#include <bits/stdc++.h> using namespace std; long long a[100001],b[100001]; int hv[100001]; int danhdau[100]; int n,m; int kq=0; void kt() { long long tong=0; int i2=1; for (int i=1;i<=m;i++) { tong=tong+b[hv[i]]; if (i2==n+1) { kq=1; return; } if (tong>a[i2]) return; if (tong==a[i2]) { tong=0; a[i2]++; } } if (i2==n+1) kq=1; return; } void kk (int i) { if (i==m+1) { kt(); return; } // int mid=(l+r)>>1; for (int i2=1;i2<=m;i2++) { if (!danhdau[i2]) { hv[i]=i2; danhdau[i2]=1; kk(i+1); danhdau[i2]=0; } } } signed main () { ios_base::sync_with_stdio(0); cin.tie(NULL); cout.tie(NULL); cin >> n >> m; for (int i=1;i<=n;i++) { cin >> a[i]; } for (int i=1;i<=m;i++) cin >> b[i]; kk(1); if (kq) cout << "YES" << '\n'; else cout << "NO" << '\n'; }