Submission #704646

#	Time	Username	Problem	Language	Result	Execution time	Memory
704646		Alihan_8	Split the sequence (APIO14_sequence)	C++17	0 / 100	9 ms	1620 KiB

sequence

#include <bits/stdc++.h>
// include <ext/pb_ds/assoc_container.hpp>
// include <ext/pb_ds/tree_policy.hpp>
// using namespace __gnu_pbds;
using namespace std;
#define all(x) x.begin(), x.end()
#define pb push_back
// define ordered_set tree<int,null_type,less<int>,rb_tree_tag,tree_order_statistics_node_update>
#define mpr make_pair
#define ln '\n'
void IO(string name){freopen((name+".in").c_str(),"r",stdin); freopen((name+".out").c_str(),"w",stdout);}
#define int long long
signed main(){
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);

    int n, k; cin >> n >> k;
    vector <int> p(n);
    for ( auto &i: p ) cin >> i;
    priority_queue <tuple<pair<int,int>,int,int>> q;
    auto f = [&](int l, int r){
        int pref = 0, cnt = 0, it = 0, Mx = 0;
        for ( int i = l; i <= r; i++ ) pref += p[i];
        for ( int i = l; i <= r; i++ ){
            cnt += p[i];
            if ( Mx < (pref-cnt)*cnt ){
                Mx = (pref-cnt)*cnt;
                it = i;
            }
        }
        pair <int,int> ans = {Mx, it};
        return ans;
    };
    q.push({f(0, n-1), 0, n-1});
    int cnt = 0;
    vector <int> res;
    while ( !q.empty() and k > 0 ){
        auto [val, L, R] = q.top();
        q.pop();
        if ( L >= R ) continue;
        auto [Mx, it] = val;
        res.pb(it);
        cnt += Mx; k--;
        q.push({f(L, it), L, it});
        q.push({f(it+1, R), it+1, R});
    }
    cout << cnt << ln;
    for ( auto i: res ) cout << ++i << ' ';

    cout << '\n';
}
/*
7 3
4 1 3 4 0 2 3
*/

Compilation message (stderr)

sequence.cpp: In function 'void IO(std::string)':
sequence.cpp:11:29: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   11 | void IO(string name){freopen((name+".in").c_str(),"r",stdin); freopen((name+".out").c_str(),"w",stdout);}
      |                      ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
sequence.cpp:11:70: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   11 | void IO(string name){freopen((name+".in").c_str(),"r",stdin); freopen((name+".out").c_str(),"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