제출 #89988

#제출 시각아이디문제언어결과실행 시간메모리
89988Retro3014선물상자 (IOI15_boxes)C++17
20 / 100
2 ms424 KiB
#include "boxes.h" #include <algorithm> using namespace std; #define MAX_N 10000000 typedef long long ll; ll costf[MAX_N+1], coste[MAX_N+1]; ll answer; long long delivery(int N, int K, int L, int p[]) { for(int i=0; i<N; i++){ costf[i]=2*(ll)p[i]+(i<K?0:costf[i-K]); } for(int i=N-1; i>=0; i--){ coste[i]=(ll)(L-p[i])*2+(i>=N-K?0:coste[i+K]); } answer=min(costf[N-1], coste[0]); if(K>=N){ answer=min(answer, (ll)L); } for(int i=0; i<N-1; i++){ answer=min(answer, costf[i]+coste[i+1]); if(i+K+1<N){ answer = min(answer, costf[i]+coste[i+K+1]+(ll)L); } } return answer; }
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