>>174
#include <stdio.h>

int main(void)
{
int ch, sum = 0, temp = 0, flag = 1;

while(1) {
ch = getchar();
if('0'<=ch && ch <= '9') temp = temp * 10 + ch - '0';
else {
sum += flag * temp;
temp = 0;
if(ch == '\n' || ch == EOF) break;
if(ch == '+') flag = 1;
else if(ch == '-') flag = -1;
else return 1;
}}

printf("%d", sum);

return 0;
}