Submission #1255254

#	Time	Username	Problem	Language	Result	Execution time	Memory
1255254		duybinhbeo	Split the sequence (APIO14_sequence)	C++20	0 / 100	182 ms	158784 KiB

sequence

#include <bits/stdc++.h>
#define ll long long
#define int long long
using namespace std;

int dp[100001][201];
int a[100001];
int b[100001];
int trace[100001][201];

signed main(){
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    freopen("inp.txt","r",stdin);
    freopen("out.txt","w",stdout);
    int n,k; cin >> n >> k;
    for (int i = 1; i <= n; ++i){
        cin >> a[i];
        b[i]=b[i-1]+a[i];
    }
    for (int j = 2; j <= k+1; ++j){
        for (int i = 1; i <= n; ++i){
            for (int q = 1; q < i; ++q){
                if (dp[i][j] <= dp[q][j-1]+b[q]*(b[i]-b[q])){
                    dp[i][j] = max(dp[i][j],dp[q][j-1]+b[q]*(b[i]-b[q]));
                    trace[i][j] = q;
                }
            }
        }
    }
    cout << dp[n][k+1] << '\n';
    int d = k+1,u = n;
    vector<int>ans;
    while (d > 1){
        ans.push_back(trace[u][d]);
        u = trace[u][d]; --d;
    }
    reverse(ans.begin(),ans.end());
    for (int i : ans) cout << i << ' ';
}

Compilation message (stderr)

sequence.cpp: In function 'int main()':
sequence.cpp:14:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   14 |     freopen("inp.txt","r",stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~
sequence.cpp:15:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   15 |     freopen("out.txt","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