Submission #855329

#	Time	Username	Problem	Language	Result	Execution time	Memory
855329		vjudge1	Split the sequence (APIO14_sequence)	C++17	0 / 100	3 ms	604 KiB

sequence

#include <bits/stdc++.h>
#pragma GCC optimize("unroll-loops")
#pragma GCC optimize("Ofast")


using namespace std;

using lol= long long int;

typedef long long ll;
typedef long double ld;
typedef long long unsigned lli;
// #define _MAXM 16000
#define cl clear
// #define int ll
#define db double
#define pb push_back
#define ers erase
#define ds resize
#define W INT_MIN
#define mp make_pair
#define pll pair< long , long >
#define pii pair<ll, ll>
#define bc back()
mt19937 rng((int) chrono::steady_clock::now().time_since_epoch().count());
#define doc (clock() * 1.0 / CLOCKS_PER_SEC) < 1.0
#define all(v) v.begin(),v.end()





const int MAX = 100 + 5;
const int LOG = 18;
const ll INF = 1e9 + 7;
const ll inf = 1e18;
const int maxn = 1e5+5;
const double me = 1e-9;
const double PI=acos(-1.0);
const int M= 1e6;
const int mod =  998244353;
const int mxn=2e5+3;
const int MAXA = 1e6 + 10;
const int MOD =  1e9 + 7;
const int DN = 4008;
const int N = 1e5 + 123;


int n, k;


void kick(){


    cin >> n >> k;
    vector< ll > a(n + 1);
    for(int i = 1; i <= n; i++){
        cin >> a[i];
    }
    vector< vector< ll > > dp(k + 2, vector< ll >(n + 2, -INF));
    vector < vector< int > > p(k + 2, vector<int>(n + 2, 0));
    dp[0][0] = 0;
    vector< ll > pref(n + 2, 0);
    for(int i = 1; i <= n; i++){
        pref[i] += pref[i - 1];
        pref[i] += a[i];
    }
    for(int i = 1; i <= k + 1; i++){
        for(int j = 1; j <= n; j++){
            for(int k = 0; k < j; k++){
                if(dp[i][j] < dp[i - 1][k] + (pref[j] - pref[k]) * pref[k]){
                    dp[i][j] = dp[i - 1][k] + (pref[j] - pref[k]) * pref[k];
                    p[i][j] = k;
                }
            }
        }
    }
    vector< int > ans;
    int cur = n;
    for(int i = k; i > 0; i--){
        ans.push_back(p[i + 1][cur]);
        cur = p[i + 1][cur];
    }
    cout << dp[k + 1][n] << '\n';
    reverse(all(ans));
    for(auto i: ans){
        cout << i << " ";
    }


    
    
    


}




    
signed main(){
    #ifndef ONLINE_JUDGE
      freopen("input.in", "r" ,stdin);
    freopen("output.in", "w", stdout);
   #endif
    ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
 



    int T = 1;

    // cin >> T; 
    // cout.flush();

    
    while(T--){

        kick();
       
        
    }


    

    return 0;

    
}

Compilation message (stderr)

sequence.cpp: In function 'int main()':
sequence.cpp:104:14: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  104 |       freopen("input.in", "r" ,stdin);
      |       ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
sequence.cpp:105:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  105 |     freopen("output.in", "w", stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 11
• Subtask 2: 0 / 11
• Subtask 3: 0 / 11
• Subtask 4: 0 / 17
• Subtask 5: 0 / 21
• Subtask 6: 0 / 29