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Description
Pirates have finished developing the typing software. He called Cathy to test his typing software. She is good at thinking. After testing for several days, she finds that if she types a string by some ways, she will type the key at least. But she has a bad habit that if the caps lock is on, she must turn off it, after she finishes typing. Now she wants to know the smallest times of typing the key to finish typing a string.
Input
The first line is an integer t (t<=100), which is the number of test case in the input file. For each test case, there is only one string which consists of lowercase letter and upper case letter. The length of the string is at most 100.
Output
For each test case, you must output the smallest times of typing the key to finish typing this string.
Sample Input
3
Pirates HDUacm HDUACM
Sample Output
8
8 8
Hint
The string “Pirates”, can type this way, Shift, p, i, r, a, t, e, s, the answer is 8. The string “HDUacm”, can type this way, Caps lock, h, d, u, Caps lock, a, c, m, the answer is 8 The string “HDUACM”, can type this way Caps lock h, d, u, a, c, m, Caps lock, the answer is 8
分析
状态转移方程:
C++库函数isupper(char c) 用来检测当前字符是否为大写字母,如果是大写字母返回true,否则返回false当前字母是大写字母
下一个状态按下了Caps Lock等于 min(当前按下了Caps Lock的状态+输入一个大写字母,当前没有按下Caps Lock的状态+按下Caps Lock+输入一个大写字母)
下一个状态没有按下Caps Lock等于 min(当前按下了Caps Lock的状态+输入一个大写字母+再次按下Caps Lock(复原),当前没有按下Caps Lock的状态+shift+输入一个大写字母)
当前字母是小写字母
下一个状态按下了Caps Lock等于 min(当前按下了Caps Lock的状态+shift+输入一个小写字母,当前没有按下Caps Lock的状态+输入一个小写字母+按下Caps Lock)
下一个状态没有按下Caps Lock等于 min(当前按下了Caps Lock的状态+再次按下Caps Lock(复原)+输入一个小写字母,当前没有按下Caps Lock的状态+输入一个小写字母)
AC
#include#include #include using namespace std;const int maxn=100+5;int dpc[maxn],dp[maxn];char s[maxn];int main(){ int t; cin>>t; while(t--) { scanf("%s",s); int len=strlen(s); dpc[0]=1; dp[0]=0; for(int i=0;i
学如逆水行舟,不进则退
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