제출 #639939

#제출 시각아이디문제언어결과실행 시간메모리
639939piOOE선물상자 (IOI15_boxes)C++17
100 / 100
458 ms196772 KiB
#include "boxes.h" #include <vector> using namespace std; long long delivery(int n, int k, int l, int p[]) { vector<long long> pref(n + 1), suf(n + 1); for (int i = 1; i <= n; ++i) { pref[i] = pref[max(0, i - k)] + p[i - 1] + min(p[i - 1], l - p[i - 1]); } long long ans = pref[n]; for (int i = n - 1; i > -1; --i) { suf[i] = suf[min(n, i + k)] + (l - p[i]) + min(p[i], l - p[i]); ans = min(ans, pref[i] + suf[i]); } return ans; }
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