Submission #1293350

#	Time	Username	Problem	Language	Result	Execution time	Memory
1293350		goulthen	Boxes with souvenirs (IOI15_boxes)	C++20	10 / 100	1 ms	956 KiB

boxes

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

#define ll long long
#define rep(i,a,b) for (int i = a; i <= b; i++)
#define per(i,a,b) for (int i = a; i >= b; i--)
#define pb push_back

long long delivery(int N, int K, int L, int p[]) {
    vector<int> np;
    vector<ll> dp(K,0LL), sum(K,0LL);
    vector<ll> dp2(K,0LL), sum2(K,0LL);

    per(i,N-1,0LL) np.pb(p[i]);
    per(i,N-1,0LL) np.pb(L-p[i]);

    rep(i,0,N-1) {
        dp[i%K]+=((i+K)/K)*np[i];
        sum[i%K]+=np[i];
    }

    ll ans = 2*dp[0];
    rep(r,N,2*N-1) {
        int l = (r)%N;
        dp[l%K] -= sum[l%K];
        sum[l%K] -= np[l];

        dp2[r%K]+=np[r]+sum2[r%K];
        sum2[r%K]+=np[r];
        ans = min(ans, 2*(dp[(l+1)%K] + dp2[r%K]));
    }
    if(K==N) ans = min(ans, (ll)L);
    else ans = min(ans, (ll)min(L+2*np[N+K-1],L+2*np[K]));
    return ans;
}

• Subtask 1: 0 / 10
• Subtask 2: 10 / 10
• Subtask 3: 0 / 15
• Subtask 4: 0 / 15
• Subtask 5: 0 / 20
• Subtask 6: 0 / 30