제출 #419293

#제출 시각아이디문제언어결과실행 시간메모리
419293MohamedAhmed04선물상자 (IOI15_boxes)C++14
100 / 100
589 ms239416 KiB
#include <bits/stdc++.h> #include "boxes.h" //#include "grader.cpp" using namespace std ; const int MAX = 1e7 + 5 ; long long pref[MAX] , suff[MAX] ; long long delivery(int n, int k, int L, int p[]) { for(int i = 0 ; i < n ; ++i) { if(i-k >= 0) pref[i] = pref[i-k] ; pref[i] += p[i] + min(p[i] , L - p[i]) ; } for(int i = n-1 ; i >= 0 ; --i) { if(i+k <= n-1) suff[i] = suff[i+k] ; suff[i] += L - p[i] + min(p[i] , L - p[i]) ; } long long ans = suff[0] ; for(int i = 0 ; i < n ; ++i) ans = min(ans , pref[i] + suff[i+1]) ; return ans ; }
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