Problem:
Score : 200 points

Problem Statement

You are given a string S. Each character of S is uppercase or lowercase English letter.
Determine if S satisfies all of the following conditions:

The initial character of S is an uppercase A.

There is exactly one occurrence of C between the third character from the beginning and the second to last character (inclusive).

All letters except the A and C mentioned above are lowercase.

Constraints

4 ≤ |S| ≤ 10 (|S| is the length of the string S.)

Each character of S is uppercase or lowercase English letter.

Input

Input is given from Standard Input in the following format:

S

Output

If S satisfies all of the conditions in the problem statement, print AC; otherwise, print WA.

Sample Input 1

AtCoder

Sample Output 1

AC

The first letter is A, the third letter is C and the remaining letters are all lowercase, so all the conditions are satisfied.

Sample Input 2

ACoder

Sample Output 2

WA

The second letter should not be C.

Sample Input 3

AcycliC

Sample Output 3

WA

The last letter should not be C, either.

Sample Input 4

AtCoCo

Sample Output 4

WA

There should not be two or more occurrences of C.

Sample Input 5

Atcoder

Sample Output 5

WA

The number of C should not be zero, either.

Solution in C++14 (GCC 5.4.1) (judge verdict: Wrong Answer)

#include<iostream>
#include<string.h>
#include<stdio.h>

using namespace std;

int main(){
  int i, ss, answer;
  char array[10];
  answer = 0;
  cin >> array;
  if(array[0]=='A'){
    for(i = 2;i <= strlen(array) - 1;i++){
      if(array[i]=='C'){
        for(ss = 0;ss <= strlen(array);ss++){
          if((array[ss]>='A')&&(array[ss]<='Z')){
            answer++;
          }
        }
        if(answer==2){
          cout << "AC" << endl;
        }
        else if(answer<2||answer>2){
          cout << "WA" << endl;
        }
        break;
      }
      else if(array[i] ==! 'C' && array[strlen(array)] ==! 'C'){
        cout << "WA" << endl;
      }

    }
  }
else{
  cout << "WA" << endl;
}
return 0;
}