Submission #112349

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
112349	2019-05-19 02:25:25	ainta	Split the sequence (APIO14_sequence)	C++17	100 / 100	560 ms	6620 KiB

sequence

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#include<cstdio>
#include<algorithm>
#include<vector>
#define N_ 101000
using namespace std;
int n, K, w[N_], MnC[N_], MxC[N_], MxP[N_], MnP[N_];
long long S[N_], D[N_];
struct Seg {
  long long A, B;
  int num;
}Deq[N_];
bool Over(Seg a, Seg b, Seg c) {
  if (a.A == b.A) return true;
  long long A = b.B - a.B, B = a.A - b.A, C = c.B - a.B, D = a.A - c.A;
  if (A/B != C/D)return A/B >= C/D;
  A %= B, C %= D;
  return A * D >= B * C;
}
long long Get(Seg a, long long x) {
  return a.A*x + a.B;
}
void Calc(long long M) {
  int i;
  int head = 1, tail = 0;
  Deq[++tail] = { 0,0,0 };
  for (i = 1; i <= n; i++) {
    while (head < tail && Get(Deq[head], S[i]) >= Get(Deq[head + 1], S[i]))head++;
    MxC[i] = MxC[Deq[head].num] + 1;
    MxP[i] = Deq[head].num;
    D[i] = Get(Deq[head], S[i]) + S[i] * S[i] + M;
 
 
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Compilation message (stderr)

sequence.cpp: In function 'int main()':
sequence.cpp:49:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d%d", &n, &K);
  ~~~~~^~~~~~~~~~~~~~~~
sequence.cpp:51:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d", &w[i]);
   ~~~~~^~~~~~~~~~~~~

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