#include <stdio.h>

#include <stdlib.h>

/* $begin opt-arith-ans */

#define M 31

#define N 8

/* $end opt-arith-ans */

#if 0

/* $begin opt-arith-ques */

#define M /* Mystery number 1 */

#define N /* Mystery number 2 */

/* $end opt-arith-ques */

#endif

/* $begin opt-arith-ques */

int arith(int x, int y) {

int result = 0;

result = x*M + y/N; /* M and N are mystery numbers. */

return result;

}

/* $end opt-arith-ques */

#define MB 15

#define NB 4

int arithb(int x, int y) {

int result = 0;

result = x*MB + y/NB; /* M and N are mystery numbers. */

return result;

}

/* $begin opt-arith-pseudo-a */

/* $begin opt-arith-pseudo-b */

/* Translation of assembly code for arith */

int optarith(int x, int y) {

/* $end opt-arith-pseudo-b */

int t = x;

x <<= 5;

x -= t;

if (y < 0) y += 7;

y >>= 3; /* Arithmetic shift */

return x+y;

}

/* $end opt-arith-pseudo-a */

/* Translation of assembly code for arith */

int optarithb(int x, int y) {

/* $begin opt-arith-pseudo-b */

int t = x;

x <<= 4;

x -= t;

if (y < 0) y += 3;

y >>= 2; /* Arithmetic shift */

return x+y;

}

/* $end opt-arith-pseudo-b */

int main(int argc, char *argv[]) {

int x = atoi(argv[1]);

int y = atoi(argv[2]);

int a = arith(x,y);

int b = optarith(x,y);

if (a != b)

printf("Whoops! ");

printf("A: x = %d, y = %d, normal --> %d, opt --> %d\n", x, y, a, b);

a = arithb(x,y);

b = optarithb(x,y);

if (a != b)

printf("Whoops! ");

printf("B: x = %d, y = %d, normal --> %d, opt --> %d\n", x, y, a, b);

return 0;

}