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WA好几次,才发现不是变换次数最多的拿的apple多#include <iostream>
#include<cstdio>
#include<algorithm>
#include<string.h>
using namespace std;
int t,w,a[10005],dp[55][2];
int main()
{
while(scanf("%d%d",&t,&w)!=EOF)
{
int p=0,m=0;
memset(dp,0,sizeof(dp));
for(int i=0;i<t;i++)
{
scanf("%d",&a[i]);
a[i]--;
for(int j=0;j<=p;j++)
{
dp[j][a[i]]++;
if(dp[j][a[i]]>m)
m=dp[j][a[i]];
if(dp[j+1][a[i]]<dp[j][!a[i]])
{
dp[j+1][a[i]]=dp[j][!a[i]];
if(j==p&&p<w)
p++;
}
}
}
printf("%d\n",m);
}
return 0;
}
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