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: Accepted)


#include <stdio.h>



int main(void)
{
	//変数の宣言
	char name[15];
	int a=0;
	int c=0;
	int all=0;
	int i,j;
	int len;
	
	//データの読み込み
	scanf("%s",&name);
	
//	printf("nは%dです\n", n);
//	printf("データの読み込み終了\n");
	
	
	//実際の処理
	
	len = strlen(name);
	
	if(name[0]=='A'){
		a++;
	}
	
	for(i=2;i<len-1;i++){
		if(name[i]=='C'){
			c++;
		}
	}
	
	for(i=0;i<25;i++){
		for(j=0;j<len;j++){
			if(name[j]=='A'+i){
				all++;
			}
		}
	}
	
	
//	printf("計算部分終了\n");
	
	//出力
	
	if(a==1&&c==1&&all==2){
		printf("AC");
	}else{
		printf("WA");
	}
	
//	printf("結果の出力終了\n");
	
	return 0;
}