题解

#include<bits/stdc++.h>
using namespace std;
string s;
int n;
int main()
{
    cin>>n;
    while(n--)
    {
        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<<"\n";
    }
    return 0;
}