제출 #186009

#제출 시각아이디문제언어결과실행 시간메모리
186009TAISA_선물상자 (IOI15_boxes)C++14
50 / 100
44 ms13860 KiB
#include "boxes.h" #include<bits/stdc++.h> using namespace std; using ll=long long; const ll LINF=(1LL<<60)-1LL; ll ddiv(ll a,ll b){ return a/b+(a%b>0); } long long delivery(int N, int K, int L, int p[]) { ll res=L*ddiv(N,K); if(N>1000){ return 0; } vector<ll> sum(K); for(ll j=N-1;j>=0;j--){ sum[(N-j-1)%K]+=2LL*(L-p[j]); res=min(res,sum[(N-j-1)%K]+L*ddiv(j,K)); } sum.assign(K,0); for(ll i=0;i<N;i++){ sum[i%K]+=2LL*p[i]; res=min(res,sum[i%K]+L*ddiv(N-i-1,K)); vector<ll> sum2(K); for(ll j=N-1;j>=i+1;j--){ sum2[(N-j-1)%K]+=2LL*(L-p[j]); res=min(res,sum[i%K]+sum2[(N-j-1)%K]+L*ddiv(j-i-1,K)); } } return res; }
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