题解

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

int main()
{
    int n; cin >> n;
    string s;
    for (int j=0;j<n;j++)
    {
        cin >> s;
        if (s[0]>='a' && s[0]<='z')
            s[0]-=32;
        for (int i=1;i<s.size();i++)
        {
            if (s[i]>='A' && s[i]<='Z')
                s[i]+=32;
        }
        cout << s<< endl;
    }
    return 0;
}