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Submission #1081903

# Submission time Handle Problem Language Result Execution time Memory
1081903 2024-08-30T12:43:40 Z kiethm07 Split the sequence (APIO14_sequence) C++11
28 / 100
 2000 ms 86748 KB 
#include <bits/stdc++.h>

#define pii pair<int,int>
#define iii pair<int,pii>
#define fi first
#define se second

#define vi vector<int>
#define vii vector<pii>
#define pb(i) push_back(i)
#define all(x) x.begin(),x.end()

#define TEXT "a"

using namespace std;

typedef long long ll;
typedef unsigned long long ull;
typedef long double ld;

const int inf = 1e9 + 7;
const ld eps = 1e-8;
const double pi = acos(-1);
const int N = 1e5 + 5;
const int K = 205;

int n,k;
ll p[N];
ll dp[N][K];
int pre[N][K];

struct line{
    ll a,b;
    int id;
    line(ll _a, ll _b, int _id){
        a = _a;
        b = _b;
        id = _id;
    }
    ll eval(ll x){
        return a * x + b;
    }
    double isect(const line& F) const{
        return 1.0 * (F.b - b) / (a - F.a);
    }
};

//struct CHT{
//    deque<line> dq;
//    void add(line F){
//        int n = dq.size();
//        while(n >= 2 && ){
//            n--;
//        }
//    }
//    pair<ll,int> query()
//};

int main(){
    cin.tie(0) -> sync_with_stdio(0);
    if (fopen(TEXT".inp","r")){
        freopen(TEXT".inp","r",stdin);
        freopen(TEXT".out","w",stdout);
    }
    cin >> n >> k;
    for (int i = 1; i <= n; i++){
        cin >> p[i];
        p[i] += p[i - 1];
    }
    for (int used = 1; used <= k; used++){
        for (int i = 1; i <= n; i++){
            for (int j = 0; j < i; j++){
                dp[i][used] = max(dp[i][used], dp[j][used - 1] + (p[i] - p[j]) * (p[n] - p[i]));
                if (dp[i][used] == dp[j][used - 1] + (p[i] - p[j]) * (p[n] - p[i])) pre[i][used] = j;
            }
        }
    }
    int best = 0;
    for (int i = 1; i <= n; i++){
        if (dp[i][k] >= dp[best][k]) best = i;
    }
    cout << dp[best][k] << "\n";
    vector<int> v;
    for (int used = k; used >= 1; used--){
        v.push_back(best);
        best = pre[best][used];
    }
    reverse(all(v));
    for (int i : v) cout << i << " ";
    return 0;
}

Compilation message

sequence.cpp: In function 'int main()':
sequence.cpp:62:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   62 |         freopen(TEXT".inp","r",stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
sequence.cpp:63:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   63 |         freopen(TEXT".out","w",stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB contestant found the optimal answer: 108 == 108
2 Correct 0 ms 348 KB contestant found the optimal answer: 999 == 999
3 Incorrect 0 ms 348 KB Integer 2 violates the range [1, 1]
4 Halted 0 ms 0 KB -

Subtask #2
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB contestant found the optimal answer: 1093956 == 1093956
2 Correct 0 ms 460 KB contestant found the optimal answer: 302460000 == 302460000
3 Correct 0 ms 348 KB contestant found the optimal answer: 122453454361 == 122453454361
4 Correct 1 ms 348 KB contestant found the optimal answer: 93663683509 == 93663683509
5 Correct 0 ms 348 KB contestant found the optimal answer: 1005304678 == 1005304678
6 Correct 0 ms 348 KB contestant found the optimal answer: 933702 == 933702
7 Correct 0 ms 348 KB contestant found the optimal answer: 25082842857 == 25082842857
8 Correct 1 ms 348 KB contestant found the optimal answer: 687136 == 687136
9 Correct 0 ms 604 KB contestant found the optimal answer: 27295930079 == 27295930079
10 Correct 1 ms 348 KB contestant found the optimal answer: 29000419931 == 29000419931

Subtask #3
0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 860 KB contestant found the optimal answer: 610590000 == 610590000
2 Correct 1 ms 860 KB contestant found the optimal answer: 311760000 == 311760000
3 Correct 6 ms 860 KB contestant found the optimal answer: 1989216017013 == 1989216017013
4 Correct 0 ms 860 KB contestant found the optimal answer: 1499437552673 == 1499437552673
5 Correct 4 ms 860 KB contestant found the optimal answer: 1019625819 == 1019625819
6 Incorrect 6 ms 956 KB Integer 200 violates the range [1, 199]
7 Halted 0 ms 0 KB -

Subtask #4
17.0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 2652 KB contestant found the optimal answer: 21503404 == 21503404
2 Correct 4 ms 2652 KB contestant found the optimal answer: 140412195 == 140412195
3 Correct 149 ms 2872 KB contestant found the optimal answer: 49729674225461 == 49729674225461
4 Correct 4 ms 2652 KB contestant found the optimal answer: 37485571387523 == 37485571387523
5 Correct 145 ms 2864 KB contestant found the optimal answer: 679388326 == 679388326
6 Correct 123 ms 2652 KB contestant found the optimal answer: 4699030287 == 4699030287
7 Correct 154 ms 2876 KB contestant found the optimal answer: 12418819758185 == 12418819758185
8 Correct 143 ms 2652 KB contestant found the optimal answer: 31093317350 == 31093317350
9 Correct 33 ms 2648 KB contestant found the optimal answer: 12194625429236 == 12194625429236
10 Correct 59 ms 2868 KB contestant found the optimal answer: 12345131038664 == 12345131038664

Subtask #5
0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 417 ms 24736 KB contestant found the optimal answer: 1818678304 == 1818678304
2 Correct 421 ms 24616 KB contestant found the optimal answer: 1326260195 == 1326260195
3 Execution timed out 2056 ms 24504 KB Time limit exceeded
4 Halted 0 ms 0 KB -

Subtask #6
0 / 29.0

# Verdict Execution time Memory Grader output
1 Execution timed out 2035 ms 86748 KB Time limit exceeded
2 Halted 0 ms 0 KB -