poj 1524 Cowculations

#include <cstdio>char tablet[6][9];int CowToInt(char *s) {    int ret = 0;    for ( ; *s; ++s) {        ret <<= 2;        if (*s == 'U') ret += 1;        else if (*s == 'C') ret += 2;        else if (*s == 'D') ret += 3;    }    return ret;}void Work() {    for (int i = 0; i < 6; ++i)        scanf(" %s", tablet[i]);    int num1 = CowToInt(tablet[0]);    int num2 = CowToInt(tablet[1]);    for (int i = 2; i < 5; ++i) {        if (tablet[i][0] == 'A') num2 += num1;        else if (tablet[i][0] == 'L') num2 <<= 2;        else if (tablet[i][0] == 'R') num2 >>= 2;    }    int res = CowToInt(tablet[5]);    puts(num2 == res ? "YES" : "NO");}int main() {    int n;    scanf("%d", &n);    puts("COWCULATIONS OUTPUT");    while (n--) {        Work();    }    puts("END OF OUTPUT");    return 0;}