CF Amr and Music (贪心)

Amr and Music

time limit per test

1 second

memory limit per test

256 megabytes

input

standard input

output

standard output

Amr is a young coder who likes music a lot. He always wanted to learn how to play music but he was busy coding so he got an idea.

Amr has n instruments, it takes ai days to learn i-th instrument. Being busy, Amr dedicated k days to learn how to play the maximum possible number of instruments.

Amr asked for your help to distribute his free days between instruments so that he can achieve his goal.

Input

The first line contains two numbers n, k (1 ≤ n ≤ 100, 0 ≤ k ≤ 10 000), the number of instruments and number of days respectively.

The second line contains n integers ai (1 ≤ ai ≤ 100), representing number of days required to learn the i-th instrument.

Output

In the first line output one integer m representing the maximum number of instruments Amr can learn.

In the second line output m space-separated integers: the indices of instruments to be learnt. You may output indices in any order.

if there are multiple optimal solutions output any. It is not necessary to use all days for studying.

Sample test(s)

input

4 10
4 3 1 2

output

4
1 2 3 4

input

5 6
4 3 1 1 2

output

3
1 3 4

input

1 3
4

output

0




结构体排序，每次选最小。

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

struct    Node
{
    int    day;
    int    num;
};

int    comp(const void * a,const void * b);
int    main(void)
{
    int    n,k;
    int    sum;
    Node    s[105];
    int    ans[105];
    int    box;


    scanf("%d%d",&n,&k);
    for(int i = 0;i < n;i ++)
    {
        scanf("%d",&s[i].day);
        s[i].num = i + 1;
    }
    qsort(s,n,sizeof(Node),comp);

    sum = box = 0;
    for(int i = 0;i < n;i ++,box ++)
    {
        sum += s[i].day;
        if(sum > k)
            break;
        ans[box] = s[i].num;
    }
    printf("%d\n",box);
    for(int i = 0;i < box;i ++)
    {
        printf("%d",ans[i]);
        if(i + 1 < box)
            printf(" ");
    }
    if(box)puts("");

    return    0;
}

int    comp(const void * a,const void * b)
{
    return    (*(Node *)a).day - (*(Node *)b).day;
}