hdu6212 Zuma(区间dp)

#pragma GCC optimize(2)
#include <bits/stdc++.h>
#define ll long long
#define ls(i)   i<<1
#define rs(i)   i<<1|1
using namespace std;
const int N = 200+10;
char s[N];
int dp[N][N],a[N],n;
int dfs(int i,int j)
{
    if(dp[i][j]>=0)
        return dp[i][j];
    if(i==j)
        return dp[i][j]=3-a[i];
    dp[i][j]=2*n;
    for(int k=i;k<j;k++)
        dp[i][j]=min(dp[i][j],dfs(i,k)+dfs(k+1,j));
    if((j-i)%2==0)
    {
        dp[i][j]=min(dp[i][j],dfs(i+1,j-1)+(a[i]+a[j]==2));
        if(a[i]+a[j]<4)
        {
             for(int k=i+2;k<j;k+=2)
            {
                if(a[k]==1)
                {
                    dp[i][j]=min(dp[i][j],dfs(i+1,k-1)+dfs(k+1,j-1));
                }
            }
        }

    }
    return dp[i][j];
}
int main(){
    int T;
    cin>>T;
    int kase=0;
    while(T--)
    {
        scanf("%s",s+1);
        n=strlen(s+1);
        int m=0;
        for(int i=1;i<=n;i++)
        {
            if(s[i]!=s[i-1])
                a[++m]=1;
            else
                a[m]++;
        }
        memset(dp,-1,sizeof(dp));
        printf("Case #%d: %d
",++kase,dfs(1,m));
    }
    return 0;
}