将金币状压，然后就没多说的了。

#include <iostream>
#include <cstdio>
#include <cstring>
#include <algorithm>
#include <cmath>
#define R(a,b,c) for(register int  a = (b); a <= (c); ++ a)
#define nR(a,b,c) for(register int  a = (b); a >= (c); -- a)
#define Max(a,b) ((a) > (b) ? (a) : (b))
#define Min(a,b) ((a) < (b) ? (a) : (b))
#define Fill(a,b) memset(a, b, sizeof(a))
#define Abs(a) ((a) < 0 ? -(a) : (a))
#define Swap(a,b) a^=b^=a^=b
#define ll long long//#define ON_DEBUG#ifdef ON_DEBUG#define D_e_Line printf("\n\n----------\n\n")
#define D_e(x)  cout << #x << " = " << x << endl
#define Pause() system("pause")
#define FileOpen() freopen("in.txt","r",stdin);#else#define D_e_Line ;
#define D_e(x)  ;
#define Pause() ;
#define FileOpen() ;#endifstruct ios{template<typename ATP>ios& operator >> (ATP &x){x = 0; int f = 1; char c;for(c = getchar(); c < '0' || c > '9'; c = getchar()) if(c == '-')  f = -1;while(c >= '0' && c <= '9') x = x * 10 + (c ^ '0'), c = getchar();x*= f;return *this;}
}io;
using namespace std;int a[100007], sum[100007], coin[17];
int bin[17];
int f[(1 << 16)+7];
int main(){FileOpen();int m, n;io >> m >> n;int totalMoney = 0;R(i,1,m){io >> coin[i];totalMoney += coin[i];}R(i,1,n){io >> a[i];sum[i] += sum[i - 1] + a[i];}bin[1] = 1;R(i,2,m) bin[i] = bin[i - 1] << 1;int maxx = (1 << m) - 1;R(i,0,maxx){R(j,1,m){if(i & bin[j]){int tmp = upper_bound(sum + 1, sum + n + 1, sum[f[i ^ bin[j]]] + coin[j]) - sum;f[i] = Max(f[i], tmp - 1);}}}int ans = -1;R(i,0,maxx){if(f[i] == n){int totalCost = 0;R(j,1,m){if(i & bin[j]){totalCost += coin[j];}}ans = Max(ans, totalMoney - totalCost);}}if(ans < 0)printf("-1");elseprintf("%d", ans);return 0;
}