939B. Hamster Farm

Dima has a hamsters farm. Soon N hamsters will grow up on it and Dima will sell them in a city nearby.
Hamsters should be transported in boxes. If some box is not completely full, the hamsters in it are bored, that's why each box should be completely full with hamsters.
Dima can buy boxes at a factory. The factory produces boxes of K kinds, boxes of the i-th kind can contain in themselves ai hamsters. Dima can buy any amount of boxes, but he should buy boxes of only one kind to get a wholesale discount.
Of course, Dima would buy boxes in such a way that each box can be completely filled with hamsters and transported to the city. If there is no place for some hamsters, Dima will leave them on the farm.
Find out how many boxes and of which type should Dima buy to transport maximum number of hamsters.
Input
The first line contains two integers N and K (0 ≤ N ≤ 1018, 1 ≤ K ≤ 105) — the number of hamsters that will grow up on Dima's farm and the number of types of boxes that the factory produces.
The second line contains K integers a1, a2, ..., aK (1 ≤ ai ≤ 1018 for all i) — the capacities of boxes.
Output
Output two integers: the type of boxes that Dima should buy and the number of boxes of that type Dima should buy. Types of boxes are numbered from 1 to K in the order they are given in input.
If there are many correct answers, output any of them.
Examples
Input
Copy

19 3
5 4 10

Output

2 4

Input
Copy

28 3
5 6 30

Output

1 5

제목:
n개의hamsters,k종의 상자가 있는데, 각각의 상자는 서로 다른 수량의hamsters를 담을 수 있습니다. 어떤 상자를 몇 개 살 수 있는지 가능한 한 사세요.
hamsters n개를 다 담으면 남길 수 있지만 상자는 반드시 채워야 한다
사고방식: 남은 상자 찾기

#include
using namespace std;
typedef long long ll;
const int N = 1e5+10;
ll arr[N];
int main(){
    ll n,k;
    scanf("%lld%lld",&n,&k);
    for(ll i=1;i<=k;i++)
       scanf("%lld",&arr[i]);
    ll index=0,mint=1e18;
    for(ll i=1;i<=k;i++){
    	if(n%arr[i]