Problem:
Score : 200 points

Problem Statement

A shop sells N kinds of fruits, Fruit 1, \ldots, N, at prices of p_1, \ldots, p_N yen per item, respectively. (Yen is the currency of Japan.)

Here, we will choose K kinds of fruits and buy one of each chosen kind. Find the minimum possible total price of those fruits.

Constraints

1 \leq K \leq N \leq 1000

1 \leq p_i \leq 1000

All values in input are integers.

Input

Input is given from Standard Input in the following format:

N K
p_1 p_2 \ldots p_N

Output

Print an integer representing the minimum possible total price of fruits.

Sample Input 1

5 3
50 100 80 120 80

Sample Output 1

210

This shop sells Fruit 1, 2, 3, 4, and 5 for 50 yen, 100 yen, 80 yen, 120 yen, and 80 yen, respectively.

The minimum total price for three kinds of fruits is 50 + 80 + 80 = 210 yen when choosing Fruit 1, 3, and 5.

Sample Input 2

1 1
1000

Sample Output 2

1000

Solution in C++ (GCC 9.2.1) (judge verdict: Accepted)

#pragma GCC optimize("Ofast")
#pragma GCC target("avx2")
#include <bits/stdc++.h>
#include <ext/pb_ds/tree_policy.hpp>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/rope>

using namespace std;
using namespace __gnu_pbds;
using namespace __gnu_cxx;
//change null_type here for map/set
typedef tree<int,null_type,less<int>,rb_tree_tag,
            tree_order_statistics_node_update> indexed_set;
typedef long long int  ll;
#define fast ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0)
#define mem(a,b) memset(a,b,sizeof(a))
#define pii pair<int,int>
#define F first
#define S second

template<class T>inline bool read(T &x){
    int c=getchar();int sgn=1;
    while(~c&&c<'0'||c>'9'){if(c=='-')sgn=-1;c=getchar();}
    for(x=0;~c&&'0'<=c&&c<='9';c=getchar())x=x*10+c-'0';
    x*=sgn; return ~c;
}
///START HERE
///indexed_set pbd;
//pbd.insert()
//auto x = pbd.find_by_order(2);
//int od=pbd.order_of_key(7)
///rope<int> rp;
//rp.push_back()
//RandomAccess like vector
//mutable_begin, mutable_end()

int main(){
    ///read()+printf
    //freopen("input.txt","r",stdin);
    //freopen("output.txt","w",stdout);
    //fast;
    int n,k;
    cin>>n>>k;
    int ar[n];
    for(int i=0;i<n;i++){
        cin>>ar[i];
    }
    sort(ar,ar+n);
    int s=0;
    for(int i=0;i<k;i++){
        s+=ar[i];
    }
    cout<<s<<endl;

    return 0;
}