53 lines
1.2 KiB
C++
53 lines
1.2 KiB
C++
#include<iostream>
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#include<algorithm>
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#include<stdlib.h>
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#include<string.h>
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#include<stdio.h>
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#include<math.h>
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#include<string>
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#include<vector>
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#include<queue>
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#include<list>
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using namespace std;
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typedef long long lld;
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typedef unsigned int ud;
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#define INF_MAX 0x3f3f3f3f
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#define eatline() char chch;while((chch=getchar())!='\n')continue;
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#define MemsetMax(a) memset(a,0x3f,sizeof a)
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#define MemsetZero(a) memset(a,0,sizeof a)
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#define MemsetMin(a) memset(a,-1,sizeof a)
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#define MemsetFalse(a) MemsetZero(a)
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#define PQ priority_queue
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#define Q queue
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#define maxn 100005
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#define maxm 1000005
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int c[maxn];
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int Rank[maxm];
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int main()
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{
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int n, m;
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while (scanf("%d%d", &n, &m) != EOF)
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{
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for (int i = 1; i <= n; i++)
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scanf("%d", &c[i]);
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for (int i = 1; i <= m; i++)
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scanf("%d", &Rank[i]);
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sort(Rank + 1, Rank + 1 + m);
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int ans = 0;
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for (int i = 1; i <= m; i++)
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{
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for (int j = 1; j <= Rank[i]; j++)
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{
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if (c[j] > 0)
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{
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c[j]--;
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ans++;
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break;
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}
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}
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}
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printf("%d\n", ans);
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}
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return 0;
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}
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