tijie

有点简单

#include<bits/stdc++.h>
using namespace std;
int main() {
	int t;
    cin >> t;
    while (t--) {
        int n;
        cin >> n;
        string s[110] = {};
        for (int i = 1; i <= n; i++)
            cin >> s[i];
        sort(s + 1, s + 1 + n);
        string a = "";
        for (int i = 1; i <= n; i++) a += s[i];
        bool flag = true;
        for (int i = 1; i < a.size(); i++)
            if(a[i] < a[i-1]) flag = false;
        if(flag) cout << 1 << endl;
        else cout << 0 << endl;
    }
	return 0;
}