/* made by amunduzbaev */
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
#include "bits/stdc++.h"
using namespace std;
using namespace __gnu_pbds;
#define ff first
#define ss second
#define pb push_back
#define mp make_pair
#define ub upper_bound
#define lb lower_bound
#define sz(x) (int)x.size()
#define all(x) x.begin(), x.end()
#define rall(x) x.rbegin(),x.rend()
#define NeedForSpeed ios::sync_with_stdio(0);cin.tie(0);cout.tie(0);
#define vv vector
#define mem(arr, v) memset(arr, v, sizeof arr)
#define int long long
typedef long long ll;
typedef long double ld;
typedef pair<int, int> pii;
typedef vector<int> vii;
typedef vector<pii> vpii;
template<class T> bool umin(T& a, const T& b) { return a > b ? a = b, true : false; }
template<class T> bool umax(T& a, const T& b) { return a < b ? a = b, true : false; }
template<int sz> using tut = array<int, sz>;
void usaco(string s) { freopen((s+".in").c_str(),"r",stdin);
freopen((s+".out").c_str(),"w",stdout); NeedForSpeed }
template<class T> using oset = tree<T,
null_type, less_equal<T>, rb_tree_tag,
tree_order_statistics_node_update>;
const int N = 2e3+5;
const int mod = 1e9+7;
const ll inf = 1e18;
const ld Pi = acos(-1);
#define MULTI 0
int n, m, k, s, t, q, ans, res, a[N];
int dp[N][N];
bool check(int w){
mem(dp, -1);
for(int i=1;i<=q;i++) dp[1][i] = m;
dp[1][0] = m - 1;
for(int l=0;l<=q;l++){
for(int i=2;i<=n;i++){
for(int j=i-1;j>0;j--){
if(l > 0 && a[i] - a[j] <= 2 * w) umax(dp[i][l], dp[j-1][l-1]);
if(a[i] - a[j] <= w) umax(dp[i][l], dp[j-1][l]-1);
}
}
}
//~ cout<<w<<"\n";
//~ for(int j=0;j<=q;j++){
//~ for(int i=1;i<=n;i++){
//~ cout<<dp[i][j]<<" ";
//~ } cout<<"\n";
//~ } cout<<"\n";
for(int j=1;j<=q;j++) if(dp[n][j] >= 0) return 1;
return 0;
}
void solve(int t_case){
cin>>n>>m>>q;
for(int i=1;i<=n;i++) cin>>a[i];
if(m + q > n) { cout<<1<<"\n"; return; }
sort(a+1, a+n+1);
a[0] = a[1];
int l = 1, r = mod;
while(l + 1 < r){
int m = (l + r)>>1;
if(check(m)) r = m;
else l = m;
} if(!check(l)) l = r;
cout<<l<<"\n";
}
signed main(){
NeedForSpeed
if(MULTI){
int t; cin>>t;
for(int t_case = 1; t_case <= t; t_case++) solve(t_case);
} else solve(1);
return 0;
}
Compilation message
watching.cpp: In function 'void usaco(std::string)':
watching.cpp:32:31: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
32 | void usaco(string s) { freopen((s+".in").c_str(),"r",stdin);
| ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
watching.cpp:33:9: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
33 | freopen((s+".out").c_str(),"w",stdout); NeedForSpeed }
| ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
132 ms |
31692 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
633 ms |
31780 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
