Submission #860294

#	Time	Username	Problem	Language	Result	Execution time	Memory
860294		sunwukong123	Boxes with souvenirs (IOI15_boxes)	C++14	100 / 100	417 ms	297760 KiB

boxes

#include "boxes.h"
#include <bits/stdc++.h>
using namespace std;
void debug_out() {cerr<<endl;}
template <typename Head, typename... Tail>
void debug_out(Head _H, Tail... _T) {cerr<<" "<<to_string(_H);debug_out(_T...);}
#define debug(...) cerr<<"["<<#__VA_ARGS__<<"]:",debug_out(__VA_ARGS__)
const int MAXN = 20000005;
const int inf=1000000500ll;
const long long oo =1000000000000000500ll;
const int MOD = (int)1e9 + 7;
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
typedef pair<int,int> pi; 
long long dp1[MAXN];
long long dp2[MAXN];
long long delivery(int n, int K, int L, int p[]) {
    for(int i=1;i<=n;i++){
        if(i>=K)dp1[i]=dp1[i-K]+2*p[i-1];
        else dp1[i]=2*p[i-1];
    }
    for(int i=n;i>=1;i--){
        int diff=n-i+1;
        if(diff>=K)dp2[i]=dp2[i+K]+2*(L-p[i-1]);
        else dp2[i]=2*(L-p[i-1]);
    }
    

    long long ans=min(dp1[n],dp2[1]);
    for(int i=1;i<=n;i++){
        ans=min(ans,dp1[i]+dp2[i+1]);
    }
    for(int i=0;i<=n;i++){
        ans=min(ans,dp1[i]+(long long)L+dp2[i+K+1]);
    }
    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