虽然只有一种味，但真的很 鲜~

向日葵味

#include<bits/stdc++.h>
using namespace std;
int n, m;  
int a[10000005];  
int main(){
    cin >> n >> m;  
    for(int i=1; i<=n; i++){
        cin >> a[i];
    }

    for(int i=1; i<=m; i++){  
        int ans;  
        cin >> ans;
        int l = 1, r = n, res = -1;  
        while (l <= r) {
            int mid = (l + r) / 2;
            if (a[mid] == ans) {
                res = mid;  
                r = mid - 1;  
            } else if (a[mid] < ans) {
                l = mid + 1;
            } else {
                r = mid - 1;
            }
        }
        cout << res << "\n";  
    }
    return 0;
}