Submission #678495

#	Time	Username	Problem	Language	Result	Execution time	Memory
678495		penguin133	Boxes with souvenirs (IOI15_boxes)	C++17	100 / 100	515 ms	270576 KiB

boxes

#include <bits/stdc++.h>
using namespace std;

//#define int long long
#define pi pair<int, int>
#define pii pair<int, pi>
#define fi first
#define se second
#ifdef _WIN32
#define getchar_unlocked _getchar_nolock
#endif

long long P[10000005], S[10000005];
long long delivery(int N, int K, int L, int p[]) {
    for(int i=1;i<=K;i++)P[i] = p[i-1] * 2;
    for(int i=K+1;i<=N;i++)P[i] = P[i-K] + p[i-1] * 2;
    for(int i=N;i>=N-K+1;i--)S[i] = (L - p[i-1])*2;
    for(int i=N-K;i>=1;i--)S[i] = S[i+K] + (L - p[i-1]) * 2;
    S[N+1] = 0;
    long long ans = 1e18;
    for(int i=0;i<=N;i++)ans = min(ans, P[i] + S[i+1]);
    for(int i=K;i<=N;i++){
		ans = min(ans, P[i-K] + S[i+1] + L);
	}
	return ans;
}

• Subtask 1: 10 / 10
• Subtask 2: 10 / 10
• Subtask 3: 15 / 15
• Subtask 4: 15 / 15
• Subtask 5: 20 / 20
• Subtask 6: 30 / 30