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#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#define MAX_STACK 1024
typedef struct
{
char data[MAX_STACK];
int sp;
} stack;
static char *ReadLine(char *p, size_t size, FILE *fp)
{
if ((p=fgets(p, size, fp)))
{
size_t l = strlen(p);
while(l && p[l-1] == '\n')
{
p[--l] = 0;
}
}
return p;
}
static char AnyOpen(int c)
{
switch(c)
{
case '(':
return 1;
case '[':
return 1;
case '{':
return 1;
case '<':
return 1;
default:
return 0;
}
}
static char AnyClose(int c)
{
switch(c)
{
case ')':
return 1;
case ']':
return 1;
case '}':
return 1;
case '>':
return 1;
default:
return 0;
}
}
static char Close(int fromopen)
{
switch(fromopen)
{
case '(':
return ')';
case '[':
return ']';
case '{':
return '}';
case '<':
return '>';
default:
return 0;
}
}
static void Push(stack *s, char c)
{
if (s->sp == MAX_STACK)
{
printf("Stack too big!\n");
exit(1);
}
s->data[s->sp++] = c;
}
static char Pop(stack *s)
{
if (s->sp == 0)
{
printf("Stack too small!\n");
exit(1);
}
return s->data[--s->sp];
}
static int SyntaxError(char *p)
{
char c = 0;
int score = 0;
stack s = {0};
while((c = *p++))
{
if (AnyOpen(c))
{
Push(&s, c);
}
if (AnyClose(c))
{
char close = Close(Pop(&s));
if (close != c)
{
if (c == ')')
{
return 3;
}
if (c == ']')
{
return 57;
}
if (c == '}')
{
return 1197;
}
if (c == '>')
{
return 25137;
}
printf("Unexpected character %c\n", c);
}
}
}
return 0;
}
int main(void)
{
char buff[0x8000];
int sum = 0;
int score = 0;
int f = 0;
while(ReadLine(buff, sizeof buff, stdin))
{
score = SyntaxError(buff);
sum += score;
}
printf("sum = %d\n", sum);
return 0;
}
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