1419B-Stairs.cpp

#include <cstdio>
typedef long long ll;

int main(){

    ll t; scanf("%lld", &t);
    while(t--){
        ll x; scanf("%lld", &x);
        ll y(1), res(0);
        while(2 * x >= y * (y + 1)){
            x -= y * (y + 1) / 2;
            y = 2 * y + 1; 
            ++res;
        }

        printf("%lld\n", res);
    }

    return 0;
}