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답안 #994477

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
994477 2024-06-07T17:05:17 Z idiotcomputer Feast (NOI19_feast) C++11
4 / 100
 60 ms 4528 KB 
#include <bits/stdc++.h>
using namespace std;
#define ll long long int 
#define pii pair<ll,ll>
#define f first
#define s second

const int mxN = 3e5;
int n,k;
int a[mxN];

pii test(ll v){
    pii dp[2];
    pii dp2[2];
    dp[0] = {0,0};
    dp[1] = {0,0};
    for (int i = 0; i < n; i++){
        dp2[0] = max(dp[0],(pii){dp[1].f-v,dp[1].s+1});
        dp2[1] = max((pii) {dp[0].f+a[i],dp[0].s}, (pii) {dp[1].f+a[i],dp[1].s});
        swap(dp2,dp);
    }
    dp[1] = (pii) {dp[1].f,dp[1].s+1};
    return max(dp[0],dp[1]);
}


int main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    
    cin >> n >> k;
    for (int i = 0; i < n; i++) cin >> a[i];
    
    ll l = -1;
    ll r = 1e15;
    ll c;
    while (r-l>1){
        c = (l+r)/2;
        if(test(c).s<=k) r = c;
        else l = c;
    }
    pii t = test(r);
 //   cout << r << " -=  " << t.f << " " << t.s << '\n';
    cout << t.f - (t.s-k)*r << "\n";
    return 0;
}

Subtask #1
4.0 / 4.0

# 결과 실행 시간 메모리 Grader output
1 Correct 35 ms 4304 KB Output is correct
2 Correct 37 ms 4432 KB Output is correct
3 Correct 41 ms 4444 KB Output is correct
4 Correct 38 ms 4444 KB Output is correct
5 Correct 37 ms 4444 KB Output is correct
6 Correct 35 ms 4380 KB Output is correct
7 Correct 39 ms 4184 KB Output is correct
8 Correct 38 ms 4432 KB Output is correct
9 Correct 36 ms 4184 KB Output is correct
10 Correct 35 ms 4444 KB Output is correct

Subtask #2
0 / 8.0

# 결과 실행 시간 메모리 Grader output
1 Correct 38 ms 2652 KB Output is correct
2 Correct 33 ms 2648 KB Output is correct
3 Incorrect 32 ms 2648 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #3
0 / 18.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 60 ms 4528 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 0 ms 348 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #5
0 / 11.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 0 ms 348 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #6
0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 0 ms 348 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #7
0 / 29.0

# 결과 실행 시간 메모리 Grader output
1 Correct 35 ms 4304 KB Output is correct
2 Correct 37 ms 4432 KB Output is correct
3 Correct 41 ms 4444 KB Output is correct
4 Correct 38 ms 4444 KB Output is correct
5 Correct 37 ms 4444 KB Output is correct
6 Correct 35 ms 4380 KB Output is correct
7 Correct 39 ms 4184 KB Output is correct
8 Correct 38 ms 4432 KB Output is correct
9 Correct 36 ms 4184 KB Output is correct
10 Correct 35 ms 4444 KB Output is correct
11 Correct 38 ms 2652 KB Output is correct
12 Correct 33 ms 2648 KB Output is correct
13 Incorrect 32 ms 2648 KB Output isn't correct
14 Halted 0 ms 0 KB -