Lweb and String
Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 65536/65536 K (Java/Others)
Total Submission(s): 261 Accepted Submission(s): 174
Oneday, he decided to transform this string to a new sequence.
You need help him determine this transformation to get a sequence which has the longest LIS(Strictly Increasing).
You need transform every letter in this string to a new number.
A is the set of letters of S, B is the set of natural numbers.
Every injection f:A→B can be treat as an legal transformation.
For example, a String “aabc”, A={a,b,c}, and you can transform it to “1 1 2 3”, and the LIS of the new sequence is 3.
Now help Lweb, find the longest LIS which you can obtain from S.
LIS: Longest Increasing Subsequence. (https://en.wikipedia.org/wiki/Longest_increasing_subsequence)
Then T lines follow, the i-th line contains a string S only containing the lowercase letters, the length of S will not exceed 105.
aabcc
acdeaa
Case #2: 4
#include<stdio.h>
#include<string.h>
#define N 10000006
char s[N];
int a[N];
int main(void)
{
int t, ans, i, j;
scanf("%d", &t);
j = 0;
while(t--)
{
j++;
ans = 0;
memset(a, 0, sizeof(a));
scanf("%s", s);
int n = strlen(s);
for(i = 0; i < n; i++)
a[s[i] - 'a' + 1]++;
for(i = 1; i <= 26; i++)
{
if(a[i])//判断26个英文字母是否出现过, 出现过长度就加1.
ans++;
}
printf("Case #%d: %d\n", j, ans);
}
}