import std.stdio, std.conv, std.math, std.string, std.range, std.array,
       std.algorithm;

void main() {
    auto N = readln().strip().to!ulong();

    ulong sum;

    ulong i = N;
    while(i > 0) {
        sum += i;
        i/=2; 
    }

    writeln(N*2 - sum);
}