Submission #384236

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
384236	2021-03-31 20:37:57	wind_reaper	Watching (JOI13_watching)	C++17	100 / 100	263 ms	16108 KiB

watching

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
#include <bits/stdc++.h>
using namespace std;
  
const int MXN = 2001;
int dp[MXN][MXN], a[MXN];
int n, p, q;
bool check(int w){
  memset(dp, 0, sizeof dp);
  for(int i = 1; i <= n; i++){
    int l = 1, r = 1;
    while(a[i] - a[l] >= w) l++;
    while(a[i] - a[r] >= 2*w) r++;
    for(int j = 0; j <= p; j++)
      if(j == 0) dp[i][j] = dp[r-1][j] + 1;
      else dp[i][j] = min(dp[l-1][j-1], dp[r-1][j] + 1);
  }
  return dp[n][p] <= q;
}
int32_t main(){
  ios_base::sync_with_stdio(false); 
  cin.tie(NULL); 
  
 
 
הההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההה
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX

• Subtask 1: 50 / 50
• Subtask 2: 50 / 50