Submission #855402

#	Time	Username	Problem	Language	Result	Execution time	Memory
855402		vjudge1	Split the sequence (APIO14_sequence)	C++17	0 / 100	2 ms	856 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< int > a(n+ 1);
    int sum = 0;
    for(int i = 1; i <= n; i++){
        cin >> a[i];
        sum += a[i];
        a[i] += a[i - 1];
    }
    k++;
    vector<vector<int>> dp(n + 1, vector<int>(k + 1, INF));
    vector<vector<int>> par(n + 1, vector<int>(k + 1, -1));
    dp[0][0] = 0;
    for (int i = 1; i <= n; i++){
        for (int j = 1; j <= k; j++){
            for (int i1 = 0; i1 < i; i1++){
                int val = dp[i1][j - 1] + (a[i] - a[i1]) * (a[i] - a[i1]);
                if (val < dp[i][j]){
                    dp[i][j] = val;
                    par[i][j] = i1;
                }
            }
        }
    }
    
    int res = (sum * sum) - (dp[n][k]);
    res /= 2;
    cout << res << '\n';
    
    vector <int> ans;
    int i = n;
    while (par[i][k] != 0){
        i = par[i][k];
        k--;
        ans.push_back(i);
    }
    
    reverse(ans.begin(), ans.end());
    for (auto x : ans){
        cout << x << " ";
    }
    cout << '\n';


}




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



    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