Codility Devide Zero

solution.java

 public static int solution(String s) {
    char[] val = s.toCharArray();
    int sum = 0;
    while(val[sum]=='0') {
      sum++;
    }
    int reduce = 0;
    for(int k=val.length-1; k>=sum; k--){
      if(val[k] =='1'){
        reduce+=2;
      }else{
        reduce++;
      }
    }
    return reduce-1;
  }