Submission #196907

#	Time	Username	Problem	Language	Result	Execution time	Memory
196907		quocnguyen1012	수열 (APIO14_sequence)	C++14	0 / 100	2013 ms	44792 KiB

sequence

#include <bits/stdc++.h>

#define fi first
#define se second
#define mp make_pair
#define pb push_back

using namespace std;
typedef long long ll;

const int maxn = 1e5 + 5;

ll f[maxn][205];
int N, a[maxn], K;
ll sum[maxn];

signed main(void)
{
  ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
  if (fopen("A.INP", "r")){
    freopen("A.INP", "r", stdin);
    freopen("A.OUT", "w", stdout);
  }
  cin >> N >> K;
  for (int i = 1; i <= N; ++i){
    cin >> a[i];
    sum[i] = sum[i - 1] + a[i];
  }
  for (int j = 1; j <= K; ++j){
    for (int i = 1; i <= N; ++i){
      for (int k = 0; k < i; ++k){
        f[i][j] = max(f[i][j], f[k][j - 1] + 1ll * (sum[i] - sum[k]) * sum[k]);
      }
    }
  }
  cout << f[N][K];
}

Compilation message (stderr)

sequence.cpp: In function 'int main()':
sequence.cpp:21:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
     freopen("A.INP", "r", stdin);
     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~
sequence.cpp:22:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
     freopen("A.OUT", "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