a054: 電話客服中心 FYI: https://yunlinsong.blogspot.com/2016/02/blog-post_15.html

a054.cpp

#include <iostream>
using namespace std;

void prtResult(int n)
{
	switch(n) {
		case 10:
			cout << "BNZ" << endl;
			break;
		
		case 1:
			cout << "AMW" << endl;
			break;
		
		case 2:
			cout << "KLY" << endl;
			break;

		case 3:
			cout << "JVX" << endl;
			break;
			
		case 4:
			cout << "HU" << endl;
			break;
			
		case 5:
			cout << "GT" << endl;
			break;
			
		case 6:
			cout << "FS" << endl;
			break;
			
		case 7:
			cout << "ER" << endl;
			break;
			
		case 8:
			cout << "DOQ" << endl;
			break;
			
		case 9:
			cout << "CIP" << endl;
			break;
			
		default:
			cout << "Error" << endl;
			break;		
	}
	
}

int main() {
	string num;
    while(cin >> num)
	{
		int sum = 0;
		for(unsigned int i = 0; i < num.size() - 1; i++)
		{			
			sum += (num[i] - '0') * (8-i);
		}

		sum += (num[num.size() - 1]-'0');		
		int tar = 10 - (sum % 10);
		prtResult(tar);
    }
	
    return 0;
}