a020. 身分證檢驗 | From: [36.225.247.1] | 發表日期 : 2014-01-14 13:59

#include <stdio.h>

int main(){

char array[10];

int value;

while(~scanf("%s", &array)){

switch(array[0]){

case 65 ... 72:value=array[0]-55; break;

case 73:value=array[0]-39; break;

case 74 ... 78:value=array[0]-56; break;

case 79:value=array[0]-44; break;

case 80 ... 86:value=array[0]-57; break;

case 87:value=array[0]-55; break;

case 88 ... 89:value=array[0]-58; break;

case 90:value=array[0]-57; break;

}

value=(value/10)+((value%10)*9)+(array[1]-48)*8+(array[2]-48)*7+(array[3]-48)*6+(array[4]-48)*5+(array[5]-48)*4+(array[6]-48)*3+(array[7]-48)*2+(array[8]-48)*1+(array[9]-48);

if(value%10==0) printf("real\n");

else printf("fake\n");

}

return 0;

}