Submission #1137

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
1137	2013-06-27 12:30:25	kriii	Watching (JOI13_watching)	C++98	100 / 100	248 ms	17032 KiB

watching

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#include <stdio.h>
#include <algorithm>
using namespace std;
int N,P,Q,A[2020];
int D[2020][2020];
bool chk(int w)
{
  if (w <= 0) return false;
  int i,j=1,k=1,l;
  for (i=1;i<=N;i++){
    while (A[i] - A[j] >= w) j++;
    while (A[i] - A[k] >= w * 2) k++;
    for (l=0;l<=Q;l++) D[i][l] = D[j-1][l] + 1;
    for (l=0;l<=Q;l++){
      if (D[i][l+1] > D[k-1][l])
        D[i][l+1] = D[k-1][l];
    }
  }
  for (l=0;l<=Q;l++) if (D[N][l] <= P) return true;
  return false;
}
int main()
{
  int i;
 
 
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• Subtask 1: 50 / 50
• Subtask 2: 50 / 50