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답안 #1017423

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
1017423 2024-07-09T07:53:17 Z concac Feast (NOI19_feast) C++17
100 / 100
 140 ms 15456 KB 
#include <bits/stdc++.h>
#define PI acos(-1.0)
#define pll pair<ll, ll>
#define ll long long
#define ld long double
#define endl "\n"
#define pb push_back
#define ff first
#define ss second
#define ins insert
#define pll2 pair<pll,ll>
#define bit(i,k) ((k>>i)&1)
#define pii pair<int,int>
#define mp make_pair

using namespace std;
const long long mod = 1e9+7;
const ll inf = 1e18;
const ll maxN = 3e5+5;
ll n,k;
ll a[maxN];
pll go(ll lambda){
  pll dp[n+5][2]={};//lay i hoac deo

  dp[0][1].ff=-inf;
  for(int i=1;i<=n;i++){
    dp[i][0]=max(dp[i-1][0],dp[i-1][1]);
    pll p1={dp[i-1][0].ff+a[i]-lambda,dp[i-1][0].ss+1};
    pll p2={dp[i-1][1].ff+a[i],dp[i-1][1].ss};
    dp[i][1]=max(p1,p2);
  }

  return max(dp[n][1],dp[n][0]);
}
void solve() {
  cin>>n>>k;
  for(int i=1;i<=n;i++){
    cin>>a[i];
  }
  ll l=0,r=inf;
  ll lmd;
  ll ans=-inf;
  while(l<r){
    ll md=(l+r+1)/2;
    pll p=go(md);
  
    if(p.ss>=k){ans=p.ff;l=md;}
    else{r=md-1;}
  }
  
  cout<<max(0ll,go(l).ff+k*l);


}
signed main() {
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    //  freopen("rao.inp", "r", stdin);
    // freopen("rao.out", "w", stdout);
    ll nhim = 1;
    // cin >> nhim;
    // cout<<nhim<<'\n';
    while (nhim--) {
        solve();
    }
}

Compilation message

feast.cpp: In function 'void solve()':
feast.cpp:42:6: warning: unused variable 'lmd' [-Wunused-variable]
   42 |   ll lmd;
      |      ^~~
feast.cpp:43:6: warning: variable 'ans' set but not used [-Wunused-but-set-variable]
   43 |   ll ans=-inf;
      |      ^~~

Subtask #1
4.0 / 4.0

# 결과 실행 시간 메모리 Grader output
1 Correct 66 ms 11804 KB Output is correct
2 Correct 67 ms 14832 KB Output is correct
3 Correct 66 ms 15032 KB Output is correct
4 Correct 68 ms 14932 KB Output is correct
5 Correct 80 ms 14860 KB Output is correct
6 Correct 69 ms 14416 KB Output is correct
7 Correct 66 ms 14424 KB Output is correct
8 Correct 69 ms 14672 KB Output is correct
9 Correct 84 ms 14416 KB Output is correct
10 Correct 68 ms 14672 KB Output is correct

Subtask #2
8.0 / 8.0

# 결과 실행 시간 메모리 Grader output
1 Correct 59 ms 11864 KB Output is correct
2 Correct 66 ms 13284 KB Output is correct
3 Correct 61 ms 12892 KB Output is correct
4 Correct 60 ms 12888 KB Output is correct
5 Correct 67 ms 14416 KB Output is correct
6 Correct 60 ms 12764 KB Output is correct
7 Correct 62 ms 13172 KB Output is correct
8 Correct 76 ms 14964 KB Output is correct
9 Correct 68 ms 14428 KB Output is correct
10 Correct 61 ms 13148 KB Output is correct

Subtask #3
18.0 / 18.0

# 결과 실행 시간 메모리 Grader output
1 Correct 108 ms 11856 KB Output is correct
2 Correct 95 ms 14888 KB Output is correct
3 Correct 96 ms 15192 KB Output is correct
4 Correct 95 ms 14708 KB Output is correct
5 Correct 93 ms 14936 KB Output is correct
6 Correct 97 ms 14932 KB Output is correct
7 Correct 94 ms 14936 KB Output is correct
8 Correct 94 ms 14964 KB Output is correct
9 Correct 112 ms 15456 KB Output is correct
10 Correct 96 ms 14932 KB Output is correct

Subtask #4
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 1 ms 344 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 1 ms 464 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 344 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct

Subtask #5
11.0 / 11.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 1 ms 344 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 1 ms 464 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 344 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 1 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 1 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 0 ms 432 KB Output is correct
18 Correct 1 ms 348 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 1 ms 348 KB Output is correct

Subtask #6
20.0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 1 ms 344 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 1 ms 464 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 344 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 1 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 1 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 0 ms 432 KB Output is correct
18 Correct 1 ms 348 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 1 ms 348 KB Output is correct
21 Correct 1 ms 492 KB Output is correct
22 Correct 1 ms 344 KB Output is correct
23 Correct 1 ms 476 KB Output is correct
24 Correct 1 ms 348 KB Output is correct
25 Correct 1 ms 344 KB Output is correct
26 Correct 2 ms 348 KB Output is correct
27 Correct 1 ms 344 KB Output is correct
28 Correct 1 ms 344 KB Output is correct
29 Correct 1 ms 496 KB Output is correct
30 Correct 1 ms 348 KB Output is correct

Subtask #7
29.0 / 29.0

# 결과 실행 시간 메모리 Grader output
1 Correct 66 ms 11804 KB Output is correct
2 Correct 67 ms 14832 KB Output is correct
3 Correct 66 ms 15032 KB Output is correct
4 Correct 68 ms 14932 KB Output is correct
5 Correct 80 ms 14860 KB Output is correct
6 Correct 69 ms 14416 KB Output is correct
7 Correct 66 ms 14424 KB Output is correct
8 Correct 69 ms 14672 KB Output is correct
9 Correct 84 ms 14416 KB Output is correct
10 Correct 68 ms 14672 KB Output is correct
11 Correct 59 ms 11864 KB Output is correct
12 Correct 66 ms 13284 KB Output is correct
13 Correct 61 ms 12892 KB Output is correct
14 Correct 60 ms 12888 KB Output is correct
15 Correct 67 ms 14416 KB Output is correct
16 Correct 60 ms 12764 KB Output is correct
17 Correct 62 ms 13172 KB Output is correct
18 Correct 76 ms 14964 KB Output is correct
19 Correct 68 ms 14428 KB Output is correct
20 Correct 61 ms 13148 KB Output is correct
21 Correct 108 ms 11856 KB Output is correct
22 Correct 95 ms 14888 KB Output is correct
23 Correct 96 ms 15192 KB Output is correct
24 Correct 95 ms 14708 KB Output is correct
25 Correct 93 ms 14936 KB Output is correct
26 Correct 97 ms 14932 KB Output is correct
27 Correct 94 ms 14936 KB Output is correct
28 Correct 94 ms 14964 KB Output is correct
29 Correct 112 ms 15456 KB Output is correct
30 Correct 96 ms 14932 KB Output is correct
31 Correct 1 ms 348 KB Output is correct
32 Correct 0 ms 348 KB Output is correct
33 Correct 1 ms 344 KB Output is correct
34 Correct 1 ms 348 KB Output is correct
35 Correct 1 ms 464 KB Output is correct
36 Correct 0 ms 348 KB Output is correct
37 Correct 0 ms 348 KB Output is correct
38 Correct 0 ms 344 KB Output is correct
39 Correct 0 ms 348 KB Output is correct
40 Correct 0 ms 348 KB Output is correct
41 Correct 1 ms 348 KB Output is correct
42 Correct 0 ms 348 KB Output is correct
43 Correct 0 ms 348 KB Output is correct
44 Correct 1 ms 348 KB Output is correct
45 Correct 0 ms 348 KB Output is correct
46 Correct 0 ms 348 KB Output is correct
47 Correct 0 ms 432 KB Output is correct
48 Correct 1 ms 348 KB Output is correct
49 Correct 0 ms 348 KB Output is correct
50 Correct 1 ms 348 KB Output is correct
51 Correct 1 ms 492 KB Output is correct
52 Correct 1 ms 344 KB Output is correct
53 Correct 1 ms 476 KB Output is correct
54 Correct 1 ms 348 KB Output is correct
55 Correct 1 ms 344 KB Output is correct
56 Correct 2 ms 348 KB Output is correct
57 Correct 1 ms 344 KB Output is correct
58 Correct 1 ms 344 KB Output is correct
59 Correct 1 ms 496 KB Output is correct
60 Correct 1 ms 348 KB Output is correct
61 Correct 131 ms 14856 KB Output is correct
62 Correct 125 ms 15220 KB Output is correct
63 Correct 121 ms 14820 KB Output is correct
64 Correct 131 ms 15116 KB Output is correct
65 Correct 140 ms 15104 KB Output is correct
66 Correct 137 ms 14968 KB Output is correct
67 Correct 135 ms 14816 KB Output is correct
68 Correct 121 ms 14956 KB Output is correct
69 Correct 96 ms 14684 KB Output is correct
70 Correct 97 ms 14684 KB Output is correct