Submission #712515

#	Time	Username	Problem	Language	Result	Execution time	Memory
712515		Username4132	Boxes with souvenirs (IOI15_boxes)	C++14	0 / 100	1 ms	340 KiB

boxes

#include "boxes.h"
#include<iostream>
using namespace std;
using ll = long long;
#define forn(i, n) for(int i=0; i<(int)n; ++i)

const int MAXN=10000010;
int le[MAXN], ri[MAXN], cnl=0, cnr=0;
ll dpl[MAXN], dpr[MAXN];

long long delivery(int N, int K, int L, int p[]) {

    forn(i, N){
        if(p[i]<(L>>1)) le[cnl++]=p[i];
        else ri[cnr++]=L-p[i];
    }

    forn(i, cnl){
        if(i<K) dpl[i]=le[i];
        else dpl[i]=dpl[i-K]+le[i];
    }
    forn(i, cnr){
        if(i<K) dpr[i]=ri[i];
        else dpr[i]=dpr[i-K]+ri[i];
    }

    ll ans = ((cnl? dpl[cnl-1] : 0)+ (cnr? dpr[cnr-1] : 0))<<1;
    forn(i, K+1){
        int il=cnl-1-i, ir=cnr-1-K+i;
        ans = min(ans, (((il<0? 0 : dpl[il]) + (ir<0? 0 : dpr[ir]))<<1) + L);
    }

    return ans;
}

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