#include <bits/stdc++.h>
using namespace std;
int n,k;int t;
int arr[100001];
bool check(int mid){
int l = k-1 , r = k+1 , lin = k , rin = k;
int te = t , tel = t , ter = t , suml = 0, sumr = 0;
int minl = 1000000000;
int minr = 1000000000;
while(1){
int mi = 0;
bool ss = 0;
while(l>=0){
int dis = ((arr[l+1]-arr[l])+1)/2;
int tim = (dis+(mid-1))/mid;
if(tel<tim){
break;
}
minl = min(minl,tel-tim);
tel-=tim;tel+=t;
suml+=t-tim;
if(suml>0){
ss = 1;
lin = l;
minr+=suml;
te = tel;
ter += suml;
suml = 0;
minl = 1000000000;
}
l--;
}while(r<n){
int dis = ((arr[r]-arr[r-1])+1)/2;
int tim = (dis+(mid-1))/mid;
if(ter<tim){
break;
}
minr = min(minr,ter-tim);
ter-=tim;
ter+=t;
sumr+=t-tim;
if(sumr>0){
ss = 1;
rin = r;
minl+=sumr;
te = ter;
tel += sumr;
sumr = 0;
minr = 1000000000.0;
}
r++;
}
if(lin==0&&rin==n-1)return 1;
if(l==-1&&r==n&&((minr>=te-suml)||(minl>=te-sumr))){
return 1;
}
if(ss==0)return 0;
}
return 1;
}
int main(){
cin>>n>>k>>t;
k--;
for(int i = 0;i<n;i++)cin>>arr[i];
sort(arr,arr+n);
if(arr[0]==arr[n-1]){
cout<<0<<"\n";
return 0;
}
int l = 1 , r = 1e9 , ans = 0;
while(l<=r){
int mid = (l+r)/2;
if(check(mid)){
r = mid-1;
ans = mid;
}else l = mid+1;
}
cout<<ans;
}
Compilation message
sparklers.cpp: In function 'bool check(int)':
sparklers.cpp:13:13: warning: unused variable 'mi' [-Wunused-variable]
13 | int mi = 0;
| ^~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
0 ms |
212 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
0 ms |
212 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
0 ms |
212 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
