제출 #216805

#제출 시각아이디문제언어결과실행 시간메모리
216805mohamedsobhi777선물상자 (IOI15_boxes)C++14
50 / 100
54 ms13688 KiB
#include <bits/stdc++.h> #include "boxes.h" using namespace std ; const int M_N = 1e5 + 7 ; long long dp1[M_N] , dp2[M_N]; long long delivery(int N, int K, int L, int p[]) { for(int i = 0 ; i < N ;i ++){ long long cost = 2ll * p[i] ; if(i>=K-1){ dp1[i] = (i==K-1?0:dp1[i-K]) + min(cost ,1ll * L ); }else{ dp1[i] = cost; } } for(int i = N-1 ; i >=0 ; i--){ long long cost = 2ll * (L - p[i]) ; if(i < N-K) { dp2[i] = dp2[i+K] + min(cost , 1ll *L) ; }else{ dp2[i] = cost ; } } long long ret = dp2[0] ; for(int i = 0 ; i < N ;i++){ ret = min(ret , dp1[i] + dp2[i+1]) ; } return ret; }
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