제출 #747968

#제출 시각아이디문제언어결과실행 시간메모리
747968Abrar_Al_Samit선물상자 (IOI15_boxes)C++17
20 / 100
3 ms312 KiB
#include <bits/stdc++.h> #include "boxes.h" using namespace std; const int nax = 1e3 + 3; const long long INF = 1e18; long long dp[nax]; int n, k, L; int a[nax]; int c[nax]; int get(int i, int j) { if(i==j) return 0; return min(a[j]-a[i], c[i]+c[i+1]+a[j]-a[i+1]); } long long delivery(int N, int K, int l, int p[]) { n = N, k = K, L = l; for(int i=1; i<=n; ++i) { a[i] = p[i-1]; c[i] = min(a[i], L-a[i]); } for(int i=1; i<=n+1; ++i) { dp[i] = INF; } dp[1] = c[1]; for(int i=1; i<=n; ++i) { for(int j=0; j<k && i+j+1<=n; ++j) { dp[i+j+1] = min(dp[i+j+1], dp[i] + get(i, i+j) + c[i+j] + c[i+j+1]); } } long long ans = INF; for(int i=1; i<=n; ++i) { if(i+k-1>=n) { ans = min(ans, L-a[i]+dp[i]); if(a[i]==a[n]) ans = min(ans, a[i]+dp[i]); } } return ans; }
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