题解 | #skew数#
skew数
https://www.nowcoder.com/practice/5928127cc6604129923346e955e75984
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#define len 2000
int chartoint(char c){
int a = c-'0';
if(a>=0&&a<=9){
return a;
}
return -1;
}
int main(){
char str[len];
while(scanf("%s",str)!=EOF){
int n = strlen(str);
int res = 0;
for(int i = 0;i<n;i++){
res+=chartoint(str[i])*(pow(2,n-i)-1);
}
printf("%d\n",res);
}
}
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