Submission #5886

#	Time	Username	Problem	Language	Result	Execution time	Memory
5886		baneling100	전봇대 (KOI13_pole)	C++98	52 / 100	28 ms	2260 KiB

pole

#include <stdio.h>
#include <stdlib.h>
#include <algorithm>

using namespace std;

pair <int,int> y[100000];
int N, x[100000], Hab;
long long Ans;

void input(void)
{
    int i;

    scanf("%d",&N);
    for(i=0 ; i<N ; i++)
    {
        scanf("%d",&x[i]);
        if(i)
            y[i]=make_pair(x[i]/i,i);
    }
    Hab=N*(N-1)/2;
    Hab/=2;
    sort(y+1,y+N);
}

void process(void)
{
    int i, s=0, v;
    long long temp=0;

    for(i=1 ; i<N ; i++)
    {
        s+=y[i].second;
        if(Hab<=s)
        {
            v=i;
            break;
        }
    }
    for(i=1 ; i<N ; i++)
    {
        Ans+=abs((long long)i*y[v].first-x[i]);
        temp+=abs((long long)i*(y[v].first+1)-x[i]);
    }
    if(Ans>temp)
        Ans=temp;
}

void output(void)
{
    printf("%lld",Ans);
}

int main(void)
{
    input();
    process();
    output();

    return 0;
}

• Subtask 1: 0 / 11
• Subtask 2: 21 / 21
• Subtask 3: 31 / 31
• Subtask 4: 0 / 37