题解 | #skew数#

//其实看到有多组测试，题目却又没说输入某个数字时退出时，从这就能知道用字符串存储了
#include "stdio.h"
#include "string"
#include "math.h"
using namespace std;

int main(){
    char buf[1000];string str;
    while (fgets(buf,1000,stdin)!=NULL) {
        str = buf;int sum = 0;
        str.pop_back();
        for (int i = 0; i<str.size(); ++i) {
            sum += (buf[i]-'0')*(pow(2,str.size()-i)-1);
            buf[i] = '\0';
        }
        printf("%d\n",sum);
        str.clear();
    }
}