#include<cstdio>
#include<cstring>
char s[100010];
char *p=s;
char operand[4][4] = {"+-", "*/", "^", ""};
const long hmax = 2;
    long op(long x,long y,char c){
        switch(c){
            case '+':return x+y;
            case '-':return x-y;
            case '*':return x*y;
            case '/':return x/y;
        }
    }
    long eval(long);
    long elem() {
        long r=0;
        if ( *p == '(' ) {
            ++p; r = eval(0); ++p;
        }
        else {
            while ( strchr("0123456789", *p) )
                r = r*10 + *(++p-1) - '0';
        }
        return r;
    }
    long eval(long h) {
        long r = (h==hmax)?elem():eval(h+1);
        while ( strchr(operand[h], *p) )
            r = op(r, eval(h+1), *(++p-1));
        return r;
    }
    int main(){
        fgets(s, 100010, fopen("evaluare.in", "r"));
        fprintf(fopen("evaluare.out", "w"), "%ld\n", eval(0));
        return 0;
    }