Submission #106039

#	Time	Username	Problem	Language	Result	Execution time	Memory
106039		he_____he	Stove (JOI18_stove)	C++14	100 / 100	22 ms	2944 KiB

stove

#include<bits/stdc++.h>

using namespace std;

typedef long long ll;

int readint(){
	int x=0,f=1; char ch=getchar();
	while(ch<'0'||ch>'9'){if(ch=='-')f=-1;ch=getchar();}
	while(ch>='0'&&ch<='9'){x=x*10+ch-'0';ch=getchar();}
	return x*f;
}

int n,k;
ll a[100005],b[100005];

int main(){
	n=readint(); k=readint()-1;
	for(int i=1;i<=n;i++) a[i]=readint();
	for(int i=1;i<=n-1;i++) b[i]=a[i+1]-a[i]-1;
	sort(b+1,b+n);
	ll sum=a[n]-a[1]+1;
	for(int i=n-1;i>=n-k;i--) sum-=b[i];
	printf("%lld\n",sum);
	return 0;
}

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