문제
풀이
#include <algorithm>
#include <iostream>
#include <vector>
using namespace std;
void solve(void) {
int n, m; cin >> n >> m;
vector<int> a(n);
for (int i=0; i<n; i++) cin >> a[i];
sort(a.begin(), a.end());
while (m--) {
int d; cin >> d;
int idx = distance(a.begin(), lower_bound(a.begin(), a.end(), d));
cout << (idx == n || a[idx] != d ? -1 : idx) << "\n";
}
}
int main(void) {
ios::sync_with_stdio(false);
cin.tie(nullptr);
solve();
return 0;
}