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 (GCC 5.4.1) (judge verdict: Wrong Answer)

#include <stdio.h>

int main(void)
{
	char c[11];
	int no;
	int count_C=0;
	int sum=0;
	
	scanf("%s",c);
	
	if(c[0]!='A'){
		no=1;
	}else if(c[1]=='C'){
		no=1;
	}else{
		int i=0;
		while(c[i]!='\0'){
			if(c[i]=='C'){
				count_C++;
			}
			i++;
			sum=sum+c[i];
		}
		if(count_C!=1){
			no=1;
		}else if(c[i-1]=='C'){
			no=1;
		}else if(sum<97*(i-3)+65+67){
			no=1;
		}else{
			no=2;
		}
	}
	
	switch (no){
	case 1:
		printf("WA\n");
		break;
	case 2:
		printf("AC\n");
		break;
	}
	
	return 0;
}