check if an array is sub-array of another using hashing

#include <iostream>
#include<map>
using namespace std;

int main() {
    int a[100],b[100],n,m,i,j=1;
    map<int ,int>m1;
    cin>>n>>m;
    for(i=0;i<n;i++)
       cin>>a[i];
    for(i=0;i<m;i++)
       cin>>b[i];
    for(i=0;i<n;i++)
      m1[a[i]]=i;
    for(i=0;i<m;i++)
      {
          if(m1.find(b[i])==m1.end())
            {
                j=0;
                break;
            }
          
          
          
      }
      if(j==0)
        cout<<"no";
      else
      cout<<"yes";
    
    return 0;
}