문제
풀이
#include <iostream>
using namespace std;
inline char change(char c) {
return (c ^ 32);
}
void solve(void) {
string s; cin >> s;
for (char c : s) cout << change(c);
}
int main(void) {
ios::sync_with_stdio(false);
cin.tie(nullptr);
solve();
return 0;
}