Submission #535292

#	Time	Username	Problem	Language	Result	Execution time	Memory
535292		Biaz	Stove (JOI18_stove)	C++17	100 / 100	58 ms	2824 KiB

stove

#include<bits/stdc++.h>
#define int long long
#define pb push_back
#define ALL(x) x.begin(),x.end()
#define fi first
#define se second
#define ist insert
using namespace std;
typedef long long ll;
const int N=200005;
const int MOD=1000000007;//998244353
const int INF=2147483647;//1700000000000000000

int n,k;
int a[N];
int b[N];
inline void sol(){
    cin >>n>>k;
    for (int i=1;i<=n;i++)
        cin >>a[i];
    for (int i=1;i<n;i++)
        b[i]=a[i+1]-a[i];
    sort(b+1,b+n);
    int ans=n;
    for (int i=1;i<=n-k;i++)
        ans+=b[i]-1;
    cout <<ans<<'\n';
}
signed main(){
    int _=1;
    //cin >>_;
    while (_--) sol();
    return 0;
}

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