Submission #855320

#	Time	Username	Problem	Language	Result	Execution time	Memory
855320		vjudge1	Split the sequence (APIO14_sequence)	C++17	50 / 100	2087 ms	49600 KiB

sequence

#include <bits/stdc++.h>
using namespace std;
mt19937 rnd(chrono::steady_clock::now().time_since_epoch().count());
// #define int long long
#pragma GCC optimize ("inline")
#pragma GCC optimize ("Ofast")
#pragma GCC optimize ("unroll-loops")
#pragma GCC optimize ("03")
#pragma GCC target ("sse,sse2,sse3,ssse3,sse4,popcnt,abm,avx2,mmx,fma,avx,tune=native")
const int N = 1e5 + 7, mod = 1e9 + 7;
int a[N];
long long dp[N][207], pref[N];
int pr[N][207];
void solve() {
    int n, K;
    cin>>n>>K;
    for(int i = 1; i <= n; i++) {
        cin>>a[i];
        pref[i] = pref[i - 1] + a[i];
    }
    long long maxx = 0;
    for(int i = 1; i <= n; i++) {
        for(int j = 1; j <= min(K, i); j++) {
            for(int k = 1; k < i; k++) {
                long long x = dp[k][j - 1] + (pref[i] - pref[k]) * 1ll * pref[k];
                if(x >= dp[i][j]) {
                    dp[i][j] = x;
                    pr[i][j] = k;
                }
            }
        }
    }
    cout << dp[n][K] << '\n';
    int j = pr[n][K];
    int cnt = K;
    vector<int> ans;
    while(j > 0) {
        ans.push_back(j);
        j = pr[j][--cnt];
    }
    reverse(ans.begin(), ans.end());
    for(auto to : ans)cout << to << ' ';
    cout << '\n';
}
signed main() {
    // freopen ("sequence.in", "r", stdin);
    // freopen ("sequence.out", "w", stdout);
    ios_base::sync_with_stdio(NULL);    
    cin.tie(NULL);
    int t = 1;
    // cin>>t;
    // int cases = 0;
    while(t -- ) {
        // cases ++;
        // cout << "Case " << cases << ": ";
        solve();
    }    
}
/*

*/

Compilation message (stderr)

sequence.cpp: In function 'void solve()':
sequence.cpp:21:15: warning: unused variable 'maxx' [-Wunused-variable]
   21 |     long long maxx = 0;
      |               ^~~~

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