제출 #156996

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
156996		HungAnhGoldIBO2020	Cake 3 (JOI19_cake3)	C++14	0 / 100	2 ms	376 KiB

cake3

#include<iostream>
#include<algorithm>
#define int long long
using namespace std;
const int N=2e5+2;
const int inf=1e18+2;
pair<int,int> val[N],dep[N];
int sum[N];
signed main(){
	ios::sync_with_stdio(0);
	cin.tie(0);
	int n,i,j,k,ans=-inf,max1=-inf,m;
	cin>>n>>m;
	for(i=1;i<=n;i++){
		cin>>val[i].first>>val[i].second;
	}
	sort(val+1,val+1+n,[&](pair<int,int> x,pair<int,int> y){
		return x.second<y.second;	
	});
	for(i=1;i<=n;i++){
		sum[i]=sum[i-1]+val[i].first;
		if(i>=m){
			max1=max(max1,2*val[i-m+1].second+val[i-m+1].first);
			ans=max(ans,max1+sum[i]-sum[i-m+1]-2*val[i].second);
//			cout<<max1+sum[i]-sum[i-m+1]-2*val[i].second<<endl;
		}
	}
	cout<<ans;
}

컴파일 시 표준 에러 (stderr) 메시지

cake3.cpp: In function 'int main()':
cake3.cpp:12:10: warning: unused variable 'j' [-Wunused-variable]
  int n,i,j,k,ans=-inf,max1=-inf,m;
          ^
cake3.cpp:12:12: warning: unused variable 'k' [-Wunused-variable]
  int n,i,j,k,ans=-inf,max1=-inf,m;
            ^

• Subtask 1: 0 / 5
• Subtask 2: 0 / 19
• Subtask 3: 0 / 76