Submission #435196

#	Time	Username	Problem	Language	Result	Execution time	Memory
435196		Supersonic	Stove (JOI18_stove)	C++14	100 / 100	34 ms	2380 KiB

stove

#include <bits/stdc++.h>
using namespace std;
#pragma GCC optimize("O3")
bool pc(pair<int,int> a,pair<int,int> b){
	return a.second-a.first<b.second-b.first;
}
int main(){
	ios_base::sync_with_stdio(false);cin.tie(NULL);cout.tie(NULL);
	int n,k;cin>>n>>k;vector<pair<int,int>> v;
	int pv;cin>>pv;
	for(int i=1;i<n;i++){int k;cin>>k;v.push_back({pv,k});pv=k;}
	sort(v.rbegin(),v.rend(),pc);
	//for(auto i:v){cerr<<i.first<<' '<<i.second<<endl;}
	long long s=n,r=n;
	while(r>k){
		int a,b;tie(a,b)=v.back();v.pop_back();r--;
		s+=(long long)b-(a+1);
	}
	cout<<s<<endl;
  return 0;
}

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