uva 575 - Skew Binary

简单的进制转换

#include <iostream>
#include <cmath>
#include <string>
using namespace std;
//#define TEST
int main() {
#ifdef TEST
	freopen("input.txt", "r", stdin);
#endif
	string s;
	while(cin >> s && s[0] != '0') {
		int ans = 0;
		for(int i = 1; i <= s.size(); i++) {
			ans = ans + (s[s.size() - i] - '0') * ((1 << i) - 1);
		}
		cout << ans << endl;
	}
	return 0;
}