제출 #305470

#제출 시각아이디문제언어결과실행 시간메모리
305470vipghn2003선물상자 (IOI15_boxes)C++14
100 / 100
916 ms266028 KiB
#include<bits/stdc++.h> using namespace std; long long delivery(int n,int k,int L,int pos[]) { vector<long long>l(n+1),r(n+1); sort(pos,pos+n); int cntl=0; for(int i=0;i<n;i++) { cntl++; if(cntl>=k) l[cntl]=l[cntl-k]+2ll*pos[i]; else l[cntl]=2ll*pos[i]; } int cntr=0; for(int i=n-1;i>=0;i--) { cntr++; if(cntr>=k) r[cntr]=r[cntr-k]+2ll*(L-pos[i]); else r[cntr]=2ll*(L-pos[i]); } long long res=1e18; for(int i=0;i<=n;i++) { res=min(res,l[i]+r[n-i]); if(n-i-k>=0) res=min(res,l[i]+r[n-i-k]+L); } return res; }
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