Submission #344368

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Source Code Expand

#include<iostream>

using namespace std;
#define rep(i,a,b) for(auto (i)=(a);(i)<(b);(i)++)
#define rev(i,a,b) for(auto (i)=(b)-1;(i)>=(a);(i)--)

const char dig = 'A' - 'a';

char form(char c,bool small){
	bool x = 'a' <= c&&c <= 'z';

	if (x&&!small)
		return(c + dig);
	else if (small&&!x)
		return(c - dig);
	else
		return(c);
}

int main(void){
	char s[20];
	int i=1;
	cin >> s;
	s[0] = form(s[0], false);
	while (s[i] != '\0')
		s[i] = form(s[i], true),i++;
	cout << s << endl;
	return(0);

}

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