Submission #282303

#	Time	Username	Problem	Language	Result	Execution time	Memory
282303		YJU	Stove (JOI18_stove)	C++14	100 / 100	25 ms	2556 KiB

stove

#include<bits/stdc++.h>
#pragma GCC optimize("unroll-loops,no-stack-protector")
using namespace std;
typedef long long ll;
typedef long double ld;
typedef pair<ll,ll> pll;
const ll MOD=1e9+7;
const ll MOD2=998244353;
const ll N=2e4+5;
const ld pi=3.14159265359;
#define SQ(i) ((i)*(i))
#define REP(i,n) for(ll i=0;i<n;i++)
#define REP1(i,n) for(ll i=1;i<=n;i++)
#define pb push_back
#define mp make_pair
#define X first
#define Y second
#define setp setprecision
#define lwb lower_bound
#define SZ(_a) (ll)_a.size()

ll n,k,lst,x,ans;
vector<ll> v;

int main(){
	ios_base::sync_with_stdio(0);cin.tie(0);
	cin>>n>>k;
	REP(i,n){
		cin>>x;
		if(i)v.pb(x-lst-1);
		lst=x;
	}
	sort(v.begin(),v.end());
	REP(i,SZ(v)-k+1)ans+=v[i];
	cout<<ans+n<<"\n";
	return 0;
}

• Subtask 1: 20 / 20
• Subtask 2: 30 / 30
• Subtask 3: 50 / 50