제출 #445129

#제출 시각아이디문제언어결과실행 시간메모리
445129fuad27선물상자 (IOI15_boxes)C++14
0 / 100
1 ms204 KiB
#include<bits/stdc++.h> using namespace std; long long delivery(int n, int k, int l, int p[]) { long long pref[n], suf[n]; long long ans = min(suf[0], pref[n-1]); for(int i = 0;i<n;i++) { if(i >= k)pref[i] = pref[i-k] + min(p[i]*2, l); else pref[i] = min(p[i]*2, l); } for(int i = n - 1;i>=0;i--) { if(n - i - 1 >= k) { suf[i] = min(l, 2*(l - p[i])) + suf[i+k]; } else { suf[i] = min(l, 2*(l - p[i])); } } for(int i = 0;i<n-1;i++) { ans = min(ans, pref[i]+suf[i+1]); } return ans; }
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