hdoj2577【多种状态】（简单DP）

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#include <stdio.h>
#include <iostream>
#include <sstream>
#include <string.h>
#include <math.h>
#include<stdlib.h>
#include <queue>
#include <set>
#include <algorithm>
using namespace std;
//DP,两种状态，lock，notlock的两种状态；
int min(int a,int b)
{
    return a<b?a:b;
}
#define N 110
int main()
{
    int t,i;
    int lock[N];
    int notlock[N];
    char s[N];
    scanf("%d",&t);
    while(t--)
    {
        scanf("%s",s);
        int n=strlen(s);
        if(s[0]>='A'&&s[0]<='Z')
        {
            notlock[0]=2;
            lock[0]=2;
        }
        else
        {
            notlock[0]=1;
            lock[0]=2;
        }
        for(i=1;i<n;i++)
        {
            if(s[i]>='A'&&s[i]<='Z')
            {
                lock[i]=min(lock[i-1]+1,notlock[i-1]+2);
                notlock[i]=min(lock[i-1]+2,notlock[i-1]+2);
            }
            else
            {
                lock[i]=min(notlock[i-1]+2,lock[i-1]+2);
                notlock[i]=min(notlock[i-1]+1,lock[i-1]+2);
            }
        }
        int q=min(lock[n-1]+1,notlock[n-1]);
        printf("%d\n",q);
    }
    return 0;
}

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