Contest1261/E.cpp

#include<bits/stdc++.h>
using namespace std;

//问题 E: 凌波微步 排序去重
int main() {
    int T;
    cin >> T;
    while (T--) {
        int n;
        cin >> n;
        int a[n];
        for (size_t i = 0; i < n; i++)cin >> a[i];
        sort(a, a + n);
        int m = unique(a, a + n) - a;
        cout << m << endl;
    }

    return 0;
}