#include<stdio.h>
#include<string.h>
int main(){
    char binary[];
    scanf("%s",&binary);
    int n=strlen(binary);
    int value=0;
    for(int i=0;i<n;i++){
        value=(value<<1) | (binary[i] - '0');
    }
    if(binary[0]=='1'){
        value-=(1<<n);
    }
    printf("%s=%d",binary);
    return value;
}
}