题解 | 找x

#include <bits/stdc++.h>

using namespace std;

const int MAXN = 200;
int arr[MAXN];
int main() {
    int n;
    while(cin >> n) {
        for(int i = 0; i < n;++i) {
            cin >> arr[i];
        }
        int x;
        cin >> x;
        bool found = false;
        for(int i = 0; i < n; ++i) {
            if(arr[i] == x) {
                cout << i << endl;
                found = true;
                break;
            }
        }
        if (!found) {
            cout << -1 << endl;
        }
    }
    return 0;
}