5 solutions

  • 1
    @ 2023-8-15 10:00:59

    先将2的幂次方都计算出来,存入一个数组中。 再用二分查找看给的数是否在数组中。 题解这里格式有点乱,。。。。


    #include<bits/stdc++.h>
    using namespace std;
    typedef long long LL;
    
    int main(){
    int m;
    cin>>m;
    vector<LL> a;
    int i;
    for(i=0;i<=100;i++){
    a.push_back(pow(2,i));
    }
    LL n;
    while(m--){
    cin>>n;
    /////////////二分查找模板////////////////////
    int left = 0;
    int right = a.size() - 1;
    bool flag = false;
    while(left<=right){
    int middle = left + ((right - left)/2);
    if(a[middle]>n){
    right = middle - 1;
    }
    else if(a[middle]<n){
    left = middle + 1;
    }
    else{
    flag = true;
    break;
    }
    }
    /////////////二分查找模板////////////////////
    if(flag == true){
    cout<<"YES";
    }
    else{
    cout<<"NO";
    }
    cout<<endl;
    }
    return 0;
    }
    

    Information

    ID
    47
    Time
    1000ms
    Memory
    256MiB
    Difficulty
    8
    Tags
    # Submissions
    1456
    Accepted
    228
    Uploaded By