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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#define MAX_DATA 30000
typedef struct brainfuck{
char data[MAX_DATA];
char command[MAX_DATA];
char *ptr;
int count;
int pos;
}bf;
bf one;
void init()
{
char c;
memset(&one, 0, sizeof(one));
one.pos = 0;
one.count = 0;
one.ptr = one.data;
while (c = getchar())
{
if (c == '\n')
break;
else
{
one.command[++one.count] = c;
}
}
one.command[one.count] = '\0';
}
void run()
{
char c;
int i;
while (c = one.command[++one.pos])
{
switch (c)
{
case '+':
(*one.ptr)++;
break;
case '-':
(*one.ptr)--;
break;
case '>':
one.ptr++;
break;
case '<':
one.ptr--;
break;
case ',':
*one.ptr = getchar();
break;
case '.':
putchar(*one.ptr);
break;
case '[':
if (*one.ptr != 0)
break;
else
{
for (i = one.pos + 1; i <= one.count; i++)
{
if (one.command[i] == ']')
{
one.pos = i;
break;
}
}
}
break;
case ']':
if (*one.ptr == 0)
break;
else
{
for (i = one.pos - 1; i >= 1; i--)
{
if (one.command[i] == '[')
{
one.pos = i;
break;
}
}
}
break;
}
}
}
int main(int argc, char **argv)
{
if (argc > 1) {
freopen(argv[1], "r", stdin);
}
init();
run();
return 0;
}
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