1048 Find Coins (25 分)【难度: 一般 / 知识点: 哈希表】

https://pintia.cn/problem-sets/994805342720868352/problems/994805432256675840

#include
using namespace std;
const int N=1e5+10;
mapmp;
int a[N],n,m;
int main(void)
{
    cin>>n>>m;
    for(int i=0;i>a[i],mp[a[i]]++;
    sort(a,a+n);
    for(int i=0;i=2)
        {
            cout<