/*
Editor: Abdelrahman Hossam
Nickname: Blobo2_Blobo2
IOI next year isA :)
*/
#pragma GCC optimize("Ofast,no-stack-protector,unroll-loops,fast-math,O3")
//#pragma GCC target("sse,sse2,sse3,ssse3,sse4,sse4.2,popcnt,abm,mmx,avx2,tune=native")
#pragma GCC optimize("-ffast-math")
#pragma GCC optimize("-funroll-loops")
#pragma GCC optimize("-funroll-all-loops,-fpeel-loops,-funswitch-loops")
#include<bits/stdc++.h>
using namespace std;
#define int long long
#define endl "\n"
#define all(v) v.begin(),v.end()
#define gen(arr,n,nxt) generate(arr,arr+n,nxt)
#define Blobo2_el_7akim_elly_3ayz_yro7_IOI_w_3ayz_yakol_jilaty ios_base::sync_with_stdio(false);cin.tie(0);
const int mo=1e9+7,INF=1e18;
int nxt(){int x;cin>>x;return x;}
int n,sm,big,arr[2001],dp[2001][2001],mid;
int BS(int x){
int s=0,e=n-1;
while(s<=e){
int mid=(s+e)>>1;
if(arr[mid]>x)e=mid-1;
else s=mid+1;
}
return e;
}
int check(int idx=0,int small=0){
if(small>sm)
return -1e9;
if(idx>=n)
return 0;
int &ret = dp[idx][small];
if(ret!=-1)return ret;
int r = arr[idx] + mid;
int idx2 = BS(r);
return ret = max(check(idx2+1,small+1)+(idx2-idx+1),
check(idx+1,small));
}
int mn=1e18;
bool ok(){
memset(dp,-1,sizeof dp);
int x = check();
vector<int>v;
for(int i=0;i<n;i++)
if(!dp[i][sm])
v.push_back(arr[i]);
int now=0,i=0;
for(i;i<v.size();i++){
now++;
int r = v[i] + (mid*2);
int s=0,e=v.size()-1;
while(s<=e){
int mid=(s+e)>>1;
if(v[mid]>=r)e=mid-1;
else s=mid+1;
}
i = e;
}
/*for(int j=0;j<v.size();j++)cout<<v[j]<<' ';
cout<<endl;
cout<<i<<' '<<mid<<' '<<now<<endl<<endl;*/
if(i >= v.size()&&now<=big)
return 1;
else
return 0;
}
signed main(){
Blobo2_el_7akim_elly_3ayz_yro7_IOI_w_3ayz_yakol_jilaty
n=nxt(),sm=nxt(),big=nxt();
if(big+sm>=n){
cout<<1;
return 0;
}
gen(arr,n,nxt);
sort(arr,arr+n);
int s=0,e=1e9;
while(s<=e){
mid=(s+e)>>1;
if(ok()){
mn=min(mn,mid);
e=mid-1;
}
else s=mid+1;
}
cout<<mn;
return 0;
}
Compilation message
watching.cpp: In function 'bool ok()':
watching.cpp:52:9: warning: statement has no effect [-Wunused-value]
52 | for(i;i<v.size();i++){
| ^
watching.cpp:52:12: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
52 | for(i;i<v.size();i++){
| ~^~~~~~~~~
watching.cpp:66:10: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
66 | if(i >= v.size()&&now<=big)
| ~~^~~~~~~~~~~
watching.cpp:46:9: warning: unused variable 'x' [-Wunused-variable]
46 | int x = check();
| ^
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
133 ms |
31644 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
141 ms |
31936 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
