#include <iostream>
#include <cmath>
using namespace std;

int na10(string dana) {
	int pom = 0;
	int dl = dana.length();
	for (int i = 0; i < dl; i++){
		int x = int(dana[dl-i-1]) - 48;
		pom - pom + x * pow(8, i);
	}
	return pom;
	}
	
	int main() {
		cout << na10("174") << endl;
		cout << na10("362374") << endl;
		return 0;
	}