제출 #113691

#제출 시각아이디문제언어결과실행 시간메모리
113691wilwxk선물상자 (IOI15_boxes)C++11
100 / 100
792 ms333244 KiB
#include "boxes.h" #include <bits/stdc++.h> using namespace std; typedef long long ll; const int MAXN=1e7+5; int n, k, x; int v[MAXN]; ll pre[MAXN], pos[MAXN]; long long delivery(int N, int K, int L, int p[]) { n=N; k=K; x=L; for(int i=1; i<=n; i++) v[i]=p[i-1]; sort(v+1, v+1+n); for(int i=1; i<=n; i++) { ll volta=min(v[i], x-v[i]); pre[i]=volta+v[i]; pre[i]+= i-k>=0 ? pre[i-k] : 0; } for(int i=n; i>=1; i--) { ll volta=min(v[i], x-v[i]); pos[i]=volta+(x-v[i]); pos[i]+= i+k<=n ? pos[i+k] : 0; } ll respf=x; respf*=n; for(int i=0; i<=n; i++) respf=min(respf, (ll)pre[i]+pos[i+1]); return respf; }
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