Gold Rush(hnu13249)

Gold Rush

Time Limit: 2000ms, Special Time Limit:5000ms, Memory Limit:65536KB

Total submit users: 15, Accepted users: 10

Problem 13249 : No special judgement

Problem description

Alice and Bob are on an adventure trip. Deep in the woods they discover a mysterious deep cave which they enter flutteringly. They find an old console with a giant bar of gold in it. On the bar, there is a number n. Both tried to carry the gold out the cave, but it was still to heavy for one of them.

Suddenly a little fairy appears in the corner of the cave and approaches Alice and Bob: “This gold is heavy. It weights 2ⁿ femto-grams (10^-15) and n can reach 62.” 

Bob answered: “What luck! Alice’s knapsack can carry up to a femto-grams and mine b femto-grams with a + b = 2ⁿ.” Alice interjected: “But how can we divide the gold?” 

Fairy: “I can help you with a spell that can burst one piece of gold into two equally weighted ones. But for each single spell, the cave will be locked one additional day.” 

Alice consults with Bob to use the help of the fairy and take all of the gold. How long will they be trapped if they are clever?

Input

The input starts with the number t <= 1000 of test cases. Then t lines follow, each describing a single test case consisting of three numbers n, a and b with a, b >= 1, a + b = 2ⁿ, and 1 <= n <= 62.

Output

Output one line for every test case with the minimal number of days that Alice and Bob are locked in the cave.

Sample Input

3
2 2 2
2 1 3
10 1000 24

Sample Output

1
2
7

Problem Source

GCPC 2014

 

 

题目链接：http://acm.hnu.cn/online/?action=problem&type=show&id=13249&courseid=311

转载请注明出处：寻找&星空の孩子

#include<stdio.h>
#define LL __int64

LL a,b;
int main()
{
    int n,T;
    scanf("%d",&T);
    while(T--)
    {
        scanf("%d%I64d%I64d",&n,&a,&b);
        int p=0,q=0;
        for(int i=0;i<=n;i++)
        {
            if(a%2)
            {
                p=i;
                break;
            }
            a/=2;
        }
        for(int i=0;i<=n;i++)
        {
            if(b%2)
            {
                q=i;
                break;
            }
            b/=2;
        }
        if(p<q)p=q;
        printf("%d\n",n-p);

    }
    return 0;
}