Submission #156960

#	Time	Username	Problem	Language	Result	Execution time	Memory
156960		a_player	Stove (JOI18_stove)	C++14	0 / 100	2 ms	376 KiB

stove

#include <bits/stdc++.h>

#define f first
#define s second
#define mp make_pair
#define pb push_back

using namespace std;

typedef long long ll;

ll v[100001];
int N,K;
bool check(ll T){
	if(T==0)return false;
	int k=1;
	ll v0=v[0];
	for(int i=1;i<N;i++)if(v[i]+1LL-v0>T){
		v0=v[i];
		k++;
		}
		
		return k<=K;
	}

int main(){
	cin>>N>>K;
	for(int i=0;i<N;i++)cin>>v[i];
	ll x=-1;
	for(ll b=v[N-1]-v[0]+1LL;b>=1LL;b/=2LL)
	while(!check(x+b))x+=b;
	x++;
	ll v0=v[0];
	ll s=0;
	for(int i=1;i<N;i++)
	if(v[i]+1-v0>x){
		s+=v[i-1]+1-v0;
		v0=v[i];
		}
		s+=v[N-1]+1-v0;
		cout<<s;
	return 0;
}

• Subtask 1: 0 / 20
• Subtask 2: 0 / 30
• Subtask 3: 0 / 50