제출 #747955

#제출 시각아이디문제언어결과실행 시간메모리
747955Abrar_Al_Samit선물상자 (IOI15_boxes)C++17
10 / 100
1 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]; 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]); } a[n+1] = 2e9 + 10; for(int i=1; i<=n+1; ++i) { dp[i] = INF; } dp[1] = c[1]; //dp is increasing //dp[i] = # of seconds to fill [1...i] with k-1 gifts remaining for(int i=2; i<=n; ++i) { for(int j=i-1; j>0 && i-j<=k; --j) { dp[i] = min(dp[i], dp[j] + min(a[i-1]-a[j], a[j+1]-a[j])); } dp[i] += c[i-1] + c[i]; } long long ans = INF; for(int i=1; i<=n; ++i) { if(i+k-1>=n) { ans = min(ans, dp[i] + L-a[i]); if(i==n) ans = min(ans, dp[i] + a[i]); } } return ans; }
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