Submission #217839

#	Time	Username	Problem	Language	Result	Execution time	Memory
217839		DavidDamian	선물상자 (IOI15_boxes)	C++11	20 / 100	5 ms	384 KiB

boxes

#include "boxes.h"
#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
long long delivery(int N, int K, int L, int p[]) {
    ll total=0;
    int remaining=K;
    int a=0,b=N-1;
    int last=-1;
    while(a<=b){
        ll distA;
        ll distB;
        int selected=0;
        if(remaining==K){
            distA=min(p[a],L-p[a]);
            distB=min(p[b],L-p[b]);
            if(distA<=distB) selected=a;
            else selected=b;
            total+=(selected==a)? distA : distB;
        }
        else{
            distA=min(abs(p[a]-p[last]),L-abs(p[a]-p[last]));
            distB=min(abs(p[b]-p[last]),L-abs(p[b]-p[last]));
            if(distA<=distB) selected=a;
            else selected=b;
            total+=(selected==a)? distA : distB;
        }
        remaining--;
        if(remaining==0 || a==b){
            distA=min(p[a],L-p[a]);
            distB=min(p[b],L-p[b]);
            total+=(selected==a)? distA : distB;
            remaining=K;
        }
        last=selected;
        if(selected==a) a++;
        else b--;
    }
    return total;
}

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