Submission #176085

#	Time	Username	Problem	Language	Result	Execution time	Memory
176085		awlintqaa	Stove (JOI18_stove)	C++14	100 / 100	85 ms	3308 KiB

stove

#define fast ios_base::sync_with_stdio(0),cin.tie(0),cout.tie(0)
#include <bits/stdc++.h>
using namespace std;
#define sqr 500
#define mid (l+r)/2
#define pb push_back
#define ppb pop_back
#define fi first
#define se second
#define lb lower_bound
#define ub upper_bound
#define ins insert
#define era erase
#define C continue
#define mem(dp,i) memset(dp,i,sizeof(dp))
#define mset multiset
typedef long long ll;
typedef long double ld;
typedef pair<int,int> pi;
typedef pair<ll,ll> pll;
typedef vector<int> vi;
typedef vector<ll> vll;
typedef vector<pi> vpi;
typedef vector<pll> vpll;
const ll mod=1000000007;//998244353;
const ll inf=1e18*4;
const ld pai=acos(-1);
ll n,k;
ll a[100009];
int main(){
        cin>>n>>k;
        for(int i=0;i<n;i++)cin>>a[i];
        vll v;
        ll sum=1;
        for(int i=1;i<n;i++)v.pb(a[i]-a[i-1]),sum+=a[i]-a[i-1];
        sort(v.begin(),v.end());
        k--;
        ll j=v.size()-1;
        while(k--){
                sum-=v[j--]-1;
        }
        cout<<sum<<endl;
}

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