Main.c:1:20: fatal error: iostream: No such file or directory compilation terminated.
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# include<iostream>
using namespace std;
int main() {
string s;
while (getline(cin, s)) {
for (int i = 0; i < s.size(); i++) {
if ('A'<=s[i] && s[i]<='Z') {
s[i] = (s[i]-'A' + 3) % 26 + 'A';
} else if ('a'<=s[i] && s[i]<='z') {
s[i] = (s[i]-'a' + 3) % 26 + 'a';
}
}
cout << s << endl;
}
return 0;
}