Subtask #26
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	558 ms	7420 KB	Output is correct
2	Correct	566 ms	7544 KB	Output is correct
3	Correct	554 ms	7544 KB	Output is correct

답안 #222189

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