/* 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 = 2e5+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 par[N], sz[N], lv[N], rv[N], l[N], r[N], used[N];
set<tut<3>> ss;
int f(int x){ return (par[x] == x ? x : par[x] = f(par[x])); }
void merge(int a, int b){
a = f(a), b = f(b);
if(a == b) return;
if(sz[b] > sz[a]) swap(a, b);
//~ par[b] = a, umin(l[a], l[b]), umax(r[a], r[b]);
//~ umin(lv[a], lv[b]), umax(rv[a], rv[b]);
int ok = 0;
int pp = a;
if(b > a) swap(a, b), ok = 1;
if(lv[b] > 0){
int c = lv[b] - 1;
ss.erase({r[b] - l[f(c)] + 1, f(c), b});
ss.insert({r[a] - l[f(c)] + 1, f(c), pp});
} if(lv[a] < n-1) {
int c = rv[a] + 1;
ss.erase({r[f(c)] - l[a] + 1, a, f(c)});
ss.insert({r[f(c)] - l[b] + 1, pp, f(c)});
} if(ok) swap(a, b);
par[b] = a, umin(l[a], l[b]), umax(r[a], r[b]);
umin(lv[a], lv[b]), umax(rv[a], rv[b]);
sz[a] += sz[b];
}
void solve(int t_case){
cin>>n>>m>>q;
for(int i=0;i<n;i++) cin>>a[i];
sort(a, a+n);
for(int i=0;i<n;i++) par[i] = i, l[i] = r[i] = a[i], sz[i] = 1, lv[i] = rv[i] = i;
for(int i=1;i<n;i++) ss.insert({a[i] - a[i-1] + 1, i - 1, i});
for(int i=0;i<n - (m + q);i++){
int a = (*ss.begin())[1], b = (*ss.begin())[2]; ss.erase(ss.begin());
merge(a, b);
}
vii tmp;
for(int i=0;i<n;i++){
int x = f(i);
if(used[x]) continue;
//~ cout<<l[x]<<" "<<r[x]<<"\n";
used[x] = 1;
tmp.pb(r[x] - l[x] + 1);
}
sort(all(tmp));
for(int i=sz(tmp)-1;i>=max(0ll, sz(tmp)-q);i--) tmp[i] = (tmp[i] + 1) / 2;
for(auto x : tmp) umax(res, x);
cout<<res<<"\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 |
1 ms |
332 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
4 ms |
604 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
