用陣列存放 A~Z 對應之數字。
Use an array to determine what numbers A~Z correspond to.
ZeroJudge Link (Zh)
#include <stdio.h>
const char LETTERS[] = {10 ,11, 12, 13, 14, 15, 16, 17, 34, 18, 19, 20, 21,
22, 35, 23, 24, 25, 26, 27, 28, 29, 32, 30, 31, 33};
main() {
char str[100], chr[] = "X";
while (scanf("%s", str) != EOF) {
int i, res = LETTERS[str[0] - 'A'];
res = res / 10 + (res % 10) * 9;
for (i = 1; i < 9; i++) {
chr[0] = str[i];
res += atoi(chr) * (9 - i);
}
chr[0] = str[9];
res += atoi(chr);
printf("%s\n", res % 10 ? "fake" : "real");
}
return 0;
}