#include "bits/stdc++.h"
using namespace std;
#define ar array
#define int long long
const int inf = 1e9 + 5;
signed main(){
ios::sync_with_stdio(0); cin.tie(0);
int n, k, t; cin>>n>>k>>t;
vector<int> a(n), d(n);
for(int i=0;i<n;i++) cin>>a[i], a[i] *= 2;
for(int i=1;i<n;i++){
d[i] = a[i] - a[i-1];
}
k--;
auto check = [&](int s){
vector<int> b(n);
for(int i=0;i<n;i++) b[i] = a[i] / 2 - i * s * t;
vector<vector<int>> dp(n, vector<int>(n, 0));
dp[k][k] = 1;
for(int len=0;len<n;len++){
for(int i=0;i+len<n;i++){
int j=i+len;
if(j+1<n && b[i] >= b[j+1]){
dp[i][j+1] |= dp[i][j];
} if(i && b[i-1] >= b[j]){
dp[i-1][j] |= dp[i][j];
}
}
}
return dp[0][n-1];
};
int l = 0, r = 2 * inf;
while(l < r){
int m = (l + r) >> 1;
if(check(m)) r = m;
else l = m + 1;
}
cout<<(l+1) / 2<<"\n";
}
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1 ms |
212 KB |
Output is correct |
2 |
Correct |
1 ms |
316 KB |
Output is correct |
3 |
Correct |
1 ms |
212 KB |
Output is correct |
4 |
Correct |
1 ms |
212 KB |
Output is correct |
5 |
Correct |
1 ms |
212 KB |
Output is correct |
6 |
Correct |
1 ms |
212 KB |
Output is correct |
7 |
Correct |
1 ms |
212 KB |
Output is correct |
8 |
Correct |
1 ms |
212 KB |
Output is correct |
9 |
Correct |
1 ms |
324 KB |
Output is correct |
10 |
Correct |
1 ms |
212 KB |
Output is correct |
11 |
Correct |
1 ms |
212 KB |
Output is correct |
12 |
Correct |
1 ms |
212 KB |
Output is correct |
13 |
Correct |
1 ms |
296 KB |
Output is correct |
14 |
Correct |
1 ms |
324 KB |
Output is correct |
15 |
Correct |
1 ms |
212 KB |
Output is correct |
16 |
Correct |
0 ms |
316 KB |
Output is correct |
17 |
Correct |
1 ms |
212 KB |
Output is correct |
18 |
Correct |
1 ms |
320 KB |
Output is correct |
19 |
Correct |
1 ms |
212 KB |
Output is correct |
20 |
Correct |
1 ms |
212 KB |
Output is correct |
21 |
Correct |
1 ms |
212 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1 ms |
212 KB |
Output is correct |
2 |
Correct |
1 ms |
316 KB |
Output is correct |
3 |
Correct |
1 ms |
212 KB |
Output is correct |
4 |
Correct |
1 ms |
212 KB |
Output is correct |
5 |
Correct |
1 ms |
212 KB |
Output is correct |
6 |
Correct |
1 ms |
212 KB |
Output is correct |
7 |
Correct |
1 ms |
212 KB |
Output is correct |
8 |
Correct |
1 ms |
212 KB |
Output is correct |
9 |
Correct |
1 ms |
324 KB |
Output is correct |
10 |
Correct |
1 ms |
212 KB |
Output is correct |
11 |
Correct |
1 ms |
212 KB |
Output is correct |
12 |
Correct |
1 ms |
212 KB |
Output is correct |
13 |
Correct |
1 ms |
296 KB |
Output is correct |
14 |
Correct |
1 ms |
324 KB |
Output is correct |
15 |
Correct |
1 ms |
212 KB |
Output is correct |
16 |
Correct |
0 ms |
316 KB |
Output is correct |
17 |
Correct |
1 ms |
212 KB |
Output is correct |
18 |
Correct |
1 ms |
320 KB |
Output is correct |
19 |
Correct |
1 ms |
212 KB |
Output is correct |
20 |
Correct |
1 ms |
212 KB |
Output is correct |
21 |
Correct |
1 ms |
212 KB |
Output is correct |
22 |
Correct |
109 ms |
4676 KB |
Output is correct |
23 |
Correct |
58 ms |
2912 KB |
Output is correct |
24 |
Correct |
96 ms |
4772 KB |
Output is correct |
25 |
Correct |
182 ms |
8300 KB |
Output is correct |
26 |
Correct |
155 ms |
8260 KB |
Output is correct |
27 |
Correct |
189 ms |
8292 KB |
Output is correct |
28 |
Correct |
194 ms |
8516 KB |
Output is correct |
29 |
Correct |
184 ms |
8284 KB |
Output is correct |
30 |
Correct |
203 ms |
8288 KB |
Output is correct |
31 |
Correct |
185 ms |
8292 KB |
Output is correct |
32 |
Correct |
163 ms |
8320 KB |
Output is correct |
33 |
Correct |
188 ms |
8492 KB |
Output is correct |
34 |
Correct |
203 ms |
8288 KB |
Output is correct |
35 |
Correct |
165 ms |
8392 KB |
Output is correct |
36 |
Correct |
180 ms |
8276 KB |
Output is correct |
37 |
Correct |
212 ms |
8284 KB |
Output is correct |
38 |
Correct |
188 ms |
8320 KB |
Output is correct |
39 |
Correct |
189 ms |
8252 KB |
Output is correct |
40 |
Correct |
226 ms |
8400 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1 ms |
212 KB |
Output is correct |
2 |
Correct |
1 ms |
316 KB |
Output is correct |
3 |
Correct |
1 ms |
212 KB |
Output is correct |
4 |
Correct |
1 ms |
212 KB |
Output is correct |
5 |
Correct |
1 ms |
212 KB |
Output is correct |
6 |
Correct |
1 ms |
212 KB |
Output is correct |
7 |
Correct |
1 ms |
212 KB |
Output is correct |
8 |
Correct |
1 ms |
212 KB |
Output is correct |
9 |
Correct |
1 ms |
324 KB |
Output is correct |
10 |
Correct |
1 ms |
212 KB |
Output is correct |
11 |
Correct |
1 ms |
212 KB |
Output is correct |
12 |
Correct |
1 ms |
212 KB |
Output is correct |
13 |
Correct |
1 ms |
296 KB |
Output is correct |
14 |
Correct |
1 ms |
324 KB |
Output is correct |
15 |
Correct |
1 ms |
212 KB |
Output is correct |
16 |
Correct |
0 ms |
316 KB |
Output is correct |
17 |
Correct |
1 ms |
212 KB |
Output is correct |
18 |
Correct |
1 ms |
320 KB |
Output is correct |
19 |
Correct |
1 ms |
212 KB |
Output is correct |
20 |
Correct |
1 ms |
212 KB |
Output is correct |
21 |
Correct |
1 ms |
212 KB |
Output is correct |
22 |
Correct |
109 ms |
4676 KB |
Output is correct |
23 |
Correct |
58 ms |
2912 KB |
Output is correct |
24 |
Correct |
96 ms |
4772 KB |
Output is correct |
25 |
Correct |
182 ms |
8300 KB |
Output is correct |
26 |
Correct |
155 ms |
8260 KB |
Output is correct |
27 |
Correct |
189 ms |
8292 KB |
Output is correct |
28 |
Correct |
194 ms |
8516 KB |
Output is correct |
29 |
Correct |
184 ms |
8284 KB |
Output is correct |
30 |
Correct |
203 ms |
8288 KB |
Output is correct |
31 |
Correct |
185 ms |
8292 KB |
Output is correct |
32 |
Correct |
163 ms |
8320 KB |
Output is correct |
33 |
Correct |
188 ms |
8492 KB |
Output is correct |
34 |
Correct |
203 ms |
8288 KB |
Output is correct |
35 |
Correct |
165 ms |
8392 KB |
Output is correct |
36 |
Correct |
180 ms |
8276 KB |
Output is correct |
37 |
Correct |
212 ms |
8284 KB |
Output is correct |
38 |
Correct |
188 ms |
8320 KB |
Output is correct |
39 |
Correct |
189 ms |
8252 KB |
Output is correct |
40 |
Correct |
226 ms |
8400 KB |
Output is correct |
41 |
Runtime error |
116 ms |
262144 KB |
Execution killed with signal 9 |
42 |
Halted |
0 ms |
0 KB |
- |