답안 #853386

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
853386	2023-09-24T09:09:46 Z	taitruong270	Feast (NOI19_feast)	C++17	100 / 100	359 ms	34132 KB

feast

/*==============================================================================================================
         __                    __                                             _____     ______    _______
        |  |                  |  |                                           /  __ \   / _____|  / ______|     
      __|  |__              __|  |__                                         |_|  | |  | |       | |  
     |__|   __|            |__|   __|                                             | |  | |____   | |_____ 
        |  |    _____   _     |  |    ____  __  __  ____    _____    _____       / /   \ ___  \  |  ___  \
        |  |   /  _  \ | |    |  |   /  _/ | | | | /  _  \ /  __ \  /  _  \     / /         | |  | |   | |
        |  |_  | |_| | | |    |  |_  | |   | |_| | | |_| | | |  | | | |_| |    / /___   ____| |  | |___| |
        \____\ \____/| |_|    \____\ |_|   \_____/ \_____/ |_|  |_| \____ |   |______| |______/  \_______/
                                                                        | |
                                                                      __/ |
                                                                     |___/  
                                        Pratice, practice, and practice
                                       Where is the bug, delete it there
                                     Try, try, try again until you succeed
I hated every minute of training, but I said, 'Don't quit. Suffer now and live the rest of your life as a champion.' - Mohamed Ali 
                              You may not be the best, but must be the most effort
     Even the things and people you like, you don't have the courage to take, you are destined to be a failure.
                                           Difficult means more time
                                          Done is better than perfect
                                         Pain + Reflection = Progress 
==============================================================================================================*/
#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define ld long double
#define endl '\n'
const ll mod = 1e9+7;

ll n, k, a[300005];
pair<ld, ll> dp[300005][3];  //sum doan, cnt doan
ld l, r, lambda;

bool check(ld m)
{
    dp[0][0]={0, 0};
    dp[0][1]={-1e18, 0};
    for (ll i=1; i<=n; i++)
    {
        dp[i][0]=max(dp[i-1][0], dp[i-1][1]);
        dp[i][1]=max(   make_pair(dp[i-1][1].first+a[i], dp[i-1][1].second),   //them a[i] vao doan truoc do
                        make_pair(dp[i-1][0].first+a[i]-m, dp[i-1][0].second+1));  // bat dau doan moi tai vi tri a[i]
    }
    return max(dp[n][0], dp[n][1]).second>=k;
}

void solve()
{
    cin>>n>>k;
    for (ll i=1; i<=n; i++) cin>>a[i];
    l=0, r=1e18;
    ld eps=1e-3;
    while (r-l>eps)
    {
        ld mid=(l+r)/2;
        if (check(mid)==true) l=mid;
        else r=mid;
    }
    lambda=l;
    check(lambda);
    cout<<llround(max(dp[n][0], dp[n][1]).first+lambda*k);
}

int main()
{
    ios_base::sync_with_stdio(false); cin.tie(NULL);
    clock_t start = clock();
    //#ifndef ONLINE_JUDGE
    //freopen("_input.txt", "r", stdin);
    //freopen("_output.txt", "w", stdout);
    //#endif
    solve();
    clock_t end = clock();
    cerr<<"Time: "<<fixed<<setprecision(10)<<double(end-start)/double(CLOCKS_PER_SEC)<<"\n";
    return 0;
}

Subtask #1
4.0 / 4.0

#	결과	실행 시간	메모리	Grader output
1	Correct	226 ms	30800 KB	Output is correct
2	Correct	228 ms	30940 KB	Output is correct
3	Correct	236 ms	30972 KB	Output is correct
4	Correct	230 ms	30800 KB	Output is correct
5	Correct	228 ms	30932 KB	Output is correct
6	Correct	223 ms	30892 KB	Output is correct
7	Correct	224 ms	30892 KB	Output is correct
8	Correct	225 ms	30704 KB	Output is correct
9	Correct	226 ms	30808 KB	Output is correct
10	Correct	222 ms	30800 KB	Output is correct

Subtask #2
8.0 / 8.0

#	결과	실행 시간	메모리	Grader output
1	Correct	228 ms	30908 KB	Output is correct
2	Correct	246 ms	30964 KB	Output is correct
3	Correct	220 ms	31064 KB	Output is correct
4	Correct	229 ms	30924 KB	Output is correct
5	Correct	227 ms	30800 KB	Output is correct
6	Correct	222 ms	32028 KB	Output is correct
7	Correct	230 ms	32336 KB	Output is correct
8	Correct	233 ms	33620 KB	Output is correct
9	Correct	228 ms	33616 KB	Output is correct
10	Correct	223 ms	32080 KB	Output is correct

Subtask #3
18.0 / 18.0

#	결과	실행 시간	메모리	Grader output
1	Correct	272 ms	31160 KB	Output is correct
2	Correct	271 ms	31068 KB	Output is correct
3	Correct	279 ms	30936 KB	Output is correct
4	Correct	271 ms	30908 KB	Output is correct
5	Correct	272 ms	30940 KB	Output is correct
6	Correct	276 ms	31172 KB	Output is correct
7	Correct	275 ms	30960 KB	Output is correct
8	Correct	268 ms	30800 KB	Output is correct
9	Correct	278 ms	31060 KB	Output is correct
10	Correct	271 ms	30884 KB	Output is correct

Subtask #4
10.0 / 10.0

#	결과	실행 시간	메모리	Grader output
1	Correct	1 ms	2392 KB	Output is correct
2	Correct	1 ms	2396 KB	Output is correct
3	Correct	1 ms	2396 KB	Output is correct
4	Correct	1 ms	2392 KB	Output is correct
5	Correct	1 ms	2396 KB	Output is correct
6	Correct	1 ms	2396 KB	Output is correct
7	Correct	1 ms	2396 KB	Output is correct
8	Correct	1 ms	2396 KB	Output is correct
9	Correct	1 ms	2392 KB	Output is correct
10	Correct	1 ms	2392 KB	Output is correct

Subtask #5
11.0 / 11.0

#	결과	실행 시간	메모리	Grader output
1	Correct	1 ms	2392 KB	Output is correct
2	Correct	1 ms	2396 KB	Output is correct
3	Correct	1 ms	2396 KB	Output is correct
4	Correct	1 ms	2392 KB	Output is correct
5	Correct	1 ms	2396 KB	Output is correct
6	Correct	1 ms	2396 KB	Output is correct
7	Correct	1 ms	2396 KB	Output is correct
8	Correct	1 ms	2396 KB	Output is correct
9	Correct	1 ms	2392 KB	Output is correct
10	Correct	1 ms	2392 KB	Output is correct
11	Correct	1 ms	2396 KB	Output is correct
12	Correct	1 ms	2396 KB	Output is correct
13	Correct	1 ms	2396 KB	Output is correct
14	Correct	1 ms	2544 KB	Output is correct
15	Correct	1 ms	2396 KB	Output is correct
16	Correct	1 ms	2396 KB	Output is correct
17	Correct	1 ms	2396 KB	Output is correct
18	Correct	1 ms	2396 KB	Output is correct
19	Correct	1 ms	2404 KB	Output is correct
20	Correct	1 ms	2396 KB	Output is correct

Subtask #6
20.0 / 20.0

#	결과	실행 시간	메모리	Grader output
1	Correct	1 ms	2392 KB	Output is correct
2	Correct	1 ms	2396 KB	Output is correct
3	Correct	1 ms	2396 KB	Output is correct
4	Correct	1 ms	2392 KB	Output is correct
5	Correct	1 ms	2396 KB	Output is correct
6	Correct	1 ms	2396 KB	Output is correct
7	Correct	1 ms	2396 KB	Output is correct
8	Correct	1 ms	2396 KB	Output is correct
9	Correct	1 ms	2392 KB	Output is correct
10	Correct	1 ms	2392 KB	Output is correct
11	Correct	1 ms	2396 KB	Output is correct
12	Correct	1 ms	2396 KB	Output is correct
13	Correct	1 ms	2396 KB	Output is correct
14	Correct	1 ms	2544 KB	Output is correct
15	Correct	1 ms	2396 KB	Output is correct
16	Correct	1 ms	2396 KB	Output is correct
17	Correct	1 ms	2396 KB	Output is correct
18	Correct	1 ms	2396 KB	Output is correct
19	Correct	1 ms	2404 KB	Output is correct
20	Correct	1 ms	2396 KB	Output is correct
21	Correct	3 ms	2652 KB	Output is correct
22	Correct	2 ms	2652 KB	Output is correct
23	Correct	3 ms	4700 KB	Output is correct
24	Correct	2 ms	2648 KB	Output is correct
25	Correct	2 ms	4700 KB	Output is correct
26	Correct	3 ms	4700 KB	Output is correct
27	Correct	3 ms	4700 KB	Output is correct
28	Correct	3 ms	4700 KB	Output is correct
29	Correct	3 ms	4696 KB	Output is correct
30	Correct	2 ms	2464 KB	Output is correct

Subtask #7
29.0 / 29.0

#	결과	실행 시간	메모리	Grader output
1	Correct	226 ms	30800 KB	Output is correct
2	Correct	228 ms	30940 KB	Output is correct
3	Correct	236 ms	30972 KB	Output is correct
4	Correct	230 ms	30800 KB	Output is correct
5	Correct	228 ms	30932 KB	Output is correct
6	Correct	223 ms	30892 KB	Output is correct
7	Correct	224 ms	30892 KB	Output is correct
8	Correct	225 ms	30704 KB	Output is correct
9	Correct	226 ms	30808 KB	Output is correct
10	Correct	222 ms	30800 KB	Output is correct
11	Correct	228 ms	30908 KB	Output is correct
12	Correct	246 ms	30964 KB	Output is correct
13	Correct	220 ms	31064 KB	Output is correct
14	Correct	229 ms	30924 KB	Output is correct
15	Correct	227 ms	30800 KB	Output is correct
16	Correct	222 ms	32028 KB	Output is correct
17	Correct	230 ms	32336 KB	Output is correct
18	Correct	233 ms	33620 KB	Output is correct
19	Correct	228 ms	33616 KB	Output is correct
20	Correct	223 ms	32080 KB	Output is correct
21	Correct	272 ms	31160 KB	Output is correct
22	Correct	271 ms	31068 KB	Output is correct
23	Correct	279 ms	30936 KB	Output is correct
24	Correct	271 ms	30908 KB	Output is correct
25	Correct	272 ms	30940 KB	Output is correct
26	Correct	276 ms	31172 KB	Output is correct
27	Correct	275 ms	30960 KB	Output is correct
28	Correct	268 ms	30800 KB	Output is correct
29	Correct	278 ms	31060 KB	Output is correct
30	Correct	271 ms	30884 KB	Output is correct
31	Correct	1 ms	2392 KB	Output is correct
32	Correct	1 ms	2396 KB	Output is correct
33	Correct	1 ms	2396 KB	Output is correct
34	Correct	1 ms	2392 KB	Output is correct
35	Correct	1 ms	2396 KB	Output is correct
36	Correct	1 ms	2396 KB	Output is correct
37	Correct	1 ms	2396 KB	Output is correct
38	Correct	1 ms	2396 KB	Output is correct
39	Correct	1 ms	2392 KB	Output is correct
40	Correct	1 ms	2392 KB	Output is correct
41	Correct	1 ms	2396 KB	Output is correct
42	Correct	1 ms	2396 KB	Output is correct
43	Correct	1 ms	2396 KB	Output is correct
44	Correct	1 ms	2544 KB	Output is correct
45	Correct	1 ms	2396 KB	Output is correct
46	Correct	1 ms	2396 KB	Output is correct
47	Correct	1 ms	2396 KB	Output is correct
48	Correct	1 ms	2396 KB	Output is correct
49	Correct	1 ms	2404 KB	Output is correct
50	Correct	1 ms	2396 KB	Output is correct
51	Correct	3 ms	2652 KB	Output is correct
52	Correct	2 ms	2652 KB	Output is correct
53	Correct	3 ms	4700 KB	Output is correct
54	Correct	2 ms	2648 KB	Output is correct
55	Correct	2 ms	4700 KB	Output is correct
56	Correct	3 ms	4700 KB	Output is correct
57	Correct	3 ms	4700 KB	Output is correct
58	Correct	3 ms	4700 KB	Output is correct
59	Correct	3 ms	4696 KB	Output is correct
60	Correct	2 ms	2464 KB	Output is correct
61	Correct	337 ms	33892 KB	Output is correct
62	Correct	340 ms	34032 KB	Output is correct
63	Correct	295 ms	34132 KB	Output is correct
64	Correct	342 ms	33984 KB	Output is correct
65	Correct	359 ms	34128 KB	Output is correct
66	Correct	344 ms	33972 KB	Output is correct
67	Correct	346 ms	33888 KB	Output is correct
68	Correct	277 ms	33964 KB	Output is correct
69	Correct	270 ms	34096 KB	Output is correct
70	Correct	267 ms	33760 KB	Output is correct

답안 #853386

Compilation message

Subtask #1 4.0 / 4.0

Subtask #2 8.0 / 8.0

Subtask #3 18.0 / 18.0

Subtask #4 10.0 / 10.0

Subtask #5 11.0 / 11.0

Subtask #6 20.0 / 20.0

Subtask #7 29.0 / 29.0

Subtask #1
4.0 / 4.0

Subtask #2
8.0 / 8.0

Subtask #3
18.0 / 18.0

Subtask #4
10.0 / 10.0

Subtask #5
11.0 / 11.0

Subtask #6
20.0 / 20.0

Subtask #7
29.0 / 29.0