A - Diverse Strings
A string is called diverse if it contains consecutive (adjacent) letters of the Latin alphabet and each letter occurs exactly once. For example, the following strings are diverse: "fced", "xyz", "r" and "dabcef". The following string are notdiverse: "az", "aa", "bad" and "babc". Note that the letters 'a' and 'z' are not adjacent.
Formally, consider positions of all letters in the string in the alphabet. These positions should form contiguous segment, i.e. they should come one by one without any gaps. And all letters in the string should be distinct (duplicates are not allowed).
You are given a sequence of strings. For each string, if it is diverse, print "Yes". Otherwise, print "No".
Input
The first line contains integer nn (1≤n≤1001≤n≤100), denoting the number of strings to process. The following nn lines contains strings, one string per line. Each string contains only lowercase Latin letters, its length is between 11 and 100100, inclusive.
Output
Print nn lines, one line per a string in the input. The line should contain "Yes" if the corresponding string is diverse and "No" if the corresponding string is not diverse. You can print each letter in any case (upper or lower). For example, "YeS", "no" and "yES" are all acceptable.
Example
Input
8
fced
xyz
r
dabcef
az
aa
bad
babc
Output
Yes
Yes
Yes
Yes
No
No
No
No
思路：字符串排序，若字符不重复则为Yes，可以通过排序解决：
Diverse Strings C++ - 轻舟载君不载愁 - CSDN博客
（原创）Codeforces Round #550 (Div. 3) A Diverse Strings - 叶坚持 - 博客园
#include<cstdio>
#include<cstdlib>
#include<cstring>
#include<cmath>
#include<ctime>
#include<string>
#include<stack>
#include<queue>
#include<map>
#include<vector>
#include<set>
#include<iostream>
#include<algorithm>
using namespace std;
int main() {
int t;
while (cin >> t) {
while (t--) {
string s;
map<char,int> str;
cin >> s;
sort(s.begin(), s.end());
for (int i = 0; i < s.size(); i++) {
str[s[i]]++; //判断重复
}
int flag1 = 0;
int flag2 = 0;
for (int i = 0; i < s.size(); i++) {//判断重复，有重复的话flag=1
if (str[s[i]] > 1) {
flag1 = 1;
break;
}
}
for (int i = 1; i < s.size(); i++) {
if ((s[i] - '0') != (s[i - 1] - '0') + 1) {//判断是否连续
flag2 = 1;
}
}
if (flag1 == 1||flag2 == 1) {
cout << "NO" << endl;
}
else {
cout << "YES" << endl;
}
}
}
}
