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userId_undefined

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倔强青铜

2024-07-28 17:10:33

发布于：浙江

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#include<iostream>
using namespace std;
int n,x,a[1000005]={},sum,l,r,m;
int main(){
	cin>>n>>m;
	for(int i=1;i<=n;i++){
		cin>>a[i];
	}
	for(int i=0;i<m;i++){
		cin>>x;
		sum=-1,l=1,r=n;
		while(l<=r){
			int mid=(l+r)/2;
			if(a[mid]==x){
				sum=mid;
			}if(a[mid]>=x){
				r=mid-1;
			}else{
				l=mid+1;
			}
		}
		cout<<sum<<" ";
	}
}
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全部评论 2

  • userId_undefined

    仁

    倔强青铜

    超时了，范围太小了

    2024-08-19 来自 江苏

    0
  • userId_undefined

    YYC

    倔强青铜

    同问

    #include <bits/stdc++.h>
using namespace std;
typedef long long ll;
ll a[10000005];
int main()
{
    ll n;
    cin>>n;
    ll t;
    cin>>t;
    for(ll i = 1;i<=n;i++)
        cin>>a[i];
    while(t--){
        ll k;
        bool flag = false;
        cin>>k;
        ll l = 1;
        ll r = n;
        while(l<=r)
        {
            ll mid = (l+r)/2;
            if(a[mid]==k&&a[mid-1]==k||a[mid]>k)
            {
                r=mid-1;
            }
            else if(a[mid]<k)
            {
                   l=mid+1;
            }
            else
            {
                cout<<mid<<" ";
                flag = true;
                break;
            }
        }
        if(!flag)
        {
            cout<<-1<<" ";
        }
        flag=false;
    }
    return 0;
}

    2024-08-03 来自 陕西

    0
    • userId_undefined

      纯粹容器

      回复YYC

      +1

      #include<iostream>
using namespace std;
int main(){
    int a,b,arr[9999999],c;
    cin >> a >> b;
    for(int i = 0 ; i < a ; i++) cin >> arr[i];
    for(int i = 0 ; i < b ; i++){
        cin >> c;
        int temp = -1;
        for(int i = 0 ; i < a ; i++){
            if(arr[i] == c){
                temp = i+1;
                break;
            }
        }
        cout << temp << ' ';
    }
}

      2024-08-11 来自 陕西

      0

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