Leetcode in Java && Oracle
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#N1680. Concatenation of Consecutive Binary Numbers
problem link
#solution
class Solution {
public int concatenatedBinary(int n) {
int digits=0;
long res=0;

for(int i=1; i<=n; i++){
if((i&(i-1))==0) digits++;
res=((res<<digits)+i)%1000000007;
}
return (int) res;
}
}
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