#include <bits/stdc++.h>
#include<ext/pb_ds/assoc_container.hpp>
#include<ext/pb_ds/tree_policy.hpp>
using ll = long long;
#define pb push_back
#define F first
#define S second
#define vii vector<int>
#define vl vector<long long>
#define cinv(v) for (auto &it : v) cin >> it;
#define coutv(v) for (auto &it : v) cout<<it<<" ";cout<<endl;
using namespace std;
using namespace __gnu_pbds;
template<class T> using ordset=tree<T,null_type,less<T>,rb_tree_tag,tree_order_statistics_node_update>;
void solve()
{
int x,n,ans=0;
cin>>x>>n;
ans = x;
for(int i=0;i<n;++i)
{
int y;
cin>>y;
ans+=10;
ans-=y;
}
cout<<ans;
}
int main()
{
ios::sync_with_stdio(false);
cin.tie(nullptr);
//int t;cin>>t;while(t--)
solve();
return 0;
}
