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답안 #1112260

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
1112260 2024-11-13T23:07:26 Z tfgs Feast (NOI19_feast) C++17
100 / 100
 165 ms 5736 KB 
#include <bits/stdc++.h>
using namespace std;
#define int int64_t
const int inf=1e18;

#ifdef LOCAL
#include "algo/debug.h"
#endif

#define f first
#define s second
template<class T> using V = vector<T>; 
using vi = V<int>;
using vb = V<bool>;
using vs = V<string>;

#define all(x) begin(x), end(x)
#define rall(x) rbegin(x), rend(x) 
#define len(x) (int)((x).size())
#define rsz resize
#define ins insert
#define ft front()
#define bk back()
#define pb push_back
#define lb lower_bound
#define ub upper_bound
template<class T> int lwb(V<T>& a, const T& b) { return lb(all(a),b)-begin(a); }
template<class T> int upb(V<T>& a, const T& b) { return ub(all(a),b)-begin(a); }
template<class T> bool ckmin(T& a, const T& b) { return a > b ? a=b, true : false; }
template<class T> bool ckmax(T& a, const T& b) { return a < b ? a=b, true : false; }
#define pct __builtin_popcount
#define ctz __builtin_ctz
#define clz __builtin_clz
constexpr int p2(int x) { return (int)1 << x; }
constexpr int bits(int x) { return x == 0 ? 0 : 31-clz(x); } // floor(log2(x)) 
template<class T>void UNIQUE(V<T>& v) { sort(all(v)); v.erase(unique(all(v)),end(v)); }
template<class T,class U>void erase(T& t, const U& u) { auto it = t.find(u); assert(it != end(t)); t.erase(it); }

array<int,2> operator+(const array<int,2>& a,const array<int,2>&b){
    return {a[0]+b[0],a[1]+b[1]};
}

int n;
vi a;

array<int,2> calc_dp(int lambda){
    array<array<int,2>,2>dp;
    dp[0]={0,0};
    dp[1]={-inf,69};
    for(int i=0;i<n;i++){
        //continue the last segment
        dp[1][0]+=a[i];
        //start a new segment
        ckmax(dp[1],dp[0]+array<int,2>{a[i]-lambda,1});
        //already no segment
        //end the segment
        ckmax(dp[0],dp[1]);
    }
    auto score=max(dp[0],dp[1]);
    return score;
}

void solve() {
    int k;cin>>n>>k;
    a.rsz(n);
    for(int&i:a)cin>>i;
    int lo=0,hi=inf;
    while(hi-lo>1){
        int lambda=(lo+hi)/2;
        //regular dp
        //dp(i,0)=score if we've considered first i elts assuming:
        //0: we don't take the i-th elt
        //1: we take the ith elt
        //
        //score is (sum,+groups)
        calc_dp(lambda)[1]>=k?lo=lambda:hi=lambda;
    }
    cout<<calc_dp(lo)[0]+k*lo<<'\n';
}

signed main() {
    ios::sync_with_stdio(false);
    cin.tie(0); cout.tie(0);
    solve();
    return 0;
}

Subtask #1
4.0 / 4.0

# 결과 실행 시간 메모리 Grader output
1 Correct 151 ms 5456 KB Output is correct
2 Correct 165 ms 5456 KB Output is correct
3 Correct 154 ms 5456 KB Output is correct
4 Correct 156 ms 5456 KB Output is correct
5 Correct 153 ms 5456 KB Output is correct
6 Correct 151 ms 5448 KB Output is correct
7 Correct 150 ms 5200 KB Output is correct
8 Correct 156 ms 5448 KB Output is correct
9 Correct 150 ms 5456 KB Output is correct
10 Correct 156 ms 5448 KB Output is correct

Subtask #2
8.0 / 8.0

# 결과 실행 시간 메모리 Grader output
1 Correct 50 ms 3664 KB Output is correct
2 Correct 40 ms 3920 KB Output is correct
3 Correct 37 ms 3408 KB Output is correct
4 Correct 100 ms 3664 KB Output is correct
5 Correct 50 ms 5452 KB Output is correct
6 Correct 40 ms 3820 KB Output is correct
7 Correct 99 ms 3920 KB Output is correct
8 Correct 47 ms 5456 KB Output is correct
9 Correct 49 ms 5272 KB Output is correct
10 Correct 97 ms 3920 KB Output is correct

Subtask #3
18.0 / 18.0

# 결과 실행 시간 메모리 Grader output
1 Correct 79 ms 5712 KB Output is correct
2 Correct 69 ms 4424 KB Output is correct
3 Correct 81 ms 5564 KB Output is correct
4 Correct 65 ms 4680 KB Output is correct
5 Correct 65 ms 4688 KB Output is correct
6 Correct 65 ms 5712 KB Output is correct
7 Correct 73 ms 5484 KB Output is correct
8 Correct 76 ms 5568 KB Output is correct
9 Correct 71 ms 5712 KB Output is correct
10 Correct 70 ms 4424 KB Output is correct

Subtask #4
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 336 KB Output is correct
2 Correct 1 ms 336 KB Output is correct
3 Correct 1 ms 336 KB Output is correct
4 Correct 1 ms 336 KB Output is correct
5 Correct 1 ms 336 KB Output is correct
6 Correct 1 ms 336 KB Output is correct
7 Correct 1 ms 336 KB Output is correct
8 Correct 1 ms 336 KB Output is correct
9 Correct 1 ms 336 KB Output is correct
10 Correct 1 ms 336 KB Output is correct

Subtask #5
11.0 / 11.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 336 KB Output is correct
2 Correct 1 ms 336 KB Output is correct
3 Correct 1 ms 336 KB Output is correct
4 Correct 1 ms 336 KB Output is correct
5 Correct 1 ms 336 KB Output is correct
6 Correct 1 ms 336 KB Output is correct
7 Correct 1 ms 336 KB Output is correct
8 Correct 1 ms 336 KB Output is correct
9 Correct 1 ms 336 KB Output is correct
10 Correct 1 ms 336 KB Output is correct
11 Correct 1 ms 336 KB Output is correct
12 Correct 1 ms 336 KB Output is correct
13 Correct 1 ms 336 KB Output is correct
14 Correct 1 ms 336 KB Output is correct
15 Correct 1 ms 336 KB Output is correct
16 Correct 1 ms 336 KB Output is correct
17 Correct 1 ms 336 KB Output is correct
18 Correct 1 ms 336 KB Output is correct
19 Correct 1 ms 336 KB Output is correct
20 Correct 1 ms 336 KB Output is correct

Subtask #6
20.0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 336 KB Output is correct
2 Correct 1 ms 336 KB Output is correct
3 Correct 1 ms 336 KB Output is correct
4 Correct 1 ms 336 KB Output is correct
5 Correct 1 ms 336 KB Output is correct
6 Correct 1 ms 336 KB Output is correct
7 Correct 1 ms 336 KB Output is correct
8 Correct 1 ms 336 KB Output is correct
9 Correct 1 ms 336 KB Output is correct
10 Correct 1 ms 336 KB Output is correct
11 Correct 1 ms 336 KB Output is correct
12 Correct 1 ms 336 KB Output is correct
13 Correct 1 ms 336 KB Output is correct
14 Correct 1 ms 336 KB Output is correct
15 Correct 1 ms 336 KB Output is correct
16 Correct 1 ms 336 KB Output is correct
17 Correct 1 ms 336 KB Output is correct
18 Correct 1 ms 336 KB Output is correct
19 Correct 1 ms 336 KB Output is correct
20 Correct 1 ms 336 KB Output is correct
21 Correct 2 ms 336 KB Output is correct
22 Correct 1 ms 336 KB Output is correct
23 Correct 1 ms 336 KB Output is correct
24 Correct 2 ms 336 KB Output is correct
25 Correct 1 ms 336 KB Output is correct
26 Correct 1 ms 336 KB Output is correct
27 Correct 1 ms 476 KB Output is correct
28 Correct 1 ms 336 KB Output is correct
29 Correct 1 ms 336 KB Output is correct
30 Correct 1 ms 336 KB Output is correct

Subtask #7
29.0 / 29.0

# 결과 실행 시간 메모리 Grader output
1 Correct 151 ms 5456 KB Output is correct
2 Correct 165 ms 5456 KB Output is correct
3 Correct 154 ms 5456 KB Output is correct
4 Correct 156 ms 5456 KB Output is correct
5 Correct 153 ms 5456 KB Output is correct
6 Correct 151 ms 5448 KB Output is correct
7 Correct 150 ms 5200 KB Output is correct
8 Correct 156 ms 5448 KB Output is correct
9 Correct 150 ms 5456 KB Output is correct
10 Correct 156 ms 5448 KB Output is correct
11 Correct 50 ms 3664 KB Output is correct
12 Correct 40 ms 3920 KB Output is correct
13 Correct 37 ms 3408 KB Output is correct
14 Correct 100 ms 3664 KB Output is correct
15 Correct 50 ms 5452 KB Output is correct
16 Correct 40 ms 3820 KB Output is correct
17 Correct 99 ms 3920 KB Output is correct
18 Correct 47 ms 5456 KB Output is correct
19 Correct 49 ms 5272 KB Output is correct
20 Correct 97 ms 3920 KB Output is correct
21 Correct 79 ms 5712 KB Output is correct
22 Correct 69 ms 4424 KB Output is correct
23 Correct 81 ms 5564 KB Output is correct
24 Correct 65 ms 4680 KB Output is correct
25 Correct 65 ms 4688 KB Output is correct
26 Correct 65 ms 5712 KB Output is correct
27 Correct 73 ms 5484 KB Output is correct
28 Correct 76 ms 5568 KB Output is correct
29 Correct 71 ms 5712 KB Output is correct
30 Correct 70 ms 4424 KB Output is correct
31 Correct 1 ms 336 KB Output is correct
32 Correct 1 ms 336 KB Output is correct
33 Correct 1 ms 336 KB Output is correct
34 Correct 1 ms 336 KB Output is correct
35 Correct 1 ms 336 KB Output is correct
36 Correct 1 ms 336 KB Output is correct
37 Correct 1 ms 336 KB Output is correct
38 Correct 1 ms 336 KB Output is correct
39 Correct 1 ms 336 KB Output is correct
40 Correct 1 ms 336 KB Output is correct
41 Correct 1 ms 336 KB Output is correct
42 Correct 1 ms 336 KB Output is correct
43 Correct 1 ms 336 KB Output is correct
44 Correct 1 ms 336 KB Output is correct
45 Correct 1 ms 336 KB Output is correct
46 Correct 1 ms 336 KB Output is correct
47 Correct 1 ms 336 KB Output is correct
48 Correct 1 ms 336 KB Output is correct
49 Correct 1 ms 336 KB Output is correct
50 Correct 1 ms 336 KB Output is correct
51 Correct 2 ms 336 KB Output is correct
52 Correct 1 ms 336 KB Output is correct
53 Correct 1 ms 336 KB Output is correct
54 Correct 2 ms 336 KB Output is correct
55 Correct 1 ms 336 KB Output is correct
56 Correct 1 ms 336 KB Output is correct
57 Correct 1 ms 476 KB Output is correct
58 Correct 1 ms 336 KB Output is correct
59 Correct 1 ms 336 KB Output is correct
60 Correct 1 ms 336 KB Output is correct
61 Correct 97 ms 5704 KB Output is correct
62 Correct 93 ms 5736 KB Output is correct
63 Correct 79 ms 5712 KB Output is correct
64 Correct 96 ms 5712 KB Output is correct
65 Correct 97 ms 5712 KB Output is correct
66 Correct 116 ms 5712 KB Output is correct
67 Correct 100 ms 5540 KB Output is correct
68 Correct 70 ms 5712 KB Output is correct
69 Correct 70 ms 5712 KB Output is correct
70 Correct 65 ms 5540 KB Output is correct